Mineralogy Database

Bartelkeite Mineral Data

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General Bartelkeite Information

Help on Chemical  Formula: Chemical Formula: PbFe++Ge3O8
Help on Composition: Composition: Molecular Weight = 608.87 gm
   Iron        9.17 %  Fe   11.80 % FeO
   Germanium  35.78 %  Ge   51.54 % GeO2
   Lead       34.03 %  Pb   36.66 % PbO
   Oxygen     21.02 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbFe2+Ge3O8
Help on Environment: Environment: Primary ore cavities with other Ge-bearing minerals.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Wolfgang Bartelke, mineral collector and specialist in Tsumeb mineral.
Help on Name Pronunciation: Name Pronunciation: Bartelkeite + Pronunciation Say BARTELKEITE

Bartelkeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3967:1:0.4304
Help on Cell Dimensions: Cell Dimensions: a = 5.431, b = 13.689, c = 5.892, Z = 2; beta = 111.48° V = 407.62 Den(Calc)= 4.96
Help on Crystal System: Crystal System: Monoclinic Space Group: P 21,P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.91(1), 2.87(0.8), 4.42(0.8),

Physical Properties of Bartelkeite

Help on Cleavage: Cleavage: {101} Distinct
Help on Color: Color: Colorless, Light green.
Help on Density: Density: 4.97
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4 - Fluorite
Help on Streak: Streak: white

Optical Properties of Bartelkeite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.157 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.159 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.182,KPDmeas= 0.1816,KC= 0.157
Ncalc = 1.78
Help on Optical Data: Optical Data: Biaxial (-), a=1.885, b=1.91, g=1.913, bire=0.0280, 2V(Calc)=36, 2V(Meas)=~35. Dispersion r > v.

Calculated Properties of Bartelkeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.38 gm/cc
note: Specific Gravity of Bartelkeite =4.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEBartelkeite = 619.99 barns/electron
U=PEBartelkeite x rElectron Density=2,712.58 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bartelkeite is Not Radioactive

Bartelkeite Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.06)where A (B)4 X9
  (07.06.02)Dana Group Bartelkeite PbFeGe3O8 P 21,P 21/m Mono
Help on  Strunz Class: Strunz Class: 09.JA.10 09 - SILICATES (Germanates)
  09.J - Germanates
  09.JA -Germanates
09.JA.10 Bartelkeite PbFeGe3O8 P 21,P 21/m Mono

Other Bartelkeite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Bartelkeite :
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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Dana No: Strunz No: 09.JA.10





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