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Brumadoite Mineral Data
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General Brumadoite Information
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 Chemical Formula: |
Cu3(TeO4)(OH)4•5H2O |
| Composition: |
Molecular Weight = 535.15 gm |
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Calcium 0.07 % Ca 0.10 % CaO |
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Copper 34.44 % Cu 43.11 % CuO |
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Silicon 0.26 % Si 0.56 % SiO2 |
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Tellurium 22.17 % Te 27.74 % TeO2 |
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Hydrogen 2.64 % H 23.56 % H2O |
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Lead 1.55 % Pb 1.67 % PbO |
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Oxygen 38.87 % O |
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______ ______ |
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100.00 % 96.74 % = TOTAL OXIDE |
| Empirical Formula: |
Cu2.9Pb0.04Ca0.01Te0.93Si0.05O4(OH)4•5(H2O) |
| IMA Status: |
Approved IMA 2008 (Dana # Added) |
| Locality: |
Pedra Preta mine, Serra das eguas, Brumado, Bahia, Brazil Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA2008-028 |
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Brumadoite Crystallography
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| Axial Ratios: |
a:b:c =1.4864:1:1.3185 |
| Cell Dimensions: |
a = 8.629, b = 5.805, c = 7.654, Z = 2; beta = 103.17° V = 373.32 Den(Calc)= 4.76 |
| Crystal System: |
Monoclinic Space Group: P 21/m or P 21 |
| X Ray Diffraction: |
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), |
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Physical Properties of Brumadoite
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| Color: |
Blue. |
| Diaphaneity: |
Transparent to Translucent |
| Luster: |
Vitreous (Glassy) |
| Streak: |
pale blue |
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Optical Properties of Brumadoite
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| Optical Data: |
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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| Electron Density: |
Bulk Density (Electron Density)=4.53 gm/cc
note: Specific Gravity of Brumadoite =4.76 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEBrumadoite = 111.84 barns/electron
U=PEBrumadoite x rElectron Density= 506.61 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brumadoite is Not Radioactive |
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Brumadoite Classification
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| Dana Class: |
33.02.06.02 (33)Selenates and Tellurates |
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(33.02)as A+ (B++)m XO6 Zq � x(H2O) where x can equal 0 |
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(33.02.06)Dana Group |
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33.02.06.01 Jensenite Cu3TeO6•2(H2O) P 21/n 2/m |
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33.02.06.02 Brumadoite! Cu3(TeO4)(OH)4•5H2O P 21/m or P 21 Mono |
| Strunz Class: |
07.DE.80 07 - SULFATES (SELENATES, TELLURATES) |
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07.D - Sulfates (selenates, etc.) with additional anions, with H2O |
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07.DE -With only medium-sized cations; unclassified |
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07.DE.80 Brumadoite! Cu3(TeO4)(OH)4•5H2O P 21/m or P 21 Mono |
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Other Brumadoite Information
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| References: |
NAME( MinMag, v72:1201) PHYS. PROP.(MinMag, v72:1201) OPTIC PROP.(MinMag, v72:1201) |
| See Also: |
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
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Print or Cut-and-Paste your Brumadoite Specimen Label here :
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Brumadoite
Cu3