Kombatite Mineral Data

Kombatite Mineral Data
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General Kombatite Information

Help on Chemical Formula: Chemical Formula: Pb14(VO4)2O9Cl4
Help on Composition: Composition: Molecular Weight = 3,416.48 gm
   Vanadium   2.98 %  V     5.32 % V2O5
   Lead      84.91 %  Pb   91.46 % PbO
   Chlorine   4.15 %  Cl    4.15 % Cl
               -   %   Cl   -0.94 % -O=Cl2   
   Oxygen     7.96 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb14(VO4)2O9Cl4
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Kombat mine, located 37 km east of Otavi and 49 km south of Tsumeb in the north-central part of Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name is for the Kombat mine, which is the Anglicized version of the Herero names, "Okombahe Tijinene" and "Okombahe Katiti" which mean "the large drinking place of the giraffe," and the "small drinking place of the
Help on Name Pronunciation: Name Pronunciation: Kombatite + Pronunciation Say KOMBATITE
Help on Synonym: Synonym: ICSD 75288
  PDF 40-497
 

Kombatite Image

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Kombatite   Hausmannite

Comments: Yellow kombatite crystals in black hausmannite.
Location: Kombat Mine, Otavi, Namibia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Kombatite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5619:1:0.4998
Help on Cell Dimensions: Cell Dimensions: a = 12.682, b = 22.566, c = 11.279, Z = 4; beta = 118.11° V = 2,847.11 Den(Calc)= 7.97
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.812(1), 2.958(1), 3.006(1),
Click Here for Large Kombatite Structure Window Crystal Structure:

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Cooper M A , Hawthorne F C , American Mineralogist , 79 (1994) p.550-554, The crystal structure of kombatite, Pb14(VO4)2O9Cl4, a complex heteropolyhedral, sheet mineral

 

Physical Properties of Kombatite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Light yellow.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light yellow
 

Optical Properties of Kombatite

Help on Optical Data: Optical Data: NCalc= 2.22 - from Gladstone-Dale relationship (KC = 0.1529) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Kombatite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.52 gm/cc
note: Specific Gravity of Kombatite =7.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.18
Boson Index = 0.82
Help on Photoelectric: Photoelectric: PEKombatite =1,593.62 barns/electron
U=PEKombatite x rElectron Density=10394.43 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kombatite is Not Radioactive
 

Kombatite Classification
Help on Dana Class: Dana Class: 41.01.04.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.01)where (A++)m (XO4)p Zq, with m:p>4:1
  (41.01.04)Dana Group
 
41.01.04.01 Sahlinite Pb14(AsO4)2O9Cl4 C 2/c 2/m
 
41.01.04.02 Kombatite Pb14(VO4)2O9Cl4 C 2/c 2/m
Help on Strunz Class: Strunz Class: 08.BO.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BO -With only large cations, (OH, etc.):RO4 ³ 1:1
 
08.BO.20 Kombatite Pb14(VO4)2O9Cl4 C 2/c 2/m
 
08.BO.20 Sahlinite Pb14(AsO4)2O9Cl4 C 2/c 2/m
 

Other Kombatite Information
Help on References: References: NAME( MinRec, v 22, p 422) PHYS. PROP.(Am.Min.,Vol.73,p928,1988)
Help on See Also: See Also: Links to other databases for Kombatite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Kombatite

Pb14(VO4)2O9Cl4
Dana No: 41.01.04.02 Strunz No: 08.BO.20
Locality:

 

Notes: