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Arsentsumebite Mineral Data

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General Arsentsumebite Information

Help on Chemical  Formula: Chemical Formula: Pb2Cu(AsO4)(SO4)(OH)
Help on Composition: Composition: Molecular Weight = 729.94 gm
   Copper     8.71 %  Cu   10.90 % CuO
   Arsenic   10.26 %  As   15.74 % As2O5
   Hydrogen   0.14 %  H     1.23 % H2O
   Lead      56.77 %  Pb   61.16 % PbO
   Sulfur     4.39 %  S    10.97 % SO3
   Oxygen    19.73 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2Cu(AsO4)(SO4)(OH)
Help on Environment: Environment: A rare mineral in the oxidized zone of a dolostone-hosted hydrothermal polymetallic ore deposit (Tsumeb, Namibia); in a hydrothermal polymetallic barite-fluorite deposit (Clara mine , Germany).
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1935
Help on Locality: Locality: From Tsumeb, Namibia. In the Clara mine, near Oberwolfach, Black Forest, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the "arsenate" analog of "tsumebite."
Help on Name Pronunciation: Name Pronunciation: Arsentsumebite + Pronunciation Say ARSENTSUMEBITE

Arsentsumebite Image

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Comments: Crystallized arsentsumebite in a vuggy rock matrix.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Crystals to 0.25mm.
© John Veevaert

Arsentsumebite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4949:1:1.3243
Help on Cell Dimensions: Cell Dimensions: a = 8.85, b = 5.92, c = 7.84, Z = 2; beta = 112.6° V = 379.21 Den(Calc)= 6.39
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): 3.25(1), 4.8(0.65), 2.76(0.6),

Physical Properties of Arsentsumebite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow green, Emerald green.
Help on Density: Density: 6.46
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Adamantine - Metallic
Help on Streak: Streak: light green

Optical Properties of Arsentsumebite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1551,KPDmeas= 0.1534,KC= 0.149
Ncalc = 1.95 - 1.96
Help on Optical Data: Optical Data: Biaxial (-), a=1.97, b=1.992, g=2.011, bire=0.0410, 2V(Calc)=84, 2V(Meas)=88.

Calculated Properties of Arsentsumebite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.58 gm/cc
note: Specific Gravity of Arsentsumebite =6.46 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEArsentsumebite =1,022.00 barns/electron
U=PEArsentsumebite x rElectron Density=5,698.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arsentsumebite is Not Radioactive

Arsentsumebite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.02)Tsumebite Group Tsumebite Pb2Cu(PO4)(SO4)(OH) P 21/m 2/m 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 Arsentsumebite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Arsentsumebite :
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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Dana No: Strunz No: 08.BG.05





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