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Prewittite Mineral Data
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General Prewittite Information
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 Chemical Formula: |
KPb1.5ZnCu6O2(SeO3)2Cl10 |
| Composition: |
Molecular Weight = 1,437.01 gm |
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Potassium 2.72 % K 3.28 % K2O |
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Zinc 4.55 % Zn 5.66 % ZnO |
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Copper 26.53 % Cu 29.87 % Cu2O |
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Lead 21.63 % Pb 22.46 % Pb2O |
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Selenium 10.99 % Se 15.44 % SeO2 |
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Chlorine 24.67 % Cl 24.67 % Cl |
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- %
Cl -5.57 % -O=Cl2 |
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Oxygen 8.91 % O |
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______ ______ |
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100.00 % 95.82 % = TOTAL OXIDE |
| Empirical Formula: |
KPb1.5ZnCu6O2(SeO3)2Cl10 |
| Environment: |
New structure type |
| IMA Status: |
Proposed IMA 2002 (Dana # Added) |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| Synonym: |
IMA2002-041 |
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Prewittite Crystallography
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| Axial Ratios: |
a:b:c =0.4703:1:0.6805 |
| Cell Dimensions: |
a = 9.132, b = 19.415, c = 13.213, Z = 4; V = 2,342.64 Den(Calc)= 4.07 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
| 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), |
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Physical Properties of Prewittite
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| Color: |
Olive green. |
| Diaphaneity: |
Transparent |
| Luster: |
Vitreous (Glassy) |
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Optical Properties of Prewittite
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| Optical Data: |
Biaxial (-) |
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NCalc= 1.79 - from Gladstone-Dale relationship (KC = 0.1934) where Ncalc=Dcalc*KC+1
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Calculated Properties of Prewittite
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| Electron Density: |
Bulk Density (Electron Density)=3.67 gm/cc
note: Specific Gravity of Prewittite =4.07 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PEPrewittite = 393.54 barns/electron
U=PEPrewittite x relectron=1,444.53 barns/cc.
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| Radioactivity: |
GRapi = 35.39 (Gamma Ray American Petroleum Institute Units)
Concentration of Prewittite per GRapi unit = 2.83 (%)
Estimated Radioactivity from Prewittite  - barely detectable
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Prewittite Classification
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| Dana Class: |
34.06.09.01 (34)Selenites - Tellurites - Sulfites |
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(34.06)Dana Type |
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(34.06.09)Dana Group |
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34.06.09.01 Prewittite! KPb1.5ZnCu6O2(SeO3)2Cl10 Pnnm 2/m 2/m 2/m |
| Strunz Class: |
04.JG. 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JG -Selenites with additional anions, without H2O |
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04.JG. Prewittite! KPb1.5ZnCu6O2(SeO3)2Cl10 Pnnm 2/m 2/m 2/m |
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Other Prewittite Information
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| 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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Print or Cut-and-Paste your Prewittite Specimen Label here :
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Prewittite
KPb1.5ZnCu6O2(SeO3)2Cl10
Dana No: 34.06.09.01 Strunz No: 04.JG.
Locality:
Notes:
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