Albums

New Found Glory - Make The Most Of It
Palette Knife - New Game+
Karma Kids - Sadland (Deluxe Edition)
remy - could the grass be greener
The Raging Nathans - Still Spitting Blood
Limp Wizurdz - Vile
Dosser - Violent Picture / Violent Sound
The Bad Ends - The Power And The Glory
The 1984 Draft - Best Friends Forever
Falling Forward - Let These Days Pass: The Complete Anthology 1991-1995
Mark Murphy And The Meds - Monochrome
Futuristic - Never 2 Late
K.Williams - Bite My Tongue
Cosmopaark - and I can't breathe enough
13 Necklace - 13N
Strawberry Fuzz - Strongs Dr.
Danny VanZandt - Music to Your Ears
Lauds - Imitation Life
Cicadahead - songs for bugs
saturdays at your place - always cloudy (EP)
Ben DeHan - Blank Check (EP)
Forty Winks - Kids (EP)
Relate. - Chemical Condition (EP)
Floor Hockey - evergreen (EP)
personplacething - this is useless (EP)
Surf Trash - Under The Radar (EP)
Dark Waters - Fever Dream (EP)
Brainiac - The Predator Nominate (EP)
Patter - Patter Theme (EP)
Sticky Steve - It Comes In Waves (EP)
Tetnis - Sealed Evidence DO NOT TAMPER! #1 (EP)
Melonball - Sicker (EP)

Singles

Fall Out Boy - Love From The Other Side
The Bouncing Souls - Ten Stories High / Higher Ground
Story Of The Year - War
Can't Swim - me vs me vs all of y'all
Wednesday - Chosen to Deserve
City and Colour - Underground
Dave Hause - Hazard Lights
Softcult - Dress
snow ellet - Elevator
Wolf Culture - Indigo Child (Live at The Ranch)
Narrow Head - Caroline
Careful Gaze - Silken Robe
NNAMDÏ - Sudafed
Ryan Oakes - DOWN
THE GOA EXPRESS - Portrait
Screaming Females - Brass Bell
Crooked Teeth (feat. Cami Petyn) - Loser
Eli Hurts - Hot Shit
Old Neon - Autumn
SayWeCanFly - October
Babies on a Halfpipe - Garden Tools & Cat Litter
Dory-Loup - The Other Side
Rival Town - Run
Lucero - Macon If We Make It
Sick Joy - Painkiller
The Tyne (feat. NOAHFINNCE) - (NOT A) LOVE SONG
Sam Tinnesz (feat. Nick Wheeler) - Spaced Out
Rust Ring - Tiny Frame
Anchors & Hearts - Never Thought
Swim Camp - Dougie (For Sharyl)
For When You Can't Breath (feat. Lil Used) - It's Not Like It Would've Worked Out Anyway
From States Away - Hold Me Down
Plasma Canvas - Election Year Relapse
Dusty Cubby - Yukon Suckerpunch
Sleaford Mods - UK GRIM
Poplar Creek - Only Constant
Deerhoof - Sit Down, Let Me Tell You a Story.
Say It Anyway - Bad Luck Days
They Fell From The Sky - Stay in bed
Bleak Soul - Suffer Through
Blood Command - Leave A Light On
Riverview - Lighthouse
Keeper (feat. King Theta) - Who Cares
New Love - Someone Should Take You Dancing
Bedridden - Clara's Mouth
Loose Lips - Lalalalove
Twin Stacks - 1,000 Mph
triton. (feat. Geoff Rickly) - alcatraz_
The Sleeping Souls - Caught up in the Scrape
Watching Tides - Have You Seen
Danvers - There's No 'I' in a Modern Country Cover Band
twentythreenineteen - Opia
Airhockey - Close
MSPAINT (feat. Militarie Gun) - Delete It
Zack Fowler - SOS
saywhen - catch23
I Swallow Ghosts - Friendsgiving Edibles
Ben Lapidus - Less Happy More Free
Stablemate - Brotherhood
Felkers - Wonder
Coral Grief - Copycat
Good Bison - Better Lies
Via Fiori - Floating Away
Grocer - Downtown Slide
Straight Arrows - Fast Product
Truth Club - It's Time
JSTNXMLLR - Sleep On It
The Van Pelt - Punk House
Thru It All - Tangled
Brian Tafazoli - brian tafazoli accidentally drives 9 hours to mt vernon ohio
FOOTBALLHEAD - SNOWBALL
PGC - Whiskey On You
Donots - Hunde los
Maloy - Unrequited
Gymshorts - Love You Funny
Johnnie Guilbert - Cute Without the 'E' (Cut From the Team) (Taking Back Sunday Cover)
Goot - Die4U (Bring Me The Horizon Cover) / Reinventing Your Exit (Underoath Cover)
Digikitty - Laughing Gas
7 Seconds - Walk Together, Rock Together

