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Tsumebite Mineral Data

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General Tsumebite Information

Help on Chemical Formula: Chemical Formula: Pb2Cu(PO4)(SO4)(OH)
Help on Composition: Composition: Molecular Weight = 685.99 gm
   Copper       9.26 %  Cu   11.60 % CuO
   Phosphorus   4.52 %  P    10.35 % P2O5
   Hydrogen     0.15 %  H     1.31 % H2O
   Lead        60.41 %  Pb   65.07 % PbO
   Sulfur       4.67 %  S    11.67 % SO3
   Oxygen      20.99 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2Cu(PO4)(SO4)(OH)
Help on Environment: Environment: Oxidized zone with other lead-bearing phosphates and sulfates.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1912
Help on Locality: Locality: Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Tsumebite + Pronunciation Say TSUMEBITE
Help on Synonym: Synonym: ICSD 76613
  PDF 29-568
 

Tsumebite Image

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  Tsumebite

Comments: Green crystalline aggregates of tsumebite on matrix.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Tsumebite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.5034:1:1.3598
Help on Cell Dimensions: Cell Dimensions: a = 8.69, b = 5.78, c = 7.86, Z = 2; beta = 111.87° V = 366.38 Den(Calc)= 6.22
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.24(1), 2.9(0.7), 2.27(0.4),2.72(0.4), 2.94(0.4), 4.7(0.3), 3.92(0.2),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 0 2 1) ( 1 0 1) ( 1 0 0) ( 1 1 0) ( 0 1 1)

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Physical Properties of Tsumebite

Help on Cleavage: Cleavage: None
Help on Color: Color: Emerald green.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: green
 

Optical Properties of Tsumebite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.148,KC= 0.1503
Ncalc = 1.93
Help on Optical Data: Optical Data: Biaxial (+), a=1.885, b=1.92, g=1.956, bire=0.0710, 2V(Calc)=88, 2V(Meas)=90. Dispersion r < v strong.
Help on Pleochroism (x): Pleochroism (x): faint.
Help on Pleochroism (y): Pleochroism (y): faint.
Help on Pleochroism (z): Pleochroism (z): faint.
 

Calculated Properties of Tsumebite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.39 gm/cc
note: Specific Gravity of Tsumebite =6.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PETsumebite =1,076.03 barns/electron
U=PETsumebite x rElectron Density=5,795.39 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tsumebite is Not Radioactive
 

Tsumebite Classification
Help on Dana Class: Dana Class: 43.04.02.01 (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.02)Tsumebite Group
 
43.04.02.01 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 21/m 2/m
 
43.04.02.02 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 21/m 2/m
Help on Strunz Class: Strunz Class: 08.BG.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BG -With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
 
08.BG.05 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2•(H2O) P 21/m 2/m
 
08.BG.05 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m
 
08.BG.05 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 21/m 2/m
 
08.BG.05 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2•(H2O) P 21,P 21/m Mono
 
08.BG.05 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m
 
08.BG.05 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 21/m 2/m
 
08.BG.05 Calderonite! Pb2Fe(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 21/m 2/m
 
08.BG.05 Tokyoite! Ba2Mn(VO4)2(OH) P 21/m 2/m
 

Other Tsumebite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Tsumebite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Tsumebite

Pb2Cu(PO4)(SO4)(OH)
Dana No: 43.04.02.01 Strunz No: 08.BG.05
Locality:

 

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