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Giessenite Mineral Data
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General Giessenite Information
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 Chemical Formula: |
Pb13(Cu,Ag)(Bi,Sb)9S28 (?) |
| Composition: |
Molecular Weight = 5,459.67 gm |
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Copper 0.87 % Cu |
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Silver 0.49 % Ag |
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Bismuth 30.62 % Bi |
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Antimony 2.23 % Sb |
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Lead 49.34 % Pb |
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Sulfur 16.45 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb13Cu0.75Ag0.25Bi8SbS28 |
| Environment: |
Hydrothermal origin, with other sulfides. |
| IMA Status: |
Approved IMA 1963 |
| Locality: |
From Turtschi, between Giessen and Binn, about 2 km from the Lengenbach quarry, Binntal, Valais, Switzerland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Giessen, a village nearby the Binntal, Switzerland. |
| Name Pronunciation: |
Giessenite + Pronunciation  |
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Giessenite Image |
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Images:
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Giessenite Crystallography
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| Axial Ratios: |
a:b:c =0.9038:1:0.1068 |
| Cell Dimensions: |
a = 34.51, b = 38.18, c = 4.08, Z = 4; beta = 90° V = 5,375.77 Den(Calc)= 6.75 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n |
| X Ray Diffraction: |
By Intensity(I/Io): 3.62(1), 3.15(0.5), 3.32(0.5), |
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Physical Properties of Giessenite
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| Color: |
Grayish black. |
| Density: |
7.45 |
| Diaphaneity: |
Opaque |
| Habit: |
Acicular - Occurs as needle-like crystals. |
| Habit: |
Pseudo Orthorhombic - Crystals show an orthorhombic shape. |
| Hardness: |
2.5 - Finger Nail |
| Luster: |
Metallic |
| Streak: |
grayish black |
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Calculated Properties of Giessenite
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| Electron Density: |
Bulk Density (Electron Density)=5.59 gm/cc
note: Specific Gravity of Giessenite =6.75 gm/cc.
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| Fermion Index: |
Fermion Index = 0.11
Boson Index = 0.89 |
| Photoelectric: |
PEGiessenite =1,519.12 barns/electron
U=PEGiessenite x rElectron Density=8,498.62 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Giessenite is Not Radioactive |
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Giessenite Classification
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| Dana Class: |
03.05.12.02 (03)Sulfides - Sulfosalts |
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(03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.05.12)Dana Group |
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03.05.12.01 Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m |
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03.05.12.02 Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 21/n 2/m |
| Strunz Class: |
02.HB.10b 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.10b Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 21/n 2/m |
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02.HB.10b Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m |
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Other Giessenite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Giessenite :
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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Giessenite
Pb13(Cu,Ag)(Bi,Sb)9S28 (?)
Dana No: 03.05.12.02 Strunz No: 02.HB.10b
Locality:
Notes:
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