Kombatite Mineral Data

General Kombatite Information

Chemical Formula:

Pb14(VO4)2O9Cl4

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

Empirical Formula:

Pb₁₄(VO₄)₂O₉Cl₄

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 Hausmannite

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

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_Kombatite=1,593.62 barns/electron
U=PE_Kombatite x rElectron 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 ï¿½ 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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Print or Cut-and-Paste your Kombatite Specimen Label here :

Kombatite

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

Notes:

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