File:816-_Ivigtut_-_cryolite.jpg · Wikimedia Commons · See Wikimedia Commons
کریولیت
Sign in to saveCryolite (Na3AlF6, sodium hexafluoroaluminate) is a rare mineral identified with the once-large deposit at Ivittuut on the southwest coast of Greenland, mined commercially until 1987.
Key facts
- Mineral.other
- Weakly thermoluminescent. Small clear fragments become nearly invisible when placed in water, since its refractive index is close to that of water. May fluoresce intense yellow under SWUV, with yellow phosphorescence, and pale yellow phosphorescence under LWUV. Not radioactive.
- Mineral.name
- Cryolite
- Mineral.category
- Halide mineral
- Mineral.boxwidth
- 24
- Mineral.image
- 816- Ivigtut - cryolite.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Cryolite from Ivittuut, Greenland
- Mineral.formula
- Na3AlF6
- Mineral.molweight
- 209.9 g mol−1
- Mineral.IMAsymbol
- Crl
- Mineral.strunz
- 3.CB.15
- Mineral.dana
- 11.6.1.1
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.symmetry
- P21/n
- Mineral.unit cell
- a = 7.7564(3) Å, b = 5.5959(2) Å, c = 5.4024(2) Å; β = 90.18°; Z = 2
- Mineral.color
- Colorless to white, also brownish, reddish and rarely black
- Mineral.habit
- Usually massive, coarsely granular. The rare crystals are equant and pseudocubic.
via Wikipedia infobox
Wikidata facts
- Has part
- sodium hexafluoroaluminate
- Named after
- stone
- Image
- 816- Ivigtut - cryolite.jpg
Show 10 more facts
- Commons category
- Cryolite
- chemical formula
- Na₃AlF₆
- Nickel-Strunz 9th edition (updated 2009)
- 3.CB.15
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 3.CB.15
- Strunz 8th edition (series ID, updated)
- III/B.03
- streak color
- white
- crystal system
- monoclinic crystal system
- IMA Mineral Symbol
- Crl
- 2022 Harmonized System Code
- 282630
- different from
- sodium hexafluoroaluminate
Sources (3)
via Wikidata · CC0