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Brumadoite Mineral Data |
General Brumadoite Information |
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Cu3(TeO4)(OH)4•5H2O | |
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Molecular Weight = 535.15 gm | |
Calcium 0.07 % Ca 0.10 % CaO | ||
Copper 34.44 % Cu 43.11 % CuO | ||
Silicon 0.26 % Si 0.56 % SiO2 | ||
Tellurium 22.17 % Te 27.74 % TeO2 | ||
Hydrogen 2.64 % H 23.56 % H2O | ||
Lead 1.55 % Pb 1.67 % PbO | ||
Oxygen 38.87 % O | ||
______ ______ | ||
100.00 % 96.74 % = TOTAL OXIDE | ||
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Cu2.9Pb0.04Ca0.01Te0.93Si0.05O4(OH)4•5(H2O) | |
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Approved IMA 2008 (Dana # Added) | |
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Pedra Preta mine, Serra das eguas, Brumado, Bahia, Brazil Link to MinDat.org Location Data. | |
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Named for the locality. | |
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IMA2008-028 | |
Brumadoite Crystallography |
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a:b:c =1.4864:1:1.3185 | |
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a = 8.629, b = 5.805, c = 7.654, Z = 2; beta = 103.17° V = 373.32 Den(Calc)= 4.76 | |
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Monoclinic Space Group: P 21/m or P 21 | |
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By Intensity(I/Io): 8.432(1), 3.162(0.66), 2.385(0.27),1.666(0.14), 2.291(0.12), 1.916(0.11), 1.45(0.1), 1.452(0.1), | |
Physical Properties of Brumadoite |
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Blue. | |
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Transparent to Translucent | |
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Vitreous (Glassy) | |
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pale blue | |
Optical Properties of Brumadoite |
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NCalc= 2.01 - from Gladstone-Dale relationship (KC = 0.2128) where Ncalc=Dcalc*KC+1 |
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Calculated Properties of Brumadoite |
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Bulk Density (Electron Density)=4.53 gm/cc note: Specific Gravity of Brumadoite =4.76 gm/cc. |
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Fermion Index = 0.02 Boson Index = 0.98 |
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PEBrumadoite = 111.84 barns/electron U=PEBrumadoite x rElectron Density= 506.61 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Brumadoite is Not Radioactive |
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Brumadoite Classification |
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33.02.06.02 (33)Selenates and Tellurates | |
(33.02)as A+ (B++)m XO6 Zq � x(H2O) where x can equal 0 | ||
(33.02.06)Dana Group | ||
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07.DE.80 07 - SULFATES (SELENATES, TELLURATES) | |
07.D - Sulfates (selenates, etc.) with additional anions, with H2O | ||
07.DE -With only medium-sized cations; unclassified | ||
Other Brumadoite Information |
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NAME( MinMag, v72:1201) PHYS. PROP.(MinMag, v72:1201) OPTIC PROP.(MinMag, v72:1201) | |
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Links to other databases for Brumadoite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Brumadoite using: Visit our Advertisers for Brumadoite :
Dakota Matrix Ask about Brumadoite here : Print or Cut-and-Paste your Brumadoite Specimen Label here :
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