Other

Pop/Indie/Rap
Albums
Trippie Redd - MANSION MUSIK
Lukas Graham - 4 (The Pink Album)
HARDY - the mockingbird & THE CROW
Mac DeMarco - Five Easy Hot Dogs
Jadu Heart - Derealised
Kota the Friend - Lyrics to GO, Vol. 4
Ryuichi Sakamoto - 12
Coco Jones - What I Didn't Tell You (Deluxe)
Låpsley - Cautionary Tales of Youth
Ladytron - Time's Arrow
We Are Scientists - Lobes
John Cale - MERCY
EVNTYD - Eventide
Josh Cashman - Collection Of Colour
Dave Rowntree - Radio Songs
Fran - Leaving
Battleviews - All of My Days
Myke Towers - Sweet & Sour (EP)
Ice Spice - Like..? (EP)
Biig Piig - Bubblegum (EP)
boygenius - the record (EP)
the moss - Insomnia (EP)
Singles
Ed Sheeran - F64
Sam Smith - Gloria
Kim Petras - brrr
The Kid LAROI - I Can't Go Back To The Way It Was (Intro)
A$AP Rocky - Same Problems?
Macklemore (feat. DJ Premier) - HEROES
Elley Duhé (feat. Whethan) - MONEY ON THE DASH
Skrillex & Bobby Raps - Leave Me Like This
Nicky Jam - Toy a Mil
Kali Uchis - I Wish you Roses
Dolly Parton - Don't Make Me Have To Come Down There
Shakin' Stevens - It All Comes Round
NLE Choppa - 23
SYML - Chariot
TWICE - MOONLIGHT SUNRISE
Beach Weather - Homebody
Jordan Davis - No Time Soon
Popcaan - Great Is He
Matt Maltese - Driving Just to Drive
Rich The Kid (feat. Famous Dex & Jay Critch) - Where's Dexter
Two Door Cinema Club - Millionaire (Dan Be Remix)
CJ - Gangsta
Headie One - Martin's Sofa
mazie - it's not me (it's u)
The National - Tropic Morning News
Hunter Hayes - Sober
khai dreams - Panic Attack
Arlo Parks - Weightless
Alice Merton - Waste My Life
Billie Marten - This Is How We Move
Fruit Bats - Rushin' River Valley
Restless Road - On My Way
Ashley Kutcher - Everyone And No One
Gatlin - Still Not Me
Eloise - Drunk On A Flight
Katy Nichole - Please
Nick Waterhouse - Hide And Seek / The Fooler
Yellow Days - Soul Smile
Ruston Kelly - The Weakness
The Academic - My Very Best
DMA'S - Fading Like A Picture
Andy Shauf - Telephone
Yaeji - For Granted
DICE - Eyes Ahead
Connor Kauffman - All Your Friends
Austin George - Can't Leave
Rei Yasuda - HOME THERAPY
44phantom - cherry cigarettes
Fenne Lily - Lights Light Up
Caitlyn Smith - Lately
Ron Gallo - AT LEAST I'M DANCING
Tanukichan (feat. Enumclaw) - Thin Air
Miya Folick - Get Out of My House
Gretel Hänlyn - Wiggy
Black Honey - Up Against It
Citizens - Good Ground
Overmono - Is U
Chad Tepper (feat. Matisyahu) - Buy Us A House
underscores - Count of three (You can eat $#@!)
Dizzy - Birthmark
Orchid Mantis (feat. surfgoth) - time and space
Mac Wetha (feat. Rachel Chinouriri) - Fairytale
Eli Smart - Done Me
Squirrel Flower - Your Love
Abigail Osborn - I Do You
Brevin Kim - ShoulderBlades
Bayonne - Right Thing
Kids In America (feat. John Samuel) - Somewhere In The Hills
Tyzo Bloom (feat. girlhouse) - dad?
Baerd - Let Go of the Myth
shingami - cut my wings
j solomon - Home
Sløtface - Nose
Tay B (feat. A Boogie Wit da Hoodie) - Ask
Julia Cooper - SWEET N SOUR
Jenny O. - You Are Loved Eternally
Worriers - Pollen in the Air
whenyoung - Shame Train
Skinny Pelembe - Oh, Silly George
Braids - Evolution
Flying Colours - Goodbye to Music
Nell Mescal - Homesick
Louise Burns - I Don't Feel it Like I Used To
Laveda - Clean
Baby Fisher - Sick Of This
Amber Arcades - True Love
Kylie V - Runaway
Lucy Tun - Kulture Klub
Redbud - Sad On The North Side
Ali T - Static
Emelia Austin - Shifting Weather
Paige Kennedy - Love You From A Distance
glass boys - Sunkissed
Dwen - Memory Foam
Rock
Albums
Måneskin - RUSH!
Guided By Voices - La La Land
SKÁLD - Huldufólk
Katatonia - Sky Void of Stars
First to Eleven - Cover Vol. 14
Oceans Ate Alaska - Disparity (Instrumental Edition)
The Murder Capital - Gigi's Recovery
Twilight Force - At the Heart of Wintervale
July Talk - Remember Never Before
Designer Disguise - Elswaer
Black Star Riders - Wrong Side of Paradise
Laura Cox - Head Above Water
For I Am King - Crown
The C.I.A. - Surgery Channel
Aiming for Enrike - Empty Airports
Imperium Dekadenz - Into Sorrow Evermore
Re-buried - Repulsive Nature
Dryad - The Abyssal Plain
Turbid North - The Decline
Riot Stares - Sounds Of Acceleration
Beauty Pill - Blue Period
Tension Rising - The Last Judgement
Out To Lunch - Out to Lunch featuring Etson
Frequency Response - The Milk
When Venus Weeps - The Art of Forgiveness (EP)
Afterdusk - Hollow Eyes (EP)
About Bunny - Mixtape Vol. 1 (EP)
Celestial Scourge - Dimensions Unfurled (EP)
Singles
Metallica - Screaming Suicide
ILLENIUM (feat. Nina Nesbitt) - Luv Me A Little
Skillet (feat. Adam Gontier) - Finish Line
BABYMETAL - METAL KINGDOM
In Flames - Meet Your Maker
Noel Gallagher's High Flying Birds - Easy Now
Sleep Token - Aqua Regia / Granite
Rival Sons - Rapture
Electric Callboy - We Got the Moves (Live 2022)
Dabn (feat. Kai Wachi & Lø Spirit) - Hollow
Halocene (feat. David Michael Frank & Lauren Babic) - Somewhere I Belong (Linkin Park Cover)
Chelsea Grin - Sing to the Grave
The Veer Union - 10:35
Ad Infinitum - Seth
Twenty One Two - Anti-Hero (Taylor Swift Cover) (Acoustic Version)
Villain of the Story - No More Sorrow
Insomnium - The Witch Hunter
The Animal In Me - Kill Bill
Gideon - MORE POWER. MORE PAIN.
Eyes Set To Kill - Darling (2023 Remastered)
THE HARA - Died in My Twenties
Calva Louise - Third Class Citizen
Notions (feat. Mobbs Radical) - ALL OUT OF LIVES
Berried Alive (with Mobbs Radical) - HELL IS ME
The Luka State - Matter of Fact
Breakdown of Sanity - Collapse
To The Grave - Cut Off The Head
Enforcer - Running In Menace (2023 Version)
Pile - Nude With A Suitcase
Darknet - idgaf
Stoned Jesus - Thoughts and Prayers
The Ocean - Preboreal
Rise Of The Northstar - One Love
Jesus Piece - Gates of Horn
Heidevolk - Wederkeer
As Everything Unfolds - Ultraviolet
Haken - Taurus
As The Structure Fails - Talk to Me
Ov Sulfur - Earthen
Ian Hunter (feat. Ringo Starr & Mike Campbell) - Bed Of Roses
Electric Enemy - Bleed Me Dry
Superchunk - Everything Hurts
Full Of Hell (feat. Primitive Man) - Rubble Home
Judiciary - Engulfed
Entheos - I Am the Void
Tragedy - I'm So Excited
Consvmer - Perfekt
My Diligent Future - Infinite Life
Termina (feat. Nik Nocturnal, Andy Cizek, Phil Bozeman & Joshua Travis) - Parasocial
Märvel - Catch 22
Acid King - Beyond Vision
Elyne - OUTBREAK II: THE RECKONING
Avocyn - The Hammer
Black Coast - Mercy
Atena - Subway Anthem
Model/Actriz - Crossing Guard
The Abbey - Starless
Downfall of Gaia - Bodies as Driftwood
Howl Like Wolves - Burn Me Down
In Fear - The Blinding White
Honest Crooks - Burn Eternal
When the World Sleeps - PRETEND
Omega Infinity - To the Stars
Maybsomeday (feat. Kellin Quinn) - Zombie
ERASE THEORY - Stay
headcave - Undivine
Marked;Life - Critical Hit
Vain Valkyries - Brittle Bone Disco
Knosis - 星砕
Denihilist - Sin Eater
Tithe - Parasite
Codefendants (feat. N8NOFACE) - Bad Business
Errorr - Innocent
Mudy On The 昨晩 - SUPER!!!!
LoveSick Radio - Last Goodbye
Bayline - Ignore the Devil
New Monarch - The Throne
Mikau - Offal Platter
Radium Jaw - Mender
Anchor Lane - I Don't Have Another Soul to Pour
Hell Diablo - Fire and Fury
A Moments Notice - End The Cycle
Northern Life - Ella
Sleepsculptor - An Equivalent Exchange
Apostles - Take It All
Mothersound - From The Gutter
Eyes Of A Killer - I Am Death
Royalty Kult - Peacemaker
Starcutter (feat. Raccoon City Massacre & Polygon Horizon) - Port Hope
Pieces of the Past - Anguish
Shell Beach - Feeble Glory
The World Is Quiet Here - Writhing Gate
I, Shapeshifter (feat. The Stygian Complex) - VII. WitchHunt
Soothsayer - 1999
Draemora - Into The Grave
Sermon - Golden
PRESSURES - Wasting Away
Caesaria (feat. Storm Orchestra) - Hope
Sixth Wonder - Saboteur
Waterlines - König
Andelana - Moshington (Fucked Up)
Valletta - Come Alive

