Alumohydrocalcite | |
---|---|
General | |
Category | Mineral |
Formula (repeating unit) | CaAl2(CO3)2(OH)4·4H2O |
IMA symbol | Ahcal |
Identification | |
Color | Chalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in Cr-bearing varieties |
Tenacity | Brittle |
Mohs scale hardness | 2.5 |
Diaphaneity | Transparent, Translucent, Opaque |
Specific gravity | 2.21 - 2.24 |
Alumohydrocalcite (IMA symbol: Ahcal[1]) is a calcium aluminium carbonate mineral with the chemical formula CaAl2(CO3)2(OH)4·4H2O. Its type locality is Khakassia, Russia.[2]