General Paderaite Information Chemical Formula: |
Cu7((Cu,Ag)0.33Pb1.33Bi11.33)13S22 |
Composition: |
Molecular Weight = 3,824.86 gm |
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Copper 11.78 % Cu |
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Silver 0.51 % Ag |
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Bismuth 61.63 % Bi |
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Tellurium 0.23 % Te |
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Lead 7.42 % Pb |
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Sulfur 18.43 % S |
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______ |
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100.00 % |
Empirical Formula: |
Cu7.09Ag0.18Pb1.37Bi11.28S21.98Te0.07 |
Environment: |
Intimately intergrown with other Pb-Bi sulfosalts. |
IMA Status: |
Approved IMA 1985 |
Locality: |
Baita (Resbanya), Romania. Link to MinDat.org Location Data. |
Name Origin: |
Named for K. Padera, Charles University, Prague, Czechoslovakia. |
Name Pronunciation: |
Paderaite + Pronunciation |
Synonym: |
ICSD 63260 |
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PDF 42-617 |
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Images:
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| | Paderaite Crystallography Axial Ratios: |
a:b:c =4.4647:1:7.2241 |
Cell Dimensions: |
a = 17.585, b = 3.9386, c = 28.453, Z = 2; beta = 105.41° V = 1,899.82 Den(Calc)= 6.69 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.06(1), 3.63(0.74), 3.21(0.54), |
Crystal Structure:
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Mouse
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| Physical Properties of Paderaite Color: |
Black, Steel gray. |
Density: |
6.91 |
Diaphaneity: |
Opaque |
Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
Habit: |
Fibrous - Crystals made up of fibers. |
Habit: |
Platy - Sheet forms (e.g. micas). |
Hardness: |
4 - Fluorite |
Luster: |
Metallic |
Streak: |
lead gray |
| Optical Properties of Paderaite RL Anisotrophism: |
Moderate. |
RL Color: |
Creamy white. |
| Calculated Properties of Paderaite Electron Density: |
Bulk Density (Electron Density)=5.66 gm/cc |
note: Specific Gravity of Paderaite =6.69 gm/cc. Fermion Index: |
Fermion Index = 0.01 |
Boson Index = 0.99 Photoelectric: |
PEPaderaite =1,316.19 barns/electron |
U=PEPaderaite x rElectron Density=7,449.53 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Paderaite is Not Radioactive | Paderaite Classification Dana Class: |
03.08.04.02 (03)Sulfides - Sulfosalts |
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(03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.08.04)Dana Group |
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Strunz Class: |
02.JA.10e 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JA -Galena derivatives with little or no Pb |
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| Other Paderaite Information References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Dana8, AmMin 91:1953) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Paderaite : |
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 15 - WWW-MINCRYST Search for Paderaite using: Visit our Advertisers for Paderaite : A Bijoux Google Search for PaderaiteAdam's Minerals Google Search for Paderaite Cape Minerals Google Search for Paderaite Dakota Matrix Minerals Google Search for Paderaite Excalibur Mineral Corp. Google Search for Paderaite Exceptional Minerals Google Search for Paderaite John Betts Fine Minerals Search for Paderaite McDougall Minerals Google Search for Paderaite Mineral News Website Link Rock and Mineral Shows Google Search for Paderaite Weinrich Minerals, Inc. Google Search for Paderaite Ask about Paderaite here : Print or Cut-and-Paste your Paderaite Specimen Label here :
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