https://docs.google.com/document/d/1Riy67WfoQFwW2l5BtTLg2lR7CSm2c3VE/edit?usp=sharing&ouid=109474854956598892099&rtpof=true&sd=true
SOLID STATE
Solids, amorphous, face centered, body centered, hexagonal close packing, nearest neighbours, simple ionic compounds.
Introduction
Solids are characterised by incompressibility, rigidity and mechanical strength. This indicates that the molecules, atoms or ions that make up a solid are closely packed, they are held together by strong cohesive forces and cannot move at random. Thus, in solids we have well ordered molecular arrangements.
Moreover solids are also characterised by a definite geometrical arrangement. Substances which satisfy all the characteristics of a solid except the definite geometrical arrangement are called amorphous substances (e.g. glass, rubber etc.).The definite geometrical arrangement of atoms, molecules or ions in a solid extends over the entire structure of the solid. This is termed as long range order.
Difference Between Solids And Amorphous Substances
i) The first major difference between a solid and an amorphous substance is the existence of a definite and orderly arrangement of molecules or atoms in 3 - D space. An amorphous substance, on the other hand, does not have any pattern of arrangement of molecules or atoms i.e, it does not have any geometrical shape. It has been found that even if some orderly arrangement of molecules or atoms exists in a few amorphous substances, it does not extend more than a few Angstrom units. Thus, unlike solids, amorphous substances do not have long range order.
ii) Due to the definite ordered state, a solid tends to melt at a very short range of temperature (exaggerated to say that it has a sharp melting point). While the amorphous substance melts at larger range of temperature.
iii) Amorphous substances differ from solids and in fact resemble liquids in an important respect. The properties such as electrical conductivity, thermal conductivity, mechanical strength and refractive index are the same in all directions. Amorphous substances are said to be isotropic. Liquids and gases are also isotropic. Solids, on the other hand are anisotropic, i.e, their physical properties are different in different directions. For example, the velocity
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of light passing through a solid varies with the direction in which it is measured. Thus, a ray of light entering such a solid may split up into two components each following a different velocity. This phenomenon is known as double refraction. Thus, anisotropy in itself is a strong evidence for the existence of ordered molecular arrangements in such materials.
Unit Cells
In this topic we would be studying certain properties of a solid which depend only on the constituents of the solid and the pattern of arrangement of these constituents. To study these properties, it would be convenient to take up as small amount of the solid as possible because this would ensure that we deal with only the minimum number of atoms or ions. This smallest amount of the solid whose properties resemble the properties of the entire solid irrespective of the amount taken is called a unit cell. It is the smallest repeating unit of the solid. Any amount of the solid can be constructed by simply putting as many unit cells as required.
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Bravais Lattices
Bravais (1848) showed from geometrical considerations that there are only seven shapes in which unit cells can exist. These are:
i) Cubic ii) Orthorhombic
iii) Rhombohedral v) Hexagonal
v) Tetragonal vi) Monoclinic and
vii) Triclinic.
Moreover, he also showed that there are basically four types of unit cells depending on the manner in which they are arranged in a given shape. These are : Primitive, Body Centered, Face Centered and End Centered. He also went on to postulate that out of the possible twenty eight unit cells (i.e. seven shapes × four types in each shape = 28 possible unit cells), only fourteen actually would exist. These, he postulated, based only on symmetry considerations. These fourteen unit cells that actually exist are called Bravais Lattices
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Primitive Unit Cell: In a primitive unit cell the same type of atoms are present at all the corners of the unit cell and are not present anywhere else. It can be seen that each atom at the corner of the unit cell is shared by eight unit cells (four on one layer, as shown, and four on top of these). Therefore, the volume occupied by a sphere in a unit cell is just one-eighth of its total volume. Since there are eight such spheres, the total volume occupied by the spheres is one full volume of a sphere. Therefore, a primitive cubic unit cell has effectively one atom.
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A primitive unit cell is created in the manner as shown in the figure. Four atoms are present in such a way that the adjacent atoms touch each other. Therefore, if the length of the unit cell is 'a', then it is equal to 2r, where r is the radius of the sphere. Four more spheres are placed on top of these such that they eclipse these spheres.
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Exercise 1: How many atoms are present in a primitive cell?
Packing Fraction
The packing efficiency of a unit cell can be understood by calculating what is called the packing fraction. It is defined as ratio of the volume of the unit cell that is occupied by the spheres of a unit cell to the volume of the unit cell.
Therefore, PF = 📷. (This implies that 52 % of the volume of a unit cell is occupied by the spheres).
Body Center Unit Cell : A Body Center unit cell is an unit cell in which the same atoms are present at all the corners and also at the center of the unit cell and are not present anywhere else. This unit cell is created by placing four atoms which are not touching each other. Then we place an atom on top of these four. Again, four spheres eclipsing the first layer are placed on top of this. The effective number of atoms in Body Center Unit Cell is 2 (One from all the corners and one at the center of the unit cell). Moreover, since in BCC the body centered atom touches the top four and the bottom four atoms, the length of the body diagonal () is equal to 4r. The packing fraction in this case is = 📷
Face Center Unit Cell : In an FCC unit cell, the same atoms are present at all the corners of the cube and are also present at the center of each square phase and are not present anywhere else. The effective number of atoms in FCC is 4 (one from all the corners, 3 from all the face centers since each face centered atom is shared by two cubes). Since, here each face centered atom touches the four corner atoms, the face diagonal of the cube 📷 is equal to 4r.
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Exercise 2: a) What is the void fraction in case of S.C., B.C.C and F.C.C?
b) Which is most packed structure S.C., B.C.C or F.C.C?
Seven crystal systems : The seven crystal systems are given below:
Crystal System
Bravais Lattices
Parameters of Unit Cell
Intercepts
Crystal angle

