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Cryolithionite

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Formula:
Na3Li3[AlF6]2
System:
Isometric
Colour:
Colourless, white
Lustre:
Vitreous
Hardness:
2½ - 3
Name:
In allusion to its resemblance to CRYOLite and the LITHIum content.
This page provides mineralogical data about Cryolithionite.

Classification of Cryolithionite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
3.CB.05

3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
11.6.4.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
8.6.4

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
6 : Halides of Al
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Type Occurrence of Cryolithionite

Year of Discovery:
1904
Associated Minerals at Type Locality:

Physical Properties of Cryolithionite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, white
Hardness (Mohs):
2½ - 3
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {011}.
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
2.77 g/cm3 (Measured)    2.772 g/cm3 (Calculated)

Crystallography of Cryolithionite

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Ia3d
Cell Parameters:
a = 12.12Å
Unit Cell Volume:
V 1,780.36 ų (Calculated from Unit Cell)
Morphology:
Crystals dodecahedral, modified by {112} (Urals). Artificial crystals cubic. Crystals to 17cm. (Ivigtut).

Crystallographic forms of Cryolithionite

Crystal Atlas:
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Cryolithionite no.2 - Goldschmidt (1913-1926)
Cryolithionite no.3 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Optical Data of Cryolithionite

Type:
Isotropic

Chemical Properties of Cryolithionite

Formula:
Na3Li3[AlF6]2
Essential elements:
All elements listed in formula:

Relationship of Cryolithionite to other Species

Chemically related to group(s):
3.CB.15CryoliteNa3[AlF6]
3.CB.15ElpasoliteNaK2[AlF6]
3.CB.15SimmonsiteNa2Li[AlF6]
3.CB.20ColquiriiteCaLi[AlF6]
3.CB.25WeberiteNa2Mg[AlF6]F
3.CB.30KarasugiteSrCa[Al(F,OH)7]
3.CB.35UsoviteBa2CaMgAl2F14
3.CB.40PachnoliteNaCa[AlF6] · H2O
3.CB.40ThomsenoliteNaCa[AlF6] · H2O
3.CB.45CarlhintzeiteCa2[AlF6]F · H2O
3.CB.50YaroslaviteCa3Al2F10(OH)2 · H2O
8.6.1ZharchikhiteAlF(OH)2
8.6.2ChloraluminiteAlCl3 · 6H2O
8.6.3CadwaladeriteAlCl(OH)2 · 4H2O
8.6.5CryoliteNa3[AlF6]
8.6.6ChioliteNa5Al3F14
8.6.7ElpasoliteNaK2[AlF6]
8.6.8WeberiteNa2Mg[AlF6]F
8.6.9Ralstonite Na0.5(Al,Mg)2(F,OH)6•H2O
8.6.10KoeneniteNa4Mg9Al4Cl12(OH)22
8.6.11 Chlor-manasseiteMgxAl(OH)2x+2Cl · (x-0.8)H2O x about 1.75
8.6.12GearksutiteCa[Al(F,OH)5(H2O)]
8.6.13ProsopiteCaAl2(F,OH)8
8.6.14YaroslaviteCa3Al2F10(OH)2 · H2O
8.6.15CarlhintzeiteCa2[AlF6]F · H2O
8.6.16ColquiriiteCaLi[AlF6]
8.6.17ThomsenoliteNaCa[AlF6] · H2O
8.6.18PachnoliteNaCa[AlF6] · H2O
8.6.19Zirklerite(Fe,Mg,Ca)9Al4Cl18(OH)12 · 14H2O (?)

Other Names for Cryolithionite

Name in Other Languages:

Other Information

Thermal Behaviour:
Melting Point = 710°.
Other Information:
Slightly soluble in water. Soluble in sulfuric acid, with generation of HF.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cryolithionite

Reference List:
Ussing (1904) Kongelige Danske Videnskabernes Selskab, Copenhagen, Overs.: 1.

Bøggild (1913) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 51: 600.

Menzer (1930) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 75: 265.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 99-100.

American Mineralogist (1971): 56: 18-23.

Internet Links for Cryolithionite

Localities for Cryolithionite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Greenland (TL)
 
  • Sermersooq
    • Arsuk Fjord
      • Ivittuut (Ivigtut)
Overs. K. D. (1904) Vid. Selsk. Forh.: 1: 3; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 99, 112.; Petersen, O. V and K Secher (1993) The Minerals of Greenland. Mineralogical Record 24:36
Russia
 
  • Urals Region
    • Southern Urals
      • Bashkortostan Republic (Bashkiria Republic)
        • Beloretsk district
          • Ishlya
Крупенин М.Т., Прохаска В., Ронкин Ю.Л. Природа фтора и рудообразующих растворов флюоритового месторождения Суран (Башкирский мегантиклинорий) по данным изучения лантаноидов, флюидных включений и Sr-Nd систематики // Литосфера, 2012, № 5, стр. 126–144
      • Chelyabinsk Oblast'
        • Ilmen Mts
          • Ilmen Natural Reserve
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
USA
 
  • Nevada
    • Mineral Co.
      • Fitting District
        • Gillis Range
Mineralogical Record: 31: 204.
Mineral and/or Locality  
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