Monohydrocalcite Mineral Data

Monohydrocalcite Mineral Data +

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General Monohydrocalcite Information

Chemical Formula:

CaCO3·(H2O)

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

Empirical Formula:

Ca(CO₃)·(H₂O)

Environment:

Saline deposits in arid regions. Precipitates in the air scrubbers of air-conditioning plants.

IMA Status:

Approved IMA 1964

Locality:

Lake Issyk-Kul, Kirgizia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for its calcite composition with one molecule of water.

Synonym:

ICSD 200820

PDF 29-306

Monohydrocalcite Image

Images:

Monohydrocalcite

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

Axial Ratios:

a:c = 1:0.71673

Cell Dimensions:

a = 10.566, c = 7.573, Z = 9; V = 732.18 Den(Calc)= 2.41

Crystal System:

Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3₁12

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Color:

Gray, Gray white, White, Light blue, Light green.

Density:

2.38

Habit:

Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Hardness:

2-3 - Gypsum-Calcite

Luminescence:

Fluorescent.

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Monohydrocalcite

Dichroism (e):

colorless.

Dichroism (w):

colorless.

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

Optical Data:

Uniaxial (+), w=1.545, e=1.59, bire=0.0450.

Calculated Properties of Monohydrocalcite

Electron Density:

r_electron=2.45 gm/cc
note: r_{Monohydrocalcite}=2.41 gm/cc.

Fermion Index

Fermion Index = 0.00183
Boson Index = 0.99817

Photoelectric:

PE_{Monohydrocalcite}= 4.28 barns/electron
U=PE_{Monohydrocalcite} x r_electron= 10.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Monohydrocalcite is Not Radioactive

Monohydrocalcite Classification

Dana Class:

15.1.3.1 (15)Hydrated Carbonates

(15.1)where A+ (XO3) · x(H2O)

(15.1.3)Dana Group

15.1.3.1 Monohydrocalcite CaCO3·(H2O) P 3₁12 3 2

Strunz Class:

V/D.01-50 V - Nitrates, Carbonates and Borates

V/D - Water-bearing carbonates without unfamiliar anions

V/D.01 - Barringtonite - Ikaite series

V/D.01-10 Barringtonite MgCO3·2(H2O) P1 or P1 Tri

V/D.01-20 Nesquehonite Mg(HCO3)(OH)·2(H2O) P 2₁/n 2/m

V/D.01-30 Lansfordite MgCO3·5(H2O) P 2₁/a 2/m

V/D.01-40 Hellyerite NiCO3·6(H2O) C 2/c 2/m

V/D.01-50 Monohydrocalcite CaCO3·(H2O) P 3₁12 3 2

V/D.01-60 Ikaite CaCO3·6(H2O) C 2/c or Cc Mono

Other Monohydrocalcite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Print or Cut-and-Paste your Monohydrocalcite Specimen Label here :

Monohydrocalcite

CaCO3·(H2O)
Dana No: 15.1.3.1 Strunz No: V/D.01-50
Locality:

Notes: