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

Environment:

Granite pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1904

Locality:

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

Name Origin:

Named for its similarity to CRYOlite and high LITHIum content.

Synonym:

ICSD 9923

PDF 22-416

Cryolithionite Image

Images:

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 - Hexoctahedral H-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:

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Forms: ( 2 1 1)

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Physical Properties of Cryolithionite

Cleavage:

{???} Good, {???} Good, {???} Good

Color:

Colorless, White.

Density:

2.78

Diaphaneity:

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

Optical Data:

Isotropic, n=1.34.

Calculated Properties of Cryolithionite

Electron Density:

Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Cryolithionite =2.77 gm/cc.

Fermion Index:

Fermion Index = 0.0042011644
Boson Index = 0.9957988356

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cryolithionite is Not Radioactive

Cryolithionite Classification

Dana Class:

11.06.04.01 (11)Halide Complexes; Alumino-fluorides

(11.06)with miscellaneous formulae

(11.06.04)Dana Group

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

Strunz Class:

03.CB.05 03 - HALIDES

03.C - Complex Halides

03.CB -Neso-aluminofluorides

03.CB.05 Cryolithionite Na3Li3Al2F12 I a3d 4/m 3 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Cryolithionite

Na3Li3Al2F12
Dana No: 11.06.04.01 Strunz No: 03.CB.05
Locality:

Notes:

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