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General Coiraite Information |
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 Chemical Formula: |
(Pb,Sn)12.5As3Sn5FeS28 | ||
| Composition: |
Molecular Weight = 4,256.03 gm | ||
| Iron 1.44 % Fe | |||
| Silver 0.33 % Ag | |||
| Tin 17.29 % Sn | |||
| Arsenic 5.26 % As | |||
| Lead 54.57 % Pb | |||
| Sulfur 21.10 % S | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Pb11.21Sn1.3As2.99Ag0.13Fe2+1.1Sn4.9S28 | ||
| Environment: |
Franckeite solid-solution series. Coiraite has two monoclinic sub-cells, Q (pseudotetragonal) and H (pseudohexagonal). | ||
| IMA Status: |
Approved IMA 2005 (Dana # Added) | ||
| Locality: |
Pirquitas mining district, Puna Region, Rinconada Department, Jujuy Province, Argentina. Link to MinDat.org Location Data. | ||
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) | ||
| Synonym: |
IMA2005-024 | ||
Coiraite Image | |||
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Images:
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Coiraite Crystallography |
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| Axial Ratios: |
a:b:c =0.9965:1:2.9556 | ||
| Cell Dimensions: |
a = 5.84, b = 5.86, c = 17.32, Z = 1; beta = 94.14° V = 591.19 Den(Calc)= 11.95 | ||
| Crystal System: |
MonoclinicSpace Group: Unk | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.876(1), 2.068(0.6), 4.34(0.4),3.46(0.3), 3.339(0.2), 5.78(0.2), | ||
Physical Properties of Coiraite |
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| Color: |
Gray. | ||
| Diaphaneity: |
Opaque | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Colloform - Forming from a gel or colloidal mass. | ||
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. | ||
| Luster: |
Metallic | ||
| Streak: |
black | ||
Calculated Properties of Coiraite |
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| Electron Density: |
Bulk Density (Electron Density)=10.2 gm/cc note: Specific Gravity of Coiraite =12.0 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.15 Boson Index = 0.85 |
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| Photoelectric: |
PECoiraite =1,047.26 barns/electron U=PECoiraite x rElectron Density=10648.07 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Coiraite is Not Radioactive |
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Coiraite Classification |
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| Dana Class: |
03.01.04.06 (03)Sulfides - Sulfosalts | ||
| (03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals | |||
| (03.01.04)Cylindrite Group | |||
| Strunz Class: |
02.HF.25b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf | ||
| 02.H - Sulfosalts of SnS Archetype | |||
| 02.HF -With SnS and PbS archetype structure units | |||
Other Coiraite Information |
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| References: |
NAME( MinMag, v72:1083) PHYS. PROP.(MinMag, v72:1083) OPTIC PROP.(MinMag, v72:1083) | ||
| See Also: |
Links to other databases for Coiraite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Coiraite using: Visit our Advertisers for Coiraite : A Bijoux Google Search for CoiraiteAdam's Minerals Google Search for Coiraite Cape Minerals Google Search for Coiraite Dakota Matrix Minerals Google Search for Coiraite Excalibur Mineral Corp. Google Search for Coiraite Exceptional Minerals Google Search for Coiraite John Betts Fine Minerals Search for Coiraite McDougall Minerals Google Search for Coiraite Mineral News Website Link Rock and Mineral Shows Google Search for Coiraite Weinrich Minerals, Inc. Google Search for Coiraite Ask about Coiraite here : Print or Cut-and-Paste your Coiraite Specimen Label here :
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