Altisite | |
---|---|
General | |
Category | Mineral |
Formula (repeating unit) | Na3K6Ti2Al2Si8O26Cl3 |
IMA symbol | Ati |
Identification | |
Color | Colourless |
Cleavage | None Observed |
Fracture | Conchoidal |
Mohs scale hardness | 6 |
Luster | Vitreous |
Streak | White |
Specific gravity | 2.64 |
Altisite ( IMA symbol: Ati [1]) is an exceedingly rare alkaline titanium aluminosilicate chloride mineral with formula Na3K6Ti2Al2Si8O26Cl3, from alkaline pegmatites. It is named after its composition (ALuminium, TItanium, and SIlicon). [2] [3] [4]
The mineral crystallizes in the monoclinic crystal system with space group C2/m. [2]