Thomsenolite
Thomsenolite | |
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![]() Thomsenolite (obelisks) and some pseudocubic (picture center) | |
General | |
Category | Halide minerals |
Formula (repeating unit) | NaCaAlF6·H2O |
Strunz classification | 3.CB.40 |
Crystal system | Monoclinic |
Crystal class | Prismatic (2/m) (same H-M symbol) |
Space group | P21/b |
Identification | |
Color | Colourless, white, pale lilac; brownish or reddish tinted due to staining; colourless in transmitted light. |
Cleavage | Perfect On {001}; {110} distinct. |
Fracture | Irregular/ uneven |
Tenacity | Brittle |
Mohs scale hardness | 2 |
Lustre | 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[]
Categories:
- Sodium minerals
- Calcium minerals
- Aluminium minerals
- Fluorine minerals
- Monoclinic minerals
- Minerals in space group 14
- Halide mineral stubs