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Cornwallite Mineral Data |
General Cornwallite Information |
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Cu5(AsO4)2(OH)4 | ||
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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 | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Cu5(AsO4)2(OH)4•(H2O) | ||
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Dimorphous with cornubite. | ||
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Valid Species (Pre-IMA) 1847 | ||
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Link to MinDat.org Location Data. | ||
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Named after the English leader Cornwall. | ||
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Cornwallite + Pronunciation ![]() |
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Erinite | ||
ICSD 89035 | |||
PDF 39-1357 | |||
Cornwallite Image | |||
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Cornwallite Crystallography |
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By Intensity(I/Io): 3.22(1), 3.1(0.9), 3.53(0.9), | ||
Physical Properties of Cornwallite |
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Light green, Dark green, Black green. | ||
Optical Properties of Cornwallite |
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CI meas= -0.119 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1692,KPDmeas= 0.2024,KC= 0.1808 Ncalc = 1.72 - 1.88 |
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Calculated Properties of Cornwallite |
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Bulk Density (Electron Density)=4.60 gm/cc note: Specific Gravity of Cornwallite =4.88 gm/cc. |
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Fermion Index = 0.0001478015 Boson Index = 0.9998521985 |
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PECornwallite = 35.97 barns/electron U=PECornwallite x rElectron Density= 165.32 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cornwallite is Not Radioactive |
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Cornwallite Classification |
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41.04.02.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen | ||
(41.04)where (A B)5 (XO4)2 Zq | |||
(41.04.02)Dana Group | |||
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08.BD.05 08 - PHOSPHATES, ARSENATES, VANADATES | ||
08.B - Phosphates, etc. with Additional Anions, without H2O | |||
08.BD -With only medium-sized cations, (OH, etc.):RO4 = 2:1 | |||
Other Cornwallite Information |
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Links to other databases for Cornwallite : 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 Cornwallite using: Visit our Advertisers for Cornwallite :
Dakota Matrix Ask about Cornwallite here : Print or Cut-and-Paste your Cornwallite Specimen Label here :
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