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Paderaite Mineral Data
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General Paderaite Information
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 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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Paderaite Crystallography
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| 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 - Prismatic H-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), |
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Physical Properties of Paderaite
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| 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 |
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Optical Properties of Paderaite
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| RL Anisotrophism: |
Moderate. |
| RL Color: |
Creamy white. |
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Calculated Properties of Paderaite
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| Electron Density: |
Bulk Density (Electron Density)=5.66 gm/cc
note: Specific Gravity of Paderaite =6.69 gm/cc.
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| 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.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paderaite is Not Radioactive |
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Paderaite Classification
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| 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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03.08.04.01 Hodrushite Cu8Bi12S22 A2/m 2/m |
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03.08.04.02 Paderaite Cu7((Cu,Ag)0.33Pb1.33Bi11.33)13S22 P 21/m 2/m |
| 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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02.JA.10e Paderaite Cu7((Cu,Ag)0.33Pb1.33Bi11.33)13S22 P 21/m 2/m |
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Other Paderaite Information
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| 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
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Print or Cut-and-Paste your Paderaite Specimen Label here :
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Paderaite
Cu7((Cu,Ag)0.33Pb1.33Bi11.33)13S22
Dana No: 03.08.04.02 Strunz No: 02.JA.10e
Locality:
Notes:
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