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Claraite Mineral Data

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General Claraite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Zn)3(CO3)(OH)4•4(H2O)
Help on Composition: Composition: Molecular Weight = 392.58 gm
   Zinc      16.66 %  Zn   20.73 % ZnO
   Copper    32.37 %  Cu   40.52 % CuO
   Hydrogen   3.08 %  H    27.53 % H2O
   Carbon     3.06 %  C    11.21 % CO2
   Oxygen    44.83 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2Zn(CO3)(OH)4•4(H2O)
Help on Environment: Environment: Secondary mineral.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Clara Mine, Black Forest, Wolfach, Schwarzwald, Baden-W�rttemberg, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.

Claraite Image

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Comments: Green, round spherical grain of claraite on fluorite.
Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Claraite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7783:1:0.9053
Help on Cell Dimensions: Cell Dimensions: a = 14.28, b = 8.03, c = 7.27, Z = 4; alpha = 79.16°, beta = 107.9°, gamma = 99.68° V = 768.04 Den(Calc)= 3.39
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 13.47(1)(100), 7.84(0.9)(010), 3.65(0.8)(120,021),2.96(0.6)(410,211,4115.17(0.6)(2

Physical Properties of Claraite

Help on Cleavage: Cleavage: {1010} Perfect
Help on Color: Color: Blue.
Help on Density: Density: 3.35
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: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Claraite

Help on Dichroism (e): Dichroism (e): colorless or colorless.
Help on Dichroism (w): Dichroism (w): pale green or bluish green.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.048 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.054 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2071,KPDmeas= 0.2084,KC= 0.2189
Ncalc = 1.73 - 1.74
Help on Optical Data: Optical Data: Uniaxial (-), e=1.645, w=1.751, bire=0.1060.

Calculated Properties of Claraite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.31 gm/cc
note: Specific Gravity of Claraite =3.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0073854748
Boson Index = 0.9926145252
Help on Photoelectric: Photoelectric: PEClaraite = 21.99 barns/electron
U=PEClaraite x rElectron Density= 72.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Claraite is Not Radioactive

Claraite Classification

Help on  Dana Class: Dana Class: 16b.04.03.01 (16b)Carbonates - Hydroxyl or Halogen
  (16b.04)where (A)m (B)n (XO3)p Zq � x(H2O), with (m+n):p=8:1
  (16b.04.03)Dana Group
16b.04.03.01 Claraite (Cu,Zn)3(CO3)(OH)4•4(H2O) P1 or P1 Tri
Help on  Strunz Class: Strunz Class: 05.DA.30 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.30 Claraite (Cu,Zn)3(CO3)(OH)4•4(H2O) P1 or P1 Tri

Other Claraite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(AmMin, Vol 88, p 254) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Claraite :
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: 16b.04.03.01 Strunz No: 05.DA.30





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