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Plumbotsumite Mineral Data

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General Plumbotsumite Information

Help on Chemical  Formula: Chemical Formula: Pb5Si4O8(OH)10
Help on Composition: Composition: Molecular Weight = 1,446.41 gm
   Silicon    7.77 %  Si   16.62 % SiO2
   Hydrogen   0.70 %  H     6.23 % H2O
   Lead      71.63 %  Pb   77.16 % PbO
   Oxygen    19.91 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb5Si4O8(OH)10
Help on Environment: Environment: A secondary mineral developed in the oxidized zone above complex galena-bearing ores.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: From Tsumeb, Namibia. In the Mammoth-St. Anthony mine, Tiger, Pinal Co., Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For lead, PLUMBum, in the mineral's composition, and the type locality, TSUMeb, Namibia.
Help on Name Pronunciation: Name Pronunciation: Plumbotsumite + Pronunciation Say PLUMBOTSUMITE

Plumbotsumite Image

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Comments: Translucent plumbotsumite microcrystals.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Plumbotsumite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7141:1:3.1707
Help on Cell Dimensions: Cell Dimensions: a = 15.875, b = 9.261, c = 29.364, Z = 10; V = 4,317.05 Den(Calc)= 5.56
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: C 2221
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.65(1), 3.12(0.8), 14.7(0.7),

Physical Properties of Plumbotsumite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless.
Help on Density: Density: 5.6
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Plumbotsumite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1674,KPDmeas= 0.1663,KC= 0.1584
Ncalc = 1.88 - 1.89
Help on Optical Data: Optical Data: Biaxial (-), a=1.922, b=1.933, g=1.938, bire=0.0160, 2V(Calc)=66, 2V(Meas)=32.

Calculated Properties of Plumbotsumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.80 gm/cc
note: Specific Gravity of Plumbotsumite =5.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEPlumbotsumite =1,282.92 barns/electron
U=PEPlumbotsumite x rElectron Density=6,159.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Plumbotsumite is Not Radioactive

Plumbotsumite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.01)possible nesosilicates
  (78.01.07)Dana Group Plumbotsumite Pb5Si4O8(OH)10 C 2221 2 2 2
Help on  Strunz Class: Strunz Class: 09.HH.20 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HH -With Pb
09.HH.20 Plumbotsumite Pb5Si4O8(OH)10 C 2221 2 2 2

Other Plumbotsumite Information

Help on References: References: NAME( AntBidBlaNic2) 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 Plumbotsumite :
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.HH.20





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