Cryolithionite Mineral Data

Cryolithionite Mineral Data

General Cryolithionite Information

Chemical Formula:

Na3Li3Al2F12

Composition:

Molecular Weight = 371.74 gm

Sodium 18.55 % Na 25.01 % Na₂O

Lithium 5.60 % Li 12.06 % Li₂O

Aluminum 14.52 % Al 27.43 % Al₂O₃

Fluorine 61.33 % F 61.33 % F

- % F -25.82 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₃Li₃Al₂F₁₂

IMA Status:

Valid Species (Pre-IMA) 1904

Locality:

Ivigtut and Arksukfiord, West Greenland. Link to MinDat.org Location Data.

Synonym:

ICSD 9923

PDF 22-416

Cryolithionite Image

Images:

Click Here for Larger Cryolithionite Image

Cryolithionite Cryolite

Comments: White translucent crystalline cryolithionite in brown cryolite.
Location: Ivigtut, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cryolithionite Crystallography

Cell Dimensions:

a = 12.125, Z = 8; V = 1,782.56 Den(Calc)= 2.77

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I a3d

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.96(1), 2.21(0.8), 4.29(0.8),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 2 1 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Geller S , American Mineralogist , 56 (1971) p.18-23, Refinement of the crystal structure of cryolithionite, {Na3}[Al2](Li3)F12

Physical Properties of Cryolithionite

Cleavage:

[???] Good, [???] Good, [???] Good

Color:

Colorless, White.

Density:

2.78

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Cryolithionite

Gladstone-Dale:

CI meas= 0.281 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.279 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1227,KPDmeas= 0.1223,KC= 0.1701

Optical Data:

Isotropic, n=1.34.

Calculated Properties of Cryolithionite

Electron Density:

r_electron=2.62 gm/cc
note: r_{Cryolithionite}=2.77 gm/cc.

Fermion Index

Fermion Index = 0.0042
Boson Index = 0.9958

Photoelectric:

PE_{Cryolithionite}= 1.06 barns/electron
U=PE_{Cryolithionite} x r_electron= 2.78 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cryolithionite is Not Radioactive

Cryolithionite Classification

Dana Class:

11.6.4.1 (11)Halide Complexes; Alumino-fluorides

(11.6)with miscellaneous formulae

(11.6.4)Dana Group

11.6.4.1 Cryolithionite Na3Li3Al2F12 I a3d 4/m 3 2/m

Strunz Class:

III/B.03-10 III - Halogenides

III/B - Double halogenides without water, with [BF4]1-,[SiF6]2- and [AlF6]3-

III/B.03 - Kryolithionite - Calcjarlite series

III/B.03-10 Cryolithionite Na3Li3Al2F12 I a3d 4/m 3 2/m

III/B.03-20 Colquiriite CaLiAlF6 P 3c 3 2/m

III/B.03-25 Simmonsite! Na2LiAlF6 P 2₁/n 2/m

III/B.03-30 Cryolite Na3AlF6 P 2₁/n 2/m

III/B.03-40 Elpasolite K2NaAlF6 F m3m 4/m 3 2/m

III/B.03-45 Bogvadite Na2SrBa2Al4F20 Pnmn,Pn2n Ortho

III/B.03-48 Jorgensenite! Na2(Sr,Ba)14Na2Al12F64(OH,F) C 2/m 2/m

III/B.03-50 Jarlite Na(Sr,Na,[])7(Mg,[])Al6F32(OH,H2O)2 C 2/m 2/m

III/B.03-60 Calcjarlite Na(Ca,Sr)3Al3(F,OH)16 C 2/m 2/m

Other Cryolithionite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Cryolithionite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST 12 -École des Mines de Paris

Search for Cryolithionite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Cryolithionite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Cryolithionite Mineral Data :

Ask about Cryolithionite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Cryolithionite Specimen Label here :

Cryolithionite

Na3Li3Al2F12
Dana No: 11.6.4.1 Strunz No: III/B.03-10
Locality:

Notes: