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Friedrichite Mineral Data
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General Friedrichite Information
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 Chemical Formula: |
Pb5Cu5Bi7S18 |
| Composition: |
Molecular Weight = 3,393.78 gm |
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Copper 9.36 % Cu |
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Bismuth 43.10 % Bi |
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Lead 30.53 % Pb |
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Sulfur 17.01 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb5Cu5Bi7S18 |
| Environment: |
As aggregates of granular crystals, in boulders of vein quartz which occur in the scree of a landslip. |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
Near the emerald beryl deposit in the "Sedl" region, east of the Haqbachtan, Salzburg, Austria. Link to MinDat.org Location Data. |
| Name Origin: |
For Professor Dr.-Ing O.M. Friedrich, of the Mining University, Leoben, Styria, Austria. |
| Name Pronunciation: |
Friedrichite + Pronunciation  |
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Friedrichite Image |
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Images:
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Friedrichite Crystallography
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| Axial Ratios: |
a:b:c =2.9047:1:0.3442 |
| Cell Dimensions: |
a = 33.84, b = 11.65, c = 4.01, Z = 6; V = 1,580.89 Den(Calc)= 21.39 |
| Crystal System: |
Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pb21m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.161(1), 3.584(1), 3.644(1), |
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Physical Properties of Friedrichite
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| Color: |
Silver gray. |
| Density: |
6.98 |
| Diaphaneity: |
Opaque |
| Hardness: |
4 - Fluorite |
| Luster: |
Metallic |
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Optical Properties of Friedrichite
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| RL Anisotrophism: |
Strong in oil, distinct in air. |
| RL Color: |
Creamy yellowish white in air, more pinkish in oil. |
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Calculated Properties of Friedrichite
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| Electron Density: |
Bulk Density (Electron Density)=18.0 gm/cc
note: Specific Gravity of Friedrichite =21.4 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PEFriedrichite =1,390.76 barns/electron
U=PEFriedrichite x rElectron Density=24964.24 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Friedrichite is Not Radioactive |
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Friedrichite Classification
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| Dana Class: |
03.04.05.05 (03)Sulfides - Sulfosalts |
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(03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.04.05)Aikinite Group (Orthorhombic containing Pb, Cu, Bi, & S) |
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03.04.05.01 Aikinite PbCuBiS3 Pbnm 2/m 2/m 2/m |
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03.04.05.02 Krupkaite PbCuBi3S6 P mc21 mm2 |
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03.04.05.03 Gladite PbCuBi5S9 P nma 2/m 2/m 2/m |
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03.04.05.04 Hammarite Pb2Cu2Bi4S9(?) Pbnm 2/m 2/m 2/m |
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03.04.05.05 Friedrichite Pb5Cu5Bi7S18 Pb21m mm2 |
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03.04.05.06 Pekoite PbCuBi11(S,Se)18 P 21am mm2 |
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03.04.05.07 Lindstromite Pb3Cu3Bi7S15 Pbnm 2/m 2/m 2/m |
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03.04.05.08 Salzburgite! Cu1.6Pb1.6Bi6.4S12 P mc21 mm2 |
| Strunz Class: |
02.HB.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HB -With Cu, Ag, Hg, Fe, Sn and Pb |
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02.HB.05a Aikinite PbCuBiS3 Pbnm 2/m 2/m 2/m |
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02.HB.05a Hammarite Pb2Cu2Bi4S9(?) Pbnm 2/m 2/m 2/m |
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02.HB.05a Gladite PbCuBi5S9 P nma 2/m 2/m 2/m |
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02.HB.05a Friedrichite Pb5Cu5Bi7S18 Pb21m mm2 |
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02.HB.05a Lindstromite Pb3Cu3Bi7S15 Pbnm 2/m 2/m 2/m |
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02.HB.05a Krupkaite PbCuBi3S6 P mc21 mm2 |
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02.HB.05a Pekoite PbCuBi11(S,Se)18 P 21am mm2 |
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02.HB.05a Paarite! Cu1.7Pb1.7Bi6.3S12 Pmcn 2/m 2/m 2/m |
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02.HB.05a Emilite! Cu2.68Pb2.68Bi5.32S12 P mc21 mm2 |
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02.HB.05a Salzburgite! Cu1.6Pb1.6Bi6.4S12 P mc21 mm2 |
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Other Friedrichite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Friedrichite :
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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Print or Cut-and-Paste your Friedrichite Specimen Label here :
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Friedrichite
Pb5Cu5Bi7S18
Dana No: 03.04.05.05 Strunz No: 02.HB.05a
Locality:
Notes:
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