Alumohydrocalcite
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]
| Alumohydrocalcite | |
|---|---|
 Alumohydrocalcite found on Mount Hamilton in California | |
| 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 |
References
- Warr, L.N. (2021). "IMA-CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- Alumohydrocalcite Archived 2019-04-06 at the Wayback Machine on mindat.org
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External links
- Alumohydrocalcite data sheet
- Alumohydrocalcite on the Handbook of Minerals
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