Mineralogy Database

Prewittite Mineral Data

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General Prewittite Information

Help on Chemical  Formula: Chemical Formula: KPb1.5ZnCu6O2(SeO3)2Cl10
Help on Composition: Composition: Molecular Weight = 1,437.01 gm
   Potassium   2.72 %  K     3.28 % K2O
   Zinc        4.55 %  Zn    5.66 % ZnO
   Copper     26.53 %  Cu   29.87 % Cu2O
   Lead       21.63 %  Pb   22.46 % Pb2O
   Selenium   10.99 %  Se   15.44 % SeO2
   Chlorine   24.67 %  Cl   24.67 % Cl
                -   %   Cl   -5.57 % -O=Cl2   
   Oxygen      8.91 %  O
             ______        ______ 
             100.00 %       95.82 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KPb1.5ZnCu6O2(SeO3)2Cl10
Help on Environment: Environment: New structure type
Help on IMA Status: IMA Status: Proposed IMA 2002 (Dana # Added)
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2002-041

Prewittite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4703:1:0.6805
Help on Cell Dimensions: Cell Dimensions: a = 9.132, b = 19.415, c = 13.213, Z = 4; V = 2,342.64 Den(Calc)= 4.07
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.66(1), 4.11(0.9), 8.26(0.7),7.63(0.6), 2.887(0.5), 2.642(0.4), 2.996(0.4),

Physical Properties of Prewittite

Help on Color: Color: Olive green.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Prewittite

Help on Optical Data: Optical Data: Biaxial (-)
  NCalc= 1.79 - from Gladstone-Dale relationship (KC = 0.1934) where Ncalc=Dcalc*KC+1

Calculated Properties of Prewittite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.67 gm/cc
note: Specific Gravity of Prewittite =4.07 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEPrewittite = 393.54 barns/electron
U=PEPrewittite x relectron=1,444.53 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 35.39 (Gamma Ray American Petroleum Institute Units)
Concentration of Prewittite per GRapi unit = 2.83 (%)

Estimated Radioactivity from Prewittite - barely detectable


Prewittite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.06)Dana Type
  (34.06.09)Dana Group Prewittite! KPb1.5ZnCu6O2(SeO3)2Cl10 Pnnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.JG. 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JG -Selenites with additional anions, without H2O
04.JG. Prewittite! KPb1.5ZnCu6O2(SeO3)2Cl10 Pnnm 2/m 2/m 2/m

Other Prewittite Information

Help on See Also: See Also: Links to other databases for Prewittite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 04.JG.