Mineralogy Database

Monohydrocalcite Mineral Data

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General Monohydrocalcite Information

Help on Chemical  Formula: Chemical Formula: CaCO3•(H2O)
Help on Composition: Composition: Molecular Weight = 118.10 gm
   Calcium   33.93 %  Ca   47.48 % CaO
   Hydrogen   1.71 %  H    15.25 % H2O
   Carbon    10.17 %  C    37.26 % CO2
   Oxygen    54.19 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca(CO3)•(H2O)
Help on Environment: Environment: Saline deposits in arid regions. Precipitates in the air scrubbers of air-conditioning plants.
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Lake Issyk-Kul, Kirgizia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its calcite composition with one molecule of water.
Help on Name Pronunciation: Name Pronunciation: Monohydrocalcite + Pronunciation Say MONOHYDROCALCITE
Help on Synonym: Synonym: Hydrocalcite
  ICSD 200820
  PDF 29-306

Monohydrocalcite Image

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Comments: Gray to pale blue, due to copper staining, botryoidal monohydrocalcite crust.
Location: 40' level, Saint Pierre Mine, Sainte-Marie-aux-Mines, Vosges Mountains, Haute-Rhin, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Monohydrocalcite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.71673
Help on Cell Dimensions: Cell Dimensions: a = 10.566, c = 7.573, Z = 9; V = 732.18 Den(Calc)= 2.41
Help on Crystal System: Crystal System: Trigonal - Trapezohedral H-M Symbol (3 2) Space Group: P 3112
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.33(1), 3.08(0.8), 1.931(0.6),2.17(0.6), 2.83(0.5), 2.38(0.4), 2.28(0.4), 1.945(0.3),

Physical Properties of Monohydrocalcite

Help on Color: Color: Gray, Gray white, White, Light blue, Light green.
Help on Density: Density: 2.38
Help on Habit: Habit: Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luminescence: Luminescence: Fluorescent, Short UV=vivid green, Long UV=green.
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white

Optical Properties of Monohydrocalcite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2355,KPDmeas= 0.2384,KC= 0.2302
Ncalc = 1.55
Help on Optical Data: Optical Data: Uniaxial (+), w=1.545, e=1.59, bire=0.0450.

Calculated Properties of Monohydrocalcite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.45 gm/cc
note: Specific Gravity of Monohydrocalcite =2.41 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0018394832
Boson Index = 0.9981605168
Help on Photoelectric: Photoelectric: PEMonohydrocalcite = 4.28 barns/electron
U=PEMonohydrocalcite x rElectron Density= 10.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Monohydrocalcite is Not Radioactive

Monohydrocalcite Classification

Help on  Dana Class: Dana Class: (15)Hydrated Carbonates
  (15.01)where A+ (XO3) � x(H2O)
  (15.01.03)Dana Group Monohydrocalcite CaCO3•(H2O) P 3112 3 2
Help on  Strunz Class: Strunz Class: 05.CB.20 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CB -With large cations (alkali and alkali-earth carbonates)
05.CB.20 Monohydrocalcite CaCO3•(H2O) P 3112 3 2

Other Monohydrocalcite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8;Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Monohydrocalcite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 05.CB.20





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