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General Geerite Information |
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 Chemical Formula: |
Cu8S5 | ||
| Composition: |
Molecular Weight = 668.70 gm | ||
| Copper 76.02 % Cu | |||
| Sulfur 23.98 % S | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Cu8S5 | ||
| Environment: |
Replacing sphalerite along cleavage traces. | ||
| IMA Status: |
Approved IMA 1980 | ||
| Locality: |
In DeKalb Township, St. Lawrence Co., New York, and from Cuchillo, Winston district, Sierra Co., New Mexico, USA. Link to MinDat.org Location Data. | ||
| Name Origin: |
To honor the original collector, Adam Geer, of Utica, New York, USA. | ||
| Name Pronunciation: |
Geerite  |
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Search for Geerite Images | |||
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Images:
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Geerite Crystallography |
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| Axial Ratios: |
a:c = 1:12.22976 | ||
| Cell Dimensions: |
a = 3.83, c = 46.84, Z = 3; V = 595.04 Den(Calc)= 5.60 | ||
| Crystal System: |
TrigonalSpace Group: R 3m, R 3m, or R 32 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.128(1), 1.918(0.5), 1.637(0.3), | ||
Physical Properties of Geerite |
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| Color: |
White, Blue gray. | ||
| Diaphaneity: |
Opaque | ||
| Habit: |
Platy - Sheet forms (e.g. micas). | ||
| Hardness: |
3.5-4 - Copper Penny-Fluorite | ||
| Luster: |
Metallic | ||
Optical Properties of Geerite |
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| RL Anisotrophism: |
Moderate, in yellow. | ||
| RL Color: |
Bluish white. | ||
| RL Pleochroism: |
Weak. | ||
Calculated Properties of Geerite |
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| Electron Density: |
Bulk Density (Electron Density)=5.23 gm/cc note: Specific Gravity of Geerite =5.60 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0017982333 Boson Index = 0.9982017667 |
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| Photoelectric: |
PEGeerite = 35.58 barns/electron U=PEGeerite x rElectron Density= 185.91 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Geerite is Not Radioactive |
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Geerite Classification |
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| Dana Class: |
02.04.07.06 (02)Sulfides - Including Selenides and Tellurides | ||
| (02.04)where Am Bn Xp, with (m+n):p=2:1 | |||
| (02.04.07)Chalcocite Group ([Cu]2-x S] formulae) | |||
| Strunz Class: |
02.BA.05c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf | ||
| 02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) | |||
| 02.BA -With Cu, Ag, Au | |||
Other Geerite Information |
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(AntBidBlaNic1) OPTIC PROP.(AntBidBlaNic1) | ||
| See Also: |
Links to other databases for Geerite : 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 Search for Geerite using: Visit our Advertisers for Geerite : A Bijoux Google Search for GeeriteAdam's Minerals Google Search for Geerite Cape Minerals Google Search for Geerite Dakota Matrix Minerals Google Search for Geerite Excalibur Mineral Corp. Google Search for Geerite Exceptional Minerals Google Search for Geerite John Betts Fine Minerals Search for Geerite McDougall Minerals Google Search for Geerite Mineral News Website Link Rock and Mineral Shows Google Search for Geerite Weinrich Minerals, Inc. Google Search for Geerite Ask about Geerite here : Print or Cut-and-Paste your Geerite Specimen Label here :
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