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Theisite Mineral Data |
General Theisite Information |
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Cu5Zn5[(As+++++,Sb+++++)O4]2(OH)14 | ||
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Molecular Weight = 1,184.04 gm | ||
Zinc 27.61 % Zn 34.37 % ZnO | |||
Copper 26.83 % Cu 33.59 % CuO | |||
Antimony 5.14 % Sb 6.83 % Sb2O5 | |||
Arsenic 9.49 % As 14.56 % As2O5 | |||
Hydrogen 1.19 % H 10.65 % H2O | |||
Oxygen 29.73 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
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Cu5Zn5(AsO4)1.5(SbO4)0.5(OH)14 | ||
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Found in a uranium prospect. | ||
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Approved IMA 1982 | ||
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Durango, La Plata, County, Colorade, USA. Link to MinDat.org Location Data. | ||
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Named for Nicholas J. Theis, Geologist, Bendix Corp., who discovered the orignal sample. | ||
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Theisite ![]() |
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Theisite Image | |||
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Theisite Crystallography |
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a:b:c =1.1547:1:2.1016 | ||
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a = 8.225, b = 7.123, c = 14.97, Z = 2; V = 877.04 Den(Calc)= 4.48 | ||
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Orthorhombic Space Group: pseudo-HEX | ||
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By Intensity(I/Io): 3.741(1), 2.534(0.9), 14.973(0.9), | ||
Physical Properties of Theisite |
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{001} Perfect | ||
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Blue green, Green. | ||
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4.3 | ||
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Translucent | ||
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Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). | ||
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Aggregates - Made of numerous individual crystals or clusters. | ||
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1.5 - Between Talc and Gypsum | ||
Optical Properties of Theisite |
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CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.048 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.173,KPDmeas= 0.1802,KC= 0.1817 Ncalc = 1.78 - 1.81 |
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Biaxial (-), a=1.755, b=1.785, g=1.785, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0. | ||
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none. | ||
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none. | ||
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none. | ||
Calculated Properties of Theisite |
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Bulk Density (Electron Density)=4.07 gm/cc note: Specific Gravity of Theisite =4.30 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PETheisite = 48.41 barns/electron U=PETheisite x rElectron Density= 196.91 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Theisite is Not Radioactive |
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Theisite Classification |
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41.01.02.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen | ||
(41.01)where (A++)m (XO4)p Zq, with m:p>4:1 | |||
(41.01.02)Dana Group | |||
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08.BE.75 08 - PHOSPHATES, ARSENATES, VANADATES | ||
08.B - Phosphates, etc. with Additional Anions, without H2O | |||
08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1 | |||
Other Theisite Information |
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NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
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Links to other databases for Theisite : 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 Theisite using: Visit our Advertisers for Theisite : Ask about Theisite here : Print or Cut-and-Paste your Theisite Specimen Label here :
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