Mineralogy Database

Cobaltkoritnigite Mineral Data

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General Cobaltkoritnigite Information

Help on Chemical  Formula: Chemical Formula: (Co,Zn)(AsO3OH)•(H2O)
Help on Composition: Composition: Molecular Weight = 218.49 gm
   Zinc       7.48 %  Zn    9.31 % ZnO
   Cobalt    20.23 %  Co   25.72 % CoO
   Arsenic   34.29 %  As   52.60 % As2O5
   Hydrogen   1.38 %  H    12.37 % H2O
   Oxygen    36.61 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Co0.75Zn0.25(AsO3OH)•(H2O)
Help on Environment: Environment: Weathering product of glaucodot.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Old specimen from the Erzgebirge, Saxony, probably from the Schwarzenberg district, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its relation to koritnigite and high cobalt content.
Help on Synonym: Synonym: Cobaltokoritnigite
  ICSD 32025
  PDF 35-499

Cobaltkoritnigite Image

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  Cobaltkoritnigite   Erythrite

Comments: Dark purplish cobaltkoritnigite with pink erythrite.
Location: Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Cobaltkoritnigite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5022:1:0.4213
Help on Cell Dimensions: Cell Dimensions: a = 7.95, b = 15.83, c = 6.67, Z = 8; alpha = 90.9°, beta = 96.6°, gamma = 90° V = 833.74 Den(Calc)= 3.48
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.94(1), 3.14(0.7), 3.82(0.5),

Physical Properties of Cobaltkoritnigite

Help on Cleavage: Cleavage: {010} Perfect, {100} Good
Help on Color: Color: Dark pink, Purple red, Purple.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: reddish white

Optical Properties of Cobaltkoritnigite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1934,KC= 0.188
Ncalc = 1.65
Help on Optical Data: Optical Data: Biaxial (+), a=1.646, b=1.668, g=1.705, bire=0.0590, 2V(Calc)=78, 2V(Meas)=78.

Calculated Properties of Cobaltkoritnigite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.30 gm/cc
note: Specific Gravity of Cobaltkoritnigite =3.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0032454585
Boson Index = 0.9967545415
Help on Photoelectric: Photoelectric: PECobaltkoritnigite = 34.15 barns/electron
U=PECobaltkoritnigite x rElectron Density= 112.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cobaltkoritnigite is Not Radioactive

Cobaltkoritnigite Classification

Help on  Dana Class: Dana Class: (39)Hydrated Acid Phosphates, etc
  (39.01)A+ [HXO4] � x(H2O)
  (39.01.04)Dana Group Koritnigite ZnHAsO4•(H2O) P1 1 Cobaltkoritnigite (Co,Zn)(AsO3OH)•(H2O) P1 1
Help on  Strunz Class: Strunz Class: 08.CB.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CB -With only medium-sized cations, RO4:H2O = 1:1
08.CB.20 Cobaltkoritnigite (Co,Zn)(AsO3OH)•(H2O) P1 1
08.CB.20 Koritnigite ZnHAsO4•(H2O) P1 1

Other Cobaltkoritnigite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Cobaltkoritnigite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.CB.20





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