1. Cubic

Primitive, Face Centered, Body Centered = 3
a = b = c
α = β = γ = 90o

1. Orthorhombic

Primitive, Face Centered, Body Centered, End Centered = 4
a ≠ b ≠ c
α = β = γ = 90o

1. Tetragonal

Primitive, Body Centered =2
a = b ≠ c
α = β = γ = 90o

1. Monoclinic

Primitive, End Centered = 2
a ≠ b ≠ c
α = γ = 90o, β ≠ 90o

1. Triclinic

Primitive = 1
a ≠ b ≠ c
α ≠ β ≠ γ ≠ 900

1. Hexagonal

Primitive = 1
a = b ≠ c
α = β = 900, γ = 120o

1. Rhombohedral

Primitive = 1
a = b = c
α = γ = β ≠ 90o
Total = 14
Illustration 1: Iron (II) oxide, FeO, crystal has a cubic structure and each edge of the unit cell is 5Å. Taking density of the oxide as 4 g/cc, calculate the number of Fe2+ and O2- ions present in each unit cell.
Solution: Volume of the unit cell = (5 × 10-8 cm)3 = 1.25 × 10-22 cm3.
Density of FeO = 4 g cm-3
Therefore mass of unit cell = 1.25 × 10-22 × 4 = 5 × 10-22 g.
Mass of one molecule of FeO = Molar mass in g./ Avagadro's number
= 📷
Number of FeO molecules per unit cell = 📷
Close Packing of Atoms / Ions
Atoms are space filling entities and structures can be described as resulting from the packing of spheres. The most efficient, called Closest Packing, can be achieved in two ways, one of which is called Hexagonal Close Packing (Hexagonal Primitive) and the other, Cubic Close Packing (FCC). Hexagonal close packing can be built up as follows: Place a sphere on a flat surface. Surround it with six equal spheres as close as possible in the same plane. Looking down on the plane, the projection is as shown in Fig. 5 (a). Let us call this layer as the A layer. Now form over the first layer a second layer of equally bunched spheres, Fig 5 (b), so as to nestle into the voids. It will be clearly seen that once a sphere is placed over a void, it blocks the voids which are adjacent to that void. Let us call this layer as the B layer. Now, it can be clearly seen that there are two types of voids created by the B layer of spheres. If a sphere is placed on the x - type of voids, it would resemble the A layer of spheres in the sense that, it eclipses the spheres of the A layer.
On the other hand, if the spheres were to be placed on the y - type of voids, it would neither eclipse the A layer nor the B layer of spheres. This would clearly be a unique layer. Let us call this layer as the C layer. This arrangement (i.e, ABCABC...) is called the Cubic Close Packing (FCC).
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Hexagonal Primitive Unit Cell : Each corner atom would be common to 6 other unit cells, therefore their contribution to one unit cell would be 1/6. Therefore, the total number of atoms present per unit cell effectively is 6. The height of the unit cell 'c' is 📷 and the length of the unit cell 'a' is 2r. Therefore the area of the base is equal to the area of six equilateral triangles = 📷. The volume of the unit cell = 📷. Therefore the packing fraction = 📷
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Exercise 3: a) What is the coordination number of the atoms arranged in (ABC ABC ABC…) type structure.
b) The void fraction of _______ and H.C.P is same.
Tetrahedral Voids and Octahedral Voids
The close packing system involves two kinds of voids - tetrahedral voids and octahedral voids. The former has four spheres adjacent to it while the latter has six spheres adjacent to it. These voids are only found in either FCC or Hexagonal Primitive unit cells. Let us first consider a FCC unit cell (as shown in the figure). Not all the atoms of the unit cell are shown (for convenience). Let us assume that there is an atom (different from the one that forms the FCC) at the center of an edge. Let it be big enough to touch one of the corner atoms of the FCC. In that case, it can be easily understood that it would also touch six other atoms (as shown) at the same distance. Such voids in an FCC unit cell in which if we place an atom it would be in contact with six spheres at equal distance (in the form of an octahedron) are called octahedral voids.
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On calculation, it can be found out that a FCC unit cell has four octahedral voids effectively. The number of octahedral voids of a unit cell is equal to the effective number of atoms of that unit cell.
Let us again consider a FCC unit cell. If we assume that one of its corners is an origin, we can locate a point having coordinates (¼,¼,¼). If we place an atom (different from the ones that form the FCC) at this point and if it is big enough to touch the corner atom, then it would also touch three other atoms (as shown in the figure) which are at the face centers of all those faces which meet at that corner. Moreover, it would touch all these atoms at the corners of a regular tetrahedron. Such voids are called tetrahedral voids. Since there are eight corners, there are eight tetrahedral voids in a FCC unit cell. The number of tetrahedral voids is double the number of octahedral voids. Therefore, the number of tetrahedral voids in HCP is 12.
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Exercise 4: i) What is the number of octahedral and tetrahedral voids in case of S.C H.C.P and F.C.C?
ii) True of False
Number of tetrahedral voids is a whole number multiple of the number of octahedral void where n is any integer.
Radius Ratio Rules
The structure of many ionic solids can be accounted for by considering the relative sizes of the positive and negative ions, and their relative numbers. Simple geometric calculations allow us to workout as to how many ions of a given size can be in contact with a smaller ion. Thus, we can predict the coordination number from the relative sizes of the ions.
Calculation of Some Limiting Radius Ratio Values
i) Co - ordination number 3 : The adjacent figure shows the smaller positive ion of radius r+ in contact with three larger negative ions of radii r-. It can be seen that AB = BC = AC = 2r-, BE = r- + r+. Further, the angle ABC is 60o, and the angle DBE is 30o. By trigonometry cos 30o = (BE / BD).
BD = (BE / cos30o), r+ + r- = r- / cos30o
= (r- / 0.866) = r- × 1.55, r+ = (1.155 r-) - r-
= 0.155 r-, Hence (r+ / r-) = 0.155.
ii) Co - ordination number 4 (tetrahedron): Angle ABC is the tetrahedral angle of 109o 28' and hence the angle ABD is half of this, that is 54o 44'. In the triangle ABD, sin ABD = 0.8164 = AD / AB = 📷. Taking reciprocals, 📷, rearranging, we get, 📷.
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iii) Co - ordination number 6 (octahedron): A cross section through an octahedral site is shown in the adjacent figure and the smaller positive ion (of radius r+) touches six larger negative ions (of radius r-). (Note that only four negative ions are shown in this section and one is above and one below the plane of the paper). It is obvious that AB = r+ + r- and BD = r-. The angle ABC is 45o in the triangle ABD. cos ABD = 0.7071 = (BD / AB) = 📷. Rearranging, 📷.
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Limiting radius ratio
Co - ordination number
Shape
Example
< 0.155
2
Linear
BeF2
0.155 - 0.225
3
Planar Triangle
-
0.225 - 0.414
4
Tetrahedron
ZnS
0.414 - 0.732
4
Square planar
PtCl42-
0.414 - 0.732
6
Octahedron
NaCl
0.732 - 0.999
8
Body centered cubic
Type
CsCl
Exercise-5: The radius of calcium ion is 94 pm and of an oxide ion is 146 pm. The coordination number of calcium is _____________
Classification Of Ionic Structures
In the following structures, a black circle would denote a cation and a white circle would denote an anion. In any solid of the type AxBy, the ratio of the coordination number of A to that of B would be y : x.
i) Rock Salt Structure : Cl- is forming a FCC unit cell in which Na+ is in the octahedral voids. The coordination number of Na+ is 6 and therefore that of Cl- would also be 6. Moreover, there are 4 Na+ ions and 4 Cl- ions per unit cell. The formula is Na4Cl4 i.e,NaCl. The other substances having this kind of a structure are all halides of alkali metals except cesium halide and all oxides of alkaline earth metals except beryllium oxide.
