Alumohydrocalcite
From Wikipedia, the free encyclopedia
CategoryMinerals
FormulaCaAl2(CO3)2(OH)4·4H2O
IMA symbolAhcal
ColorChalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in Cr-bearing varieties
| Alumohydrocalcite | |
|---|---|
 Alumohydrocalcite found on Mount Hamilton in California | |
| General | |
| Category | Minerals |
| Formula | 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]
