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General Comblainite Information |
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 Chemical Formula: |
Ni++6Co+++2(CO3)(OH)16•4(H2O) | ||
| 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 | |||
| Empirical Formula: |
Ni6Co2(CO3)(OH)16•4(H2O) | ||
| Environment: |
Secondary mineral found on altered uraninite in the uranium deposits at Shinkolobwe. | ||
| IMA Status: |
Approved IMA 1980 | ||
| Locality: |
Shinkolobwe mine (Kasolo mine), Shaba (Katanga), Congo (Zaire). Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Gordon Comblain (1929-) of the Musee Royal de l'Afrique Centrale, Tervuren, Belgium who discovered the mineral. | ||
Search for Comblainite Images | |||
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Images:
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Comblainite Crystallography |
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| Axial Ratios: |
a:c = 1:7.49671 | ||
| Cell Dimensions: |
a = 6.08, c = 45.58, Z = 3; V = 1,459.19 Den(Calc)= 2.98 | ||
| Crystal System: |
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 7.64(1), 2.567(0.7), 3.808(0.5), | ||
Physical Properties of Comblainite |
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| Color: |
Blue, Turquoise. | ||
| Density: |
3.05 | ||
| Diaphaneity: |
Transparent | ||
| Habit: |
Encrustations - Forms crust-like aggregates on matrix. | ||
| Hardness: |
2 - Gypsum | ||
| Luster: |
Pearly | ||
Optical Properties of Comblainite |
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| Dichroism (e): |
none. | ||
| Dichroism (w): |
none. | ||
| 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 |
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| Optical Data: |
Uniaxial (-), e=1.684, w=1.69, bire=0.0060. | ||
Calculated Properties of Comblainite |
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| Electron Density: |
Bulk Density (Electron Density)=2.97 gm/cc note: Specific Gravity of Comblainite =2.98 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0049091668 Boson Index = 0.9950908332 |
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| Photoelectric: |
PEComblainite = 20.21 barns/electron U=PEComblainite x rElectron Density= 60.07 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Comblainite is Not Radioactive |
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Comblainite Classification |
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| Dana Class: |
16b.06.03.03 (16b)Carbonates - Hydroxyl or Halogen | ||
| (16b.06)Dana Type | |||
| (16b.06.03)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral) | |||
| Strunz Class: |
05.DA.50 05 - CARBONATES (NITRATES) | ||
| 05.D - Carbonates with Additional Anions, with H2O | |||
| 05.DA -With medium-sized cations | |||
Other Comblainite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| 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 Search for Comblainite using: Visit our Advertisers for Comblainite : A Bijoux Google Search for ComblainiteAdam's Minerals Google Search for Comblainite Cape Minerals Google Search for Comblainite Dakota Matrix Minerals Google Search for Comblainite Excalibur Mineral Corp. Google Search for Comblainite Exceptional Minerals Google Search for Comblainite John Betts Fine Minerals Search for Comblainite McDougall Minerals Google Search for Comblainite Mineral News Website Link Rock and Mineral Shows Google Search for Comblainite Weinrich Minerals, Inc. Google Search for Comblainite Ask about Comblainite here : Print or Cut-and-Paste your Comblainite Specimen Label here :
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