Mineralogy Database

Comblainite Mineral Data

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General Comblainite Information

Help on Chemical  Formula: Chemical Formula: Ni++6Co+++2(CO3)(OH)16•4(H2O)
Help on Composition: Composition: Molecular Weight = 874.19 gm
   Cobalt    13.48 %  Co   18.97 % Co2O3
   Nickel    40.28 %  Ni   51.26 % NiO
   Hydrogen   2.77 %  H    24.73 % H2O
   Carbon     1.37 %  C     5.03 % CO2
   Oxygen    42.09 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ni6Co2(CO3)(OH)16•4(H2O)
Help on Environment: Environment: Secondary mineral found on altered uraninite in the uranium deposits at Shinkolobwe.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Shinkolobwe mine (Kasolo mine), Shaba (Katanga), Congo (Zaire). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gordon Comblain (1929-) of the Musee Royal de l'Afrique Centrale, Tervuren, Belgium who discovered the mineral.
 

Comblainite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:7.49671
Help on Cell Dimensions: Cell Dimensions: a = 6.08, c = 45.58, Z = 3; V = 1,459.19 Den(Calc)= 2.98
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.64(1), 2.567(0.7), 3.808(0.5),
 

Physical Properties of Comblainite

Help on Color: Color: Blue, Turquoise.
Help on Density: Density: 3.05
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
 

Optical Properties of Comblainite

Help on Dichroism (e): Dichroism (e): none.
Help on Dichroism (w): Dichroism (w): none.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.089 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.068 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2305,KPDmeas= 0.2252,KC= 0.2473
Ncalc = 1.74 - 1.75
Help on Optical Data: Optical Data: Uniaxial (-), e=1.684, w=1.69, bire=0.0060.
 

Calculated Properties of Comblainite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Comblainite =2.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0049091668
Boson Index = 0.9950908332
Help on Photoelectric: Photoelectric: PEComblainite = 20.21 barns/electron
U=PEComblainite x rElectron Density= 60.07 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Comblainite is Not Radioactive
 

Comblainite Classification

Help on  Dana Class: Dana Class: 16b.06.03.03 (16b)Carbonates - Hydroxyl or Halogen
  (16b.06)Dana Type
  (16b.06.03)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral)
 
16b.06.03.01 Reevesite Ni6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m
 
16b.06.03.02 Takovite Ni6Al2(OH)16(CO3,OH)•4(H2O) R 3m 3 2/m
 
16b.06.03.03 Comblainite Ni6Co2(CO3)(OH)16•4(H2O) R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 05.DA.50 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
 
05.DA.50 Desautelsite Mg6Mn2(CO3)(OH)16•4(H2O) R 3m or R 3m Trig
 
05.DA.50 Comblainite Ni6Co2(CO3)(OH)16•4(H2O) R 3m 3 2/m
 
05.DA.50 Hydrotalcite Mg6Al2(CO3)(OH)16•4(H2O) R 3m 3 2/m
 
05.DA.50 Pyroaurite Mg6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m
 
05.DA.50 Reevesite Ni6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m
 
05.DA.50 Stichtite Mg6Cr2(CO3)(OH)16•4(H2O) R 3m 3 2/m
 
05.DA.50 Takovite Ni6Al2(OH)16(CO3,OH)•4(H2O) R 3m 3 2/m
 

Other Comblainite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Comblainite :
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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Print or Cut-and-Paste your Comblainite Specimen Label here :

Comblainite

Ni++6Co+++2(CO3)(OH)16•4(H2O)
Dana No: 16b.06.03.03 Strunz No: 05.DA.50
Locality:

 

Notes:

 

 
   
 


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