ii) Zinc Blende Structure (ZnS) : Sulphide ions are face centered and zinc is present in alternate tetrahedral voids. Formula is Zn4S4, i.e, ZnS. Coordination number of Zn is 4 and that of sulphide is also 4. Other substance that exists in this kind of a structure is BeO.
iii) Fluorite structure (CaF2) : Calcium ions are face centered and fluoride ions are present in all the tetrahedral voids. There are four calcium ions and eight fluoride ions per unit cell. Therefore the formula is Ca4F8, (i.e, CaF2). The coordination number of fluoride ions is four (tetrahedral voids) and thus the coordination number of calcium ions is eight. Other substances which exist in this kind of structure are UO2, and ThO2.
v) Antifluorite structure (Li2O) : Oxide ions are face centered and lithium ions are present in all the tetrahedral voids. There are four oxide ions and eight lithium ions per unit cell. As it can be seen, this unit cell is just the reverse of Fluorite structure, in the sense that, the positions of cations and anions is interchanged. Other substances which exist in this kind of a structure are Na2O, K2O and Rb2O.
v) Cesium halide structure (CsCl) : Chloride ions are primitive cubic while the cesium ion occupies the center of the unit cell. There is one chloride ion and one cesium ion per unit cell. Therefore the formula is CsCl. The coordination number of cesium is eight and that of chloride ions is also eight. Other substances which exist in this kind of a structure are all halides of cesium.
📷
📷
Exercise 6: MgO has a structure of NaCl and TlCl has the structure of CsCl. What are the coordination numbers of ions in each?
Answers to Exercises
Exercise 1: One
Exercise 2: (a) 48%, 32%,26%, (b) f.c.c.
Exercise 3: (a) 12, (b) f.c.c.
Exercise 4: (b) false
Exercise 5: 4
Exercise 6: 6, 8
Solved Problems
Subjective
Problem 1: An element ‘X’ (atomic mass 150) having fcc structures has unit cell edge 400 pm. Calculate the density of ‘X’ and the number of unit cell for 15g of X.
Solution: Length of the unit cell edge = 400 pm = 400 ×10–10 cm
Volume of unit cell = (400 × 10–10)3 = 6.4 × 10–23 cm3
Since structure is fcc the number of atoms will be 4
Density = 📷 = 15.56 g/cc
Volume of 15g of X = 📷 = 📷 = 0.9640 cc
No. of unit cells in 0.9640 cm3 = 📷
= 📷 = 1.506 ×1022 unit cells
Problem 2: The compound A2B has ZnS structure. Its density is 3.4 g/cc. What is the edge length of unit cell? (Molecular weight of A = 32, B = 35)
Solution: For ZnS structure, n = 4
Molar mass of A2B (Mm) = 2 × 32 + 35 = 99
ρ = 3.4 g/cc
∴ ρ = 📷
a = 📷
a = 5.78 × 10–8 cm = 5.78Å
Problem 3: The unit cell in a crystal of diamond belongs to a cubic crystal system but doesn’t correspond to the Bravais lattice. The volume of unit cell of diamond is 0.0454 nm3 and the density of diamond is 3.52 g/cc. Find the number of carbon atoms in a unit cell of diamond?
Solution: Atomic mass of carbon = 12 g/mol
Volume of the unit cell of diamond = 0.0454 nm3
Density = 📷
3.52 = 📷
n = 8 atoms/unit cell
Problem 4: Iron occurs as BCC as well as FCC unit cell. If the effective radius of an atom of iron is 124 pm, compute the density of iron in both these structures.
Solution: In a body centered unit cell, atoms touch each other along the cross diagonal. Hence,
📷
for this unit cell, N = 2. Hence,
📷
In a face centered unit cell, atoms touch each other along the face diagonals. Hence,
📷
For this unit cell, N = 4. Hence,
📷
Problem 5: NH4Cl crystallizes in a body centered cubic lattice, with a unit cell distance of 387 pm. Calculate (a) the distance between the oppositely charged ions in the lattice, and (b) the radius of the NH4+ ion if the radius of the Cl- ion is 181 pm.
Solution: a) In a body centered cubic lattice oppositely charged ions touch each other along the cross - diagonal of the cube. Hence, we can write,
📷
Problem 6: KCl crystallizes in the same type of lattice as does NaCl. Given that, 📷, 📷
Calculate (a) the ratio of the side of the unit cell for KCl to that for NaCl, and (b) the ratio of density of NaCl to that for KCl.
Solution: NaCl crystallizes in the face centered cubic unit cell such that 📷 = 📷 , where a is the edge length of unit cell. Now since, 📷, 📷
we will have, 📷
📷, Hence, 📷
📷
Now since, 📷
We will have, 📷
Problem 7: In the cubic solid of CsCl (d = 3.97 g cm-3) the eight corners are occupied by Cl- with a Cs+ at the center and vice versa. Calculate the distance between the neighbouring Cs+ and Cl- ions. What is the radius ratio of the two ions ?
Solution: In a unit cell, there are one Cs+ and one Cl-, i.e, one CsCl ion pair.
Density = 📷
📷
a = 4.13 × 10-8 cm.
a = 4.13📷
For a cube of side lengh 4.13 📷, diagonal = 📷.
As it is a BCC with Cs+ at center (radius r+ ) and Cl- at corners ( radius r-) so,
2r+ + 2r- = 7.15 📷 or r+ + r- = 3.57 📷
that is, distance between neighbouring Cs+ and Cl- = 3.57 📷
Now assume, two Cl- ions touch each other so,
length of unit cell = 2r- = 4.13📷
r- = 2.06, r+ = (3.57 - 2.06) = 1.51 📷
📷
Problem 8: The unit cell cube length for LiCl is 5.14 📷. Assuming anion cation contact, calculate the ionic radius for chloride ion.
Solution: The distance between Li+ and Cl- ion can be derived as half of the edge length of cube.
📷
📷
= 3.63 📷
The radius of Cl-
= 📷
📷
Solution: The distance between Li+ and Cl- ion can be derived as half of the edge length of cube.
📷
Problem 9: In fcc arrangement of A & B atoms, where A atoms are at corners of the unit cell, B atoms at the face-centers, one of the atoms are missing from the corner in each unit cell then find the percentage of void space in the unit cell.
Solution: There are📷A atoms and 3 B atoms per unit cell
Also, 2 rA + 2 rB = 📷
or, a = 📷
Volume of unit cell = a3 = 📷
= 📷
Fraction of volume occupied per unit volume of the unit cell is given by
PF = 📷 = 📷
📷
= 📷 = 📷
= 📷 = 0.570
So, void space = 1 – packing fraction
= 1 – 0.570
= 0.430/unit volume of unit cell
∴percentage of void space = 43%
Problem 10: Prove that the void space percentage in zinc blende structure is 25%.
Solution: Anions are in fcc positions and half of the tetrahedral holes are occupied by cations. There are 4 anions and eight tetrahedral holes per unit cell.
Here, face-diagonal = 📷
4r = 📷
or, a = 📷
r– = radius of anion
r+ = radius of cation
a = edge length of the cell
Volume of unit cell = a3
= 📷
=📷
∴Packing Fraction = 📷 = 📷
Since, for tetrahedral holes
📷
∴PF = 📷
= 0.7496 / unit volume of unit cell
∴void space = 1 – 0.7496
= 0.2504/unit volume of unit cell
∴percentage of void space = 25.04%
≈ 25%
Objective
Problem 1: An ionic compound AB has ZnS type of structure, if the radius A+ is 22.5pm, then the ideal radius of B- is
(A) 54.35pm (B) 100pm
(C) 145.16pm (D) None
Solution: Since ionic compound AB has ZnS type of structure, therefore it has tetrahedral holes, for which
📷 = 0.225
📷 = 0.225
📷 = 0.225
Hence, r– = 100 pm
∴(B)
Problem 2: In a cubic packed structure of mixed oxides, the lattice is made up of oxide ions, one fifth of tetrahedral voids are occupied by divalent (X++) ions, while one-half of the octahedral voids are occupied by trivalent ions (Y+3), then the formula of the oxide is.
(A) XY2O4 (B) X2YO4
(C) X4Y5O10 (D) X5Y4O10
Solution: In ccp anions occupy primitives of the cube while cations occupied voids. In ccp there are two tetrahedral voids and one octahedral holes.
For one oxygen atom there are two tetrahedral holes and one octahedral hole.
Since one fifth of the tetrahedral voids are occupied by divalent cations (X2+)
∴ number of divalent cations in tetrahedral voids = 📷.
Since half of the octahedral voids are occupied by trivalent cations (Y3+)
∴ number of trivalent cations = 📷.
So the formula is the compounds is 📷
or 📷 ,
or X4Y5O10
∴ (C)
Problem 3: If three elements X, Y & Z crystallized in cubic solid lattice with X atoms at corners, Y atoms at cube centre & Z-atoms at the edges, then the formula of the compound is:
(A) XYZ (B) XY3Z
(C) XYZ3 (D) X3YZ
Solution: Atom X is shared by 8 corners
1 atoms of Z is shared by 4 unit cells
Atom Y is present at centre of the unit cell
Hence, effective number of atoms of X per unit cell = 📷 = 1
Effective number of atoms of Z per unit cell = 📷 = 3
Effective number of atoms of Y per unit cell = 1
Hence, the formula of the compound is XYZ3
∴ (C)

