Roxbyite Mineral Data + 
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- 2.4.7.1 Chalcocite Cu2S P 21/c 2/m
- 2.4.7.2 Djurleite Cu31S16 P 21/n 2/m
- 2.4.7.3 Digenite Cu9S5 R 3m 3 2/m
- 2.4.7.4 Roxbyite Cu1.78S C 2/m 2/m
- 2.4.7.5 Anilite Cu7S4 P nma 2/m 2/m 2/m
- 2.4.7.6 Geerite Cu8S5 R 3m, R 3m, or R 32 Trig
- 2.4.7.7 Spionkopite Cu1.4S P 3m1 ? 3m
- II/B.01-10 Chalcocite Cu2S P 21/c 2/m
- II/B.01-20 Djurleite Cu31S16 P 21/n 2/m
- II/B.01-30 Digenite Cu9S5 R 3m 3 2/m
- II/B.01-40 Roxbyite Cu1.78S C 2/m 2/m
- II/B.01-50 Anilite Cu7S4 P nma 2/m 2/m 2/m
- II/B.01-60 Geerite Cu8S5 R 3m, R 3m, or R 32 Trig
- II/B.01-70 Spionkopite Cu1.4S P 3m1 ? 3m
- II/B.01-80 Yarrowite Cu9S8 P 3m1 ? 3m
General Roxbyite Information |
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 Chemical Formula: |
Cu1.78S | ||
| Composition: |
Molecular Weight = 145.18 gm | ||
| Copper 77.91 % Cu | |||
| Sulfur 22.09 % S | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Cu1.78S | ||
| Environment: |
Products of corrosion of a 1375 BC bronze harpoon head from a shipwreck. | ||
| IMA Status: |
Approved IMA 1988 | ||
| Locality: |
Roxby Downs, AS, Australia. Eastern Mediterranean Sea. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named from the locality. | ||
Search for Roxbyite Images | |||
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Images:
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Roxbyite Crystallography |
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| Axial Ratios: |
a:b:c =1.7407:1:0.4323 | ||
| Cell Dimensions: |
a = 53.79, b = 30.9, c = 13.36, Z = 512; beta = 90° V = 22,205.80 Den(Calc)= 5.56 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 1.933(1), 2.375(0.9), 1.857(0.8), | ||
Physical Properties of Roxbyite |
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| Cleavage: |
[100] Poor | ||
| Color: |
Bluish black. | ||
| Density: |
5.555 | ||
| Diaphaniety: |
Opaque | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Habit: |
Powdery - Forms a loose, poorly-coherent pulverulent mass. | ||
| Hardness: |
2.5-3 - Finger Nail-Calcite | ||
| Luster: |
Metallic - Dull | ||
Optical Properties of Roxbyite |
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| RL Anisotrophism: |
Very weak. | ||
| RL Color: |
White to off-shite with a blue tinge. | ||
Calculated Properties of Roxbyite |
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| Electron Density: |
relectron=5.18 gm/cc |
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| Fermion Index |
Fermion Index = 0.00165 Boson Index = 0.99835 |
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| Photoelectric: |
PERoxbyite = 36.38 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Roxbyite is Not Radioactive |
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Roxbyite Classification |
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| Dana Class: |
2.4.7.4 (2)Sulfides - Including Selenides and Tellurides | ||
| (2.4)where Am Bn Xp, with (m+n):p=2:1 | |||
| (2.4.7)Chalcocite Group ([Cu]2-x S] formulae) | |||
| Strunz Class: |
II/B.01-40 II - Sulfides and sulphosalts | ||
| II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Coppersulfides Chalcocite group | |||
| II/B.01 - Chalcocite - Yarrowite series | |||
Other Roxbyite Information |
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| References: |
NAME( CanMin, 10/98) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) | ||
| See Also: |
Links to other databases for Roxbyite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Roxbyite using: Visit our Advertisers for Roxbyite : Translate Roxbyite Mineral Data : Ask about Roxbyite here : Print or Cut-and-Paste your Roxbyite Specimen Label here :
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