Thomsenolite
From Infogalactic: the planetary knowledge core
Thomsenolite | |
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Thomsenolite (obelisks) and some pseudocubic ralstonite (picture center)
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General | |
Category | Halide minerals |
Formula (repeating unit) |
NaCaAlF6·H2O |
Strunz classification | 03.CB.40 |
Identification | |
Color | Colourless, white, pale lilac; brownish or reddish tinted due to staining; colourless in transmitted light. |
Crystal system | Monoclinic |
Cleavage | Perfect On {001}; {110} distinct. |
Fracture | Irregular/ uneven |
Tenacity | Brittle |
Mohs scale hardness | 2 |
Luster | Vitreous, pearly |
Streak | White |
Diaphaneity | Transparent, translucent |
Density | 2.981 g/cm3 |
Thomsenolite is a mineral with formula: NaCaAlF6·H2O. It is an alteration product of cryolite.[1]
It was discovered in 1868 in Ivigtut, Greenland and named for Hans Peter Jorgen Julius Thomsen (1826–1909).[2]
References
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