Kombatite Mineral Data
General Kombatite Information
Chemical Formula:
Pb14(VO4)2O9Cl4
Composition:
Molecular Weight = 3,416.48 gm
Vanadium 2.98 % V 5.32 % V2 O5
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
Empirical Formula:
Pb14 (VO4 )2 O9 Cl4
IMA Status:
Approved IMA 1986
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.
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
Name Pronunciation:
Kombatite + Pronunciation
Synonym:
ICSD 75288
PDF 40-497
Kombatite Image
Images:
Kombatite Crystallography
Axial Ratios:
a:b:c =0.5619:1:0.4998
Cell Dimensions:
a = 12.682, b = 22.566, c = 11.279, Z = 4; beta = 118.11° V = 2,847.11 Den(Calc)= 7.97
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io ): 2.812(1), 2.958(1), 3.006(1),
Physical Properties of Kombatite
Cleavage:
{???} Perfect
Color:
Light yellow.
Diaphaneity:
Translucent
Hardness:
2-3 - Gypsum-Calcite
Luster:
Adamantine
Streak:
light yellow
Optical Properties of Kombatite
Optical Data:
NCalc= 2.22 - from Gladstone-Dale relationship (KC = 0.1529) where Ncalc =Dcalc *KC +1
Calculated Properties of Kombatite
Electron Density:
Bulk Density (Electron Density)=6.52 gm/cc note: Specific Gravity of Kombatite =7.97 gm/cc.
Fermion Index:
Fermion Index = 0.18 Boson Index = 0.82
Photoelectric:
PEKombatite =1,593.62 barns/electronU=PEKombatite x r Electron Density=10394.43 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Kombatite is Not Radioactive
Kombatite Classification
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
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 � 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
References:
NAME( MinRec, v 22, p 422) PHYS. PROP.(Am.Min.,Vol.73,p928,1988)
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 - 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
15 - WWW-MINCRYST
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Kombatite
Pb14(VO4)2O9Cl4
Dana No: 41.01.04.02 Strunz No: 08.BO.20
Locality:
Notes:
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