Mineral Information and Data:

Monohydrocalcite
CaCO3 • H2O [CNMNC approved formula]

Named for its calcite composition with one molecule of water.

IMA status : Valid species (Pre-IMA 1964) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
15.01.03.01  
  (15) Hydrated Carbonates
  (15.01) where A+ (XO3) · x(H2O)
  (15.01.03)
  
Nickel-Strunz
(10th edition) :
05.CB.20
  (05) Carbonates and Nitrates
  (05.C) Carbonates without Additional Anions, with H2O
  (05.CB) With large cations (alkali and alkali-earth carbonates)
  
Crystal system: Trigonal System
Point group (H-M): 32 — trapezoidal
  
  
  
Other Properties: BioMineral.

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