Mineralogy Database

Para-alumohydrocalcite Mineral Data

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General Para-alumohydrocalcite Information

Help on Chemical  Formula: Chemical Formula: CaAl2(CO3)2(OH)4•6(H2O)
Help on Composition: Composition: Molecular Weight = 390.18 gm
   Calcium   10.27 %  Ca   14.37 % CaO
   Aluminum  13.83 %  Al   26.13 % Al2O3
   Hydrogen   4.13 %  H    36.94 % H2O
   Carbon     6.16 %  C    22.56 % CO2
   Oxygen    65.61 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2(CO3)2(OH)4•6(H2O)
Help on Environment: Environment: Oxidized zone of sulfur deposits with gypsum and calcite.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Vodinsk, Ukraine, and Gaurdok, Turkmenistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its relationship with alumohydrocalcite.

Para-alumohydrocalcite Crystallography

Help on Crystal System: Crystal System: Triclinic
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.9(1), 2.64(0.32), 6.2(0.3),

Physical Properties of Para-alumohydrocalcite

Help on Color: Color: White, Colorless.
Help on Density: Density: 2
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Streak: Streak: white

Optical Properties of Para-alumohydrocalcite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2445,KC= 0.2575
Ncalc = 1.51
Help on Optical Data: Optical Data: Biaxial (-), a=1.473, b=1.492, g=1.502, bire=0.0290, 2V(Calc)=70, 2V(Meas)=69.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.

Calculated Properties of Para-alumohydrocalcite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.07 gm/cc
note: Specific Gravity of Para-alumohydrocalcite =2.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0011370167
Boson Index = 0.9988629833
Help on Photoelectric: Photoelectric: PEPara-alumohydrocalcite = 1.82 barns/electron
U=PEPara-alumohydrocalcite x rElectron Density= 3.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Para-alumohydrocalcite is Not Radioactive

Para-alumohydrocalcite Classification

Help on  Dana Class: Dana Class: 16b.02.03.02 (16b)Carbonates - Hydroxyl or Halogen
  (16b.02)where (A)m (B)n (XO3)p Zq � x(H2O), with (m+n):p=3:2
  (16b.02.03)Dana Group
16b.02.03.01 Alumohydrocalcite CaAl2(CO3)2(OH)4•3(H2O) P1 1
16b.02.03.02 Para-alumohydrocalcite CaAl2(CO3)2(OH)4•6(H2O) Tri
Help on  Strunz Class: Strunz Class: 05.DB.05 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DB -With large and medium-sized cations
05.DB.05 Alumohydrocalcite CaAl2(CO3)2(OH)4•3(H2O) P1 1
05.DB.05 Nasledovite PbMn3Al4(CO3)4(SO4)O5•5(H2O) Tri
05.DB.05 Para-alumohydrocalcite CaAl2(CO3)2(OH)4•6(H2O) Tri

Other Para-alumohydrocalcite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Para-alumohydrocalcite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: 16b.02.03.02 Strunz No: 05.DB.05





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