Main Engine : Echevarria-Wartsila Diesel
· Main Engine Make : Echevarria-Wartsila Diesel, Type : 8R32D
No. of. Cylinders : 8, Kw : 2960, Bhp : 4026, Rpm : 720, s : 12, Specification No. : 10198, Engine No. : 5085
# Turbocharger Make : ABB, Type : Plate Not Clean
# Governor Make : Woodward
# Oil Mist Detector Make : Visatron, Type : VN 116/87, Sr. No. : 07P-04587
# Turning Gear Make : Katsa Vaid Gear, Type/Model : KV 145C1, Ratio : 272, Sr. No. : 651, Year : 1989
# Main Engine Attach Gearbox Make : Plate Not Clean
# Main Engine Attach Shaft Generator Make : Indar As, Type : LSB-355-L/4, Kva : 600
Volt : 450, Amps : 770, Rpm : 1800, Hz : 60, Weight : 2.16 Ton, Sr. No. : 893316, Year : April-1990
· Main Engine Spares : # Cylinder Liner (02 Pcs) # Cylinder Head (03 Pcs) # Other Spare
Diesel Generators : Echevarria-Wartsila Diesel (02 Pcs)
· Diesel Generators Make : Echevarria-Wartsila Diesel, Type : 4R22HFC (02 Pcs)
No. of. Cylinders : 6, Kw : 560, Bhp : 760, s : 15, Rpm : 900, Specification No. : 17285, Sr. No. : 5032/5033
# D.G. Turbocharger Make : BBC, Type : VTR-184-11 (02 Pcs), Sr. No. : HT 389083/HT 392259
# D.G. Governor Make : Woodward, Type : UG-8 (02 Pcs)
Part No. : 8524-708, Rpm : 760-1560, Sr. No. : 2378312/2378316
# Diesel Generator Alternator Make : Indar As, Type : LSB-450-M/8 (02 Pcs), Kva : 600
Volt : 450, Amps : 770, Rpm : 900, Hz : 60, Weight : 3.92 Ton, Sr. No. : 893314/893315, Year : May-1990
· Diesel Generators Spares Details : # Cylinder Head (03 Pcs) # Governor (01 Pcs) # Fuel Pump (02 Pcs) # Other Spare
Emergency Diesel Generators : Deutz MWM
· Emergency Diesel Generators Make : Deutz MWM, Type : TBD 226-6
Kw : 87.0/90.5/95.7, Rpm : 1785/1800, Sr. No. : 226.62.97576
# Emergency Diesel Generators Alternator Make : Indar As, Type : LSB-225-M/4, Kva : 87.5
Volt : 450, Amps : 112, Rpm : 1800, Hz : 60, Weight : 0.53 Ton, Sr. No. : 893317, Year : May-1990
Oil Purifiers (Oil Filter) : Alfa Laval (05 Pcs)
· L.O. Purifiers (Oil Filter) Make : Alfa Laval, Type : MMPX-304 SGP-11-60 (02 Pcs)
Speed : 9510 Rpm, Sr. No. : 4056978/4056979
# L.O. Purifiers (Oil Filter) EPC Penal : EPC-41 (02 Pcs)
· F.O. Purifiers (Oil Filter) Make : Alfa Laval, Type : FOPX-605 TFD-24-60 (02 Pcs)
Worm Wheel Shaft : 1700-1800 Rpm, Revolution Counter : 142-150 Rpm, Sr. No. : 4056976/4056977, Year : 1990
# F.O. Purifiers (Oil Filter) Penal : EPC-400 (02 Pcs)
· Oil Purifiers (Oil Filter) Make : Alfa Laval, Type : MAB-103 B-24 (01 Pcs), Max. Speed (Bowl) : 8600 Rpm, Speed Motor Shaft : 1800 Rpm, Req. Motor Power : 0.75 Kw, Hz : 60, Sr. No. : 4198728, Year : 2011
Fresh Water Sterilizer : Jowa
· Fresh Water Sterilizer Make : Jowa, Type/Model : No Plate
Oily Water Separators : Facet Iberica S.A.
· Oily Water Separators Make : Facet Iberica S.A., Model No. : 1-OWS-1/4.4/15
Flow Rate. : 1 M3/H, Design. Press. : 0.1 Kg/Cm2, Sr. No. : 3422-91159, Year : 1990
# Oily Water Separators Penal Make : Jowa Ab, Type/Model : JOWA M-87
Air Compressor, Gas Comp., Emergency Air Comp. (With Engine), Breathing Air Comp., Air Comp. (With Tank) & Air Dryer
· Air Compressor Make : Hatlapa, Type : L-50 (01 Pcs)
Cap. : 40 Cfm/68 M3/Hr., Pressure : 114.4 Psi/8 Bar, Rpm : 1750, Power Req. : 9.8 Kw, Sr. No. : 41978, Year : 1990
# Air Compressor Ele. Motor Make : Rotor, Type : XKF160104, Kw : 11, Volt : 440, Rpm : 1740, Amps : 20, Hz : 60
· Air Compressor Make : Hatlapa, Type : W-55 (02, Plate Not Clean) # Air Compressor Ele. Motor Make : Abb, Type : MBT 180
Kw : , Hp : 15, Volt : 440, Amps : 20, Rpm : 1160, Hz : 60 Sr. No. : L010298015/1
# Air Compressor Ele. Motor Make : Siemens, Type : 1LA2186-6AA60
Kw : 16/18, Volt : 400/460/690, Amps : 30.5/31.5, Rpm : 975/1175, Hz : 50/60 Sr. No. : 9202341/0199
· Air Compressor Make : Ingersoll Rand, Type : WA-1-IHE-N-30 (01, Plate Not Clean)
# Air Compressor Ele. Motor Make : Plate Not Clean
· Gas Cargo Compressor Make : Sulzer Burckhardt, Type : 2K 105-2F (03 Pcs)
Gas : LPG/NH3/VCM, Speed : 710 Rpm, Sr. No. : 6409/6410/6411, Year : 1990
# Gas Cargo Compressor Ele. Motor Make : AEG, Type : AM 355MD-10 (03 Pcs)
Kw : 150, Volt : 440, Rpm : 715, Amps : 290, Hz : 60, Weight : 1.75 Ton, Sr. No. : 51106167/, Year : 1990
· Emergency Air Compressor (With Engine) Make : Puska, Type/Model : Plate Not Clean
# Emergency Air Compressor's Engine Make : Plate Not Clean
· Air Compressor (With Tank) Make : Puska, Model : N-1050-2-500
Motor Power : Kw-5.5 Hp-7.5, Rpm : 740, Pressure : Bar-10 Psi-145, Sr. No. : 20203031
# Air Compressor (With Tank) Ele. Motor Make : Weg-Puska, Type/Model : 132S-2, Sr. No. : BC11786
Kw : 5.5/6.3, Hz : 50/60, Rpm : 2930/2935/2945/3515/3530, Volt : 380/400/415/440/480/660/690, Amps : 5.97/10.7
· Breathing Air Compressor Make : Poseidon Kompressoren, Type : 1/100, Rpm : 2300, Kw : 2.2, Year : 1991
· Air Dryer Make : Airsec, Model : HD-OC/E, Flow. : 25 NM3/Hr., Pressure : 7 Kg/Cm2, Sr. No. : 8887-90
Chilling Compressor & Air Condition Unit
· Chilling Compressor Make : York (02 Pcs), Type/Model : Plate Not Clean
· Air Condition Unit : 01 Pcs
Plate Heat Exchanger : Alfa Laval (06 Pcs)
· Plate Heat Exchanger Make : Alfa Laval, Type : M10-BFM (06 Pcs)
Sr. No. : MN 1997/MN 1998/MN 1999/MN 2001, Year : 1990
Hydraulic Deck Winch : Hydraulik Brattvaag (04 Pcs)
· Hydraulic Windlass Anchor Winch Make : Hydraulik Brattvaag, Type : MG-6300 (02 Pcs), Sr. No. : 90097/90098
· Hydraulic Deck Mooring Winch Make : Hydraulik Brattvaag, Type : WM-22020 (02 Pcs), Sr. No. : 90099/
Steering Gear, Steering Gear Room's Hydraulic Pump & Hydraulic Unit
· Steering Gear Make : Tenfjord, Type : 18M-230, Sr. No. : 11362, Year : 1990
· Steering Gear Room's Hydraulic Pump Make : Leietritz, Type : L3MG-52/104 IHOKI-W (04 Pcs), Sr. No. : 67050.001/
· Hydraulic Unit : 01 Pcs
Over Head Crane (Engine Room), Provision (Lifeboat) Deck Crane & Cargo Hose Handling Deck Crane
· Over Head Crane (Engine Room) : 01 Pcs
· Provision Deck Crane : 01 Pcs, Cap. : SWL 2.1 Ton
· Provision (Lifeboat) Deck Crane : 01 Pcs, Cap. : SWL 4 Ton-10.5M
· Cargo Hose Handling Deck Crane : 01 Pcs, Cap. : SWL 3 Ton-5.5M
All Pumps (Oil & Water Pump)
· All Pumps (Oil & Water Pump) : Bombas Azcue S.A. & Itur (All Most Pump Plate Not Clean)
# Fire Pump Make : Bombas Azcue S.A., Type : COMEP 80/46, Cap. : 90 M3/Hr., Sr. No. : 162428
Workshop Machinery
· Over Head Crane (Eng. Room) : 01 Pcs
· Lathe Machine Make : Pinacho, Model : L 1/260
· Drilling Machine Make : Ibarmia, Type/Model : S-25/32, Sr. No. : 1333
· Grading Machine Make : Letag, Type/Model : Plate Not Clean
· Wielding Machine Make : Unitor, Type/Model : UWT-330
· Chain Block : 06 Pcs
Safety & Life Saving Equipment
· Life Raft Make : Astemar, Type : LR07L (02 Pcs), Cap. : 20 Person, Make Year : 08-2011
· Free Fall Life Boat : 01 Pcs, Cap. : 18 Person
· Speed (Rescue) Boat : 01 Pcs, Cap. : 6 Person
# Rescue Boat Davit : 01 Pcs, Cap. : SWL 1.5 Ton
# Speed Boat Engine Make : Tohatsu
· Other Equipment : Fire Extinguisher, Life Jacket, Immersion Suit, Fire Hose Pipe & Etc.
Deck Machinery & Other Equipment
· Ship Anchor : 02 Pcs
· Ship Anchor Chain Dai. : 37/38 MM (Approx.)
· Bow Thruster Make : Kamewa
# Bow Thruster Ele. Motor Make : Alconza S.A., Type : DRV-315-S-4
Volt : 440, Kw : 84, Rpm : 767, Amps : 296, Sr. No. : 1.892.317, Year : 1990
· Co2 Analyzer Make : Smit Ovens
· Inert Gas System Make : Smit Ovens, Type : No Plate
# Inert Gas System Blower Make : Holmes Blowers Europe, Type : Plate Not Clean
· Rope Pilot Ladder : 02 Pcs, Material : Rope & Wood
· Accommodation Ladder (Gangway) : 02 Pcs, Material : Aluminum
· Other Item : Rope, Wire Rope, Sewage Treatment Plant, Marine Paint, Boiler, Ship Bell & Etc.
Hydro Marine Power completes requirement of OEM products with instant availability at very low prices which is essential opportunity for all the Vessels who are in need. We take care of all the working materials by testing and servicing them as required. The material is later stocked and supplied. We are providers of “Perfect Machinery at Competitive Pricing in Minimum Time”.
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Contact us for any queries, we’d be happy to help you!
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Hello family, would you like some new bass music?

