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Hydrocalumite Mineral Data

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General Hydrocalumite Information

Help on Chemical  Formula: Chemical Formula: Ca2Al(OH)6[Cl1-x(OH)x]•3(H2O)
Help on Composition: Composition: Molecular Weight = 289.46 gm
   Calcium   27.69 %  Ca   38.75 % CaO
   Aluminum   9.32 %  Al   17.61 % Al2O3
   Hydrogen   4.35 %  H    38.90 % H2O
   Chlorine   6.12 %  Cl    6.12 % Cl
               -   %   Cl   -1.38 % -O=Cl2   
   Oxygen    52.51 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Al(OH)6.5Cl0.5•3(H2O)
Help on Environment: Environment: Late-stage hydrothermal mineral in skarns formed from contact metamorphism of limestone
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1934
Help on Locality: Locality: Scawt Hill, near Larne, Co. Antrim, Ireland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for a HYDROus mineral containing CAlcium and ALUMinum.
Help on Name Pronunciation: Name Pronunciation: Hydrocalumite + Pronunciation Say HYDROCALUMITE
Help on Synonym: Synonym: ICSD 63250
  PDF 31-245

Hydrocalumite Image

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Comments: Bright white platy crystal aggregate of hydrocalumite.
Location: Boissejour, Puy-de-Dome, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydrocalumite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8421:1:1.4771
Help on Cell Dimensions: Cell Dimensions: a = 9.6, b = 11.4, c = 16.84, Z = 8; beta = 111° V = 1,720.56 Den(Calc)= 2.23
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.86(1), 3.93(0.6), 2.89(0.5),

Physical Properties of Hydrocalumite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless, Light green.
Help on Density: Density: 2.15
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Hydrocalumite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2459,KPDmeas= 0.255,KC= 0.2694
Ncalc = 1.58 - 1.6
Help on Optical Data: Optical Data: Biaxial (-), a=1.535, b=1.553, g=1.557, bire=0.0220, 2V(Calc)=50, 2V(Meas)=24.

Calculated Properties of Hydrocalumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.23 gm/cc
note: Specific Gravity of Hydrocalumite =2.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0006324168
Boson Index = 0.9993675832
Help on Photoelectric: Photoelectric: PEHydrocalumite = 4.05 barns/electron
U=PEHydrocalumite x rElectron Density= 9.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydrocalumite is Not Radioactive

Hydrocalumite Classification

Help on  Dana Class: Dana Class: (06)Hydroxides and Oxides Containing Hydroxyl
  (06.04)containing multiple cations
  (06.04.04)Dana Group Hydrocalumite Ca2Al(OH)6[Cl1-x(OH)x]•3(H2O) P 21 2
Help on  Strunz Class: Strunz Class: 04.FL.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FL -Hydroxides with H2O � (OH); sheets of edge-sharing octahedra
04.FL.10 Hydrocalumite Ca2Al(OH)6[Cl1-x(OH)x]•3(H2O) P 21 2

Other Hydrocalumite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Hydrocalumite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 04.FL.10





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