Baumhauerite-2a Mineral Data + 
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- 3.6.13.1 Baumhauerite Pb3As4S9 P1 1
- 3.6.13.2 Baumhauerite-2a ! Pb3As4S9 Unk 2/m
- II/E.24-10 Baumhauerite Pb3As4S9 P1 1
- II/E.24-15 Baumhauerite-2a Pb3As4S9 Unk 2/m
- II/E.24-20 Robinsonite Pb4Sb6S13 I2/m 2/m
General Baumhauerite-2a Information |
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 Chemical Formula: |
Pb3As4S9 | ||
| Composition: |
Molecular Weight = 1,209.88 gm | ||
| Arsenic 24.77 % As | |||
| Lead 51.38 % Pb | |||
| Sulfur 23.85 % S | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Pb3As4S9 | ||
| IMA Status: |
Approved IMA 1990 (Dana # Added) | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Name Origin: |
Named as the monoclinic polymorph of baumhauerite. | ||
Baumhauerite-2a Image | |||
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Images:
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Baumhauerite-2a Crystallography |
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| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: Unk | ||
Physical Properties of Baumhauerite-2a |
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| Color: |
Steel gray. | ||
| Diaphaniety: |
Opaque | ||
| Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. | ||
| Hardness: |
3 - Calcite | ||
| Luster: |
Metallic | ||
| Streak: |
reddish brown | ||
Calculated Properties of Baumhauerite-2a |
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| Fermion Index |
Fermion Index = 0.11533 Boson Index = 0.88467 |
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| Photoelectric: |
PEBaumhauerite-2a = 933.98 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Baumhauerite-2a is Not Radioactive |
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Baumhauerite-2a Classification |
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| Dana Class: |
3.6.13.2 (3)Sulfides - Sulfosalts | ||
| (3.6)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals | |||
| (3.6.13)Dana Group | |||
| Strunz Class: |
II/E.24-15 II - Sulfides and sulphosalts | ||
| II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with Arsen and Antimon x = 2.3 - 1.8 | |||
| II/E.24 - Baumhauerite - Robinsonite series | |||
Other Baumhauerite-2a Information |
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| See Also: |
Links to other databases for Baumhauerite-2a : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas Search for Baumhauerite-2a using: Visit our Advertisers for Baumhauerite-2a : Translate Baumhauerite-2a Mineral Data : Ask about Baumhauerite-2a here : Print or Cut-and-Paste your Baumhauerite-2a Specimen Label here :
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