Alumohydrocalcite

Alumohydrocalcite
Alumohydrocalcite found on Mount Hamilton in California
General
CategoryMinerals
FormulaCaAl2(CO3)2(OH)4·4H2O
IMA symbolAhcal
Identification
ColorChalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in Cr-bearing varieties
TenacityBrittle
Mohs scale hardness2.5
DiaphaneityTransparent, Translucent, Opaque
Specific gravity2.21 - 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]

References

  1. ^ 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.
  2. ^ Alumohydrocalcite Archived 2019-04-06 at the Wayback Machine on mindat.org
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