| Cornubite Mineral Data |
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- 41.4.2.1 Cornubite Cu5(AsO4)2(OH)4 P1 1
- 41.4.2.2 Cornwallite Cu5(AsO4)2(OH)4 P 21/a 2/m
- VII/B.11-10 Ludjibaite Cu5(PO4)2(OH)4 P1 1
- VII/B.11-20 Pseudomalachite Cu5(PO4)2(OH)4 P 21/a 2/m
- VII/B.11-30 Reichenbachite Cu5(PO4)2(OH)4 P 21/a 2/m
- VII/B.11-40 Cornwallite Cu5(AsO4)2(OH)4 P 21/a 2/m
- VII/B.11-50 Cornubite Cu5(AsO4)2(OH)4 P1 1
- VII/B.11-60 Turanite Cu5(VO4)2(OH)4 P1 1
- VII/B.11-65 Gatehouseite Mn5(PO4)2(OH)4 P 212121 2 2 2
- VII/B.11-70 Arsenoclasite Mn5(AsO4)2(OH)4 P 212121 2 2 2
- VII/B.11-80 Reppiaite Mn5[(V,As)O4]2(OH)4 C 2/m 2/m
General Cornubite Information |
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 Chemical Formula: |
Cu5(AsO4)2(OH)4 | ||
| Composition: |
Molecular Weight = 681.61 gm | ||
| Copper 46.61 % Cu 58.35 % CuO | |||
| Arsenic 21.98 % As 33.72 % As2O5 | |||
| Hydrogen 0.89 % H 7.93 % H2O | |||
| Oxygen 30.51 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Cu5(AsO4)2(OH)4·(H2O) | ||
| IMA Status: |
Approved IMA 1959 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 30683 | ||
| PDF 41-1460 | |||
Cornubite Image | |||
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Images:
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Cornubite Crystallography |
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| Axial Ratios: |
a:b:c =0.979:1:1.0862 | ||
| Cell Dimensions: |
a = 6.12, b = 6.251, c = 6.79, Z = 1; alpha = 92.93°, beta = 111.3°, gamma = 107.47° V = 230.55 Den(Calc)= 4.91 | ||
| Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.489(1), 2.562(1), 4.72(1), | ||
Physical Properties of Cornubite |
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| Color: |
Green, Apple green, Dark green. | ||
| Density: |
4.64 | ||
| Hardness: |
4 - Fluorite | ||
| Streak: |
greenish white | ||
Optical Properties of Cornubite |
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| Optical Data: |
NCalc= 1.89 - from Gladstone-Dale relationship (KC = 0.1808) where Ncalc=Dcalc*KC+1 NCalc= 1.84 - from Gladstone-Dale relationship (KC = 0.1808) where Ncalc=Dmeas*KC+1 |
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Calculated Properties of Cornubite |
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| Electron Density: |
relectron=4.62 gm/cc |
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| Fermion Index |
Fermion Index = 0.00014 Boson Index = 0.99986 |
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| Photoelectric: |
PECornubite = 35.97 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cornubite is Not Radioactive |
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Cornubite Classification |
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| Dana Class: |
41.4.2.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen | ||
| (41.4)where (A B)5 (XO4)2 Zq | |||
| (41.4.2)Dana Group | |||
| Strunz Class: |
VII/B.11-50 VII - Phosphates, Arsenates and Vanadates | ||
| VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds | |||
| VII/B.11 - Pseudomalachite group, Ludjibaite - Reppiaite series | |||
Other Cornubite Information |
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Cornubite : 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 - WWW-MINCRYST 14 -theimage 15 -École des Mines de Paris Search for Cornubite using: Visit our Advertisers for Cornubite : Translate Cornubite Mineral Data : Ask about Cornubite here : Print or Cut-and-Paste your Cornubite Specimen Label here :
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