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Kolwezite Mineral Data

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General Kolwezite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Co)2(CO3)(OH)2
Help on Composition: Composition: Molecular Weight = 218.07 gm
   Cobalt    17.84 %  Co   22.68 % CoO
   Copper    39.05 %  Cu   48.88 % CuO
   Hydrogen   0.92 %  H     8.26 % H2O
   Carbon     5.51 %  C    20.18 % CO2
   Oxygen    36.68 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu1.34Co0.66(CO3)(OH)2
Help on Environment: Environment: Oxidized zone of a Cu-Co deposit.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Kolwezi-Kamoto-Musonoi, southern Shava, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the mine locality.
Help on Name Pronunciation: Name Pronunciation: Kolwezite + Pronunciation Say KOLWEZITE
 

Kolwezite Image

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  Kolwezite

Comments: Green kolwezite cotton balls on pink cobaltian calcite.
Location: Musononi mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Kolwezite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7818:1:0.2624
Help on Cell Dimensions: Cell Dimensions: a = 9.5, b = 12.15, c = 3.189, Z = 4; alpha = 93.32°, beta = 90.74°, gamma = 91.47° V = 367.32 Den(Calc)= 3.94
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.7(1), 5.08(0.8), 6.04(0.8),
 

Physical Properties of Kolwezite

Help on Color: Color: Beige brown, Green, Black.
Help on Density: Density: 3.97
Help on Diaphaneity: Diaphaneity: Translucent to Subopaque
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: beige
 

Optical Properties of Kolwezite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2015,KPDmeas= 0.2,KC= 0.1944
Ncalc = 1.77
Help on Optical Data: Optical Data: Biaxial (?), a=1.688, g=1.9, bire=0.2120
 

Calculated Properties of Kolwezite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Kolwezite =3.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0007833302
Boson Index = 0.9992166698
Help on Photoelectric: Photoelectric: PEKolwezite = 23.30 barns/electron
U=PEKolwezite x rElectron Density= 88.81 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kolwezite is Not Radioactive
 

Kolwezite Classification

Help on  Dana Class: Dana Class: 16a.03.01.03 (16a)Carbonates - Hydroxyl or Halogen
  (16a.03)where (A B)2 (XO3) Zq
  (16a.03.01)Rosasite Group
 
16a.03.01.01 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m
 
16a.03.01.02 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m
 
16a.03.01.03 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri
 
16a.03.01.04 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m
 
16a.03.01.05 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m
Help on  Strunz Class: Strunz Class: 05.BA.10 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BA -With Cu, Co, Ni, Zn, Mg, Mn
 
05.BA.10 Nullaginite Ni2(CO3)(OH)2 P 21/m,P 21 Mono
 
05.BA.10 Georgeite Cu5(CO3)3(OH)4•6(H2O) None
 
05.BA.10 Malachite Cu2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m
 
05.BA.10 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri
 
05.BA.10 Pokrovskite Mg2(CO3)(OH)2•0.5(H2O) P 21/a 2/m
 
05.BA.10 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Chukanovite! Fe2(CO3)(OH)2 P 21/a 2/m
 

Other Kolwezite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Kolwezite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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

Kolwezite

(Cu,Co)2(CO3)(OH)2
Dana No: 16a.03.01.03 Strunz No: 05.BA.10
Locality:

 

Notes:

 

 
   
 


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