Singles

• Sam King - Dumb Down (feat. HoodLit)
• Yakz - Volgr
• Oddprophet - Flex
• Kayzo - Untouchable (feat. Brennan Heart)
• Riot Ten & Bear Grillz - Run It (feat. Bok Nero)
• PRZM - Circus Freak (feat. INF1N1TE)
• Dirt Monkey - Power of People (feat. Amp Live)
• Mersiv - Bermuda's Triangle
• Merlin - Cyclops
• Jiqui - The Hunt
• STUCA - Bust Thru
• Versa - Bluetooth

Albums / EPs

• Cherney - Deep State EP
• Gentlemens Club - Bones
• Nazaar - Overclocked EP
• Hukae - Future EP
• Donkong - Breathing Ones
• Wood x Rith Banney - Breath EP

Other News

• Halcyon is teaming together with Space Yacht for the first-ever Halcyon Showcase Event, with all donations going towards Yakz's medical bills (he has a life-threatening gum disease).
• No Parking On The Dance Floor is happening tonight, in King's Mountain, NC. Ace Aura, Dirt Monkey, and Subtronics are playing, and I will be there, if anyone else is! I'll try to share IDs, if I can catch any on video.

Did I miss anything? Provide new music (from this week) in the comments below, so that this thread can be updated. As always, last week's New Music Friday post is available here.
Be sure to follow the Spotify dubstep NMF playlist, refreshed every week. Or, if you prefer something a little more hand-curated, try wubly.
🖤

Keybase proof

I hereby claim:

• I am andrewjfrancis on reddit.
• I am andrewjfrancis on keybase.
• I have a public key whose fingerprint is DA33 9E15 6EBC 767B 1646 6B88 6230 84ED 1FE9 9854

To claim this, I am signing this object:

{ "body": { "key": { "eldest_kid": "0101bd9f46d2c69f4e0b067c50d5d4974c6326579502c38c9f947f3e496f3dd4a6530a", "fingerprint": "da339e156ebc767b16466b88623084ed1fe99854", "host": "keybase.io", "key_id": "623084ed1fe99854", "kid": "0101bd9f46d2c69f4e0b067c50d5d4974c6326579502c38c9f947f3e496f3dd4a6530a", "uid": "bb2fff278144164f3f2b764ec1073e19", "username": "andrewjfrancis" }, "service": { "name": "reddit", "username": "andrewjfrancis" }, "type": "web_service_binding", "version": 1 }, "ctime": 1446583153, "expire_in": 157680000, "prev": "42b3ec771d828b6ddef363d9debd6fda1e4359a8d35209c6fd4dd4b1078944a6", "seqno": 10, "tag": "signature" } 

with the key from above, yielding:

-----BEGIN PGP MESSAGE----- Version: Keybase OpenPGP v2.0.47 Comment: https://keybase.io/crypto yMIUAnicrVJNSFRRFB4rDe0XyqA0iCe1iEnee/e++96VFkVEFkr2g5WJw7vvnjs+ R9+Mb8aZxEZdtOmHVhkF0c+isKKCJAuz0LIWGRVYFGFQSGmFRS3KTdkdqV3Qprs5 3HO+7+M7H2dgzvRAXtarYPb6h8/6CrMG+080BSppQWOLwqK8WSlpUSIwVaCeQzwR irhcKVFUTdUYpwITrjtEVlCZSkzHULnBMTWxQ5BODJMaqu4gy6GCYlMgwJQIxDm2 iYFUWwkqwvXC4Md810tIWW4jREEzCDDHJCbTCCaEWRbRkWph4JoASi0DS2JtNJ5h SHPMjkOxG5U9+QlN2fsL/j/7bpqSY0wXQuimpWEsvQokdGYSDI6mmgg0mgHGwffs BpBo2+M+pOqEb3uOG1fSQUXOkq4DmXh/Y3zg3E38i5dojmUGKWCh3xIh5npcZimZ SfDjbtRTSjSJdBJuRkP6I4aFNAMFFdgTc30IuRmEYRJLlS+oxHxISkmsMwSOaWrc 0i1GOAeBCOKUA+NEcFsDjAxqWxwZukod2cIyFib3tSiW8SiZpRq9qNSWogk7LDXj btizE00+KOk7fdUzAll5gZzsaZkjC+Tlzv9zevllMyfh1NJVN8NlscHOoQsgNm3/ 9GNfV2/Lyobx2rLix0fmbUdns0sPl5t2zbbr6YuDWF/xdv+Z5POi+wU5xeNHjrZF dnfsKBzLqZo4XVmeHH6xuXASLtOF3052dTxI9Z7pWrYrVj3RNFRx6OB4Ts2yVGvn xyXdzemN18pHKgf6N0DPzrsj72/9vLEFnar6AJuuvts/NjlLizzpeXk8MnCv6GBp x+i5etF7vsJvO72z6vWVuaPfi82P61Y/aV/Q3d7dkPt5K3ramE4tnjZj79XB2UUX xJv82PBteunL3pKNLV9HD5SurZ0ocPtbzXlna21r26JSVrGGxjpDx5zlzsNHReG2 ZN0vGSZAZg== =Wy7f -----END PGP MESSAGE----- 

Finally, I am proving my reddit account by posting it in /KeybaseProofs

Descriptions: 

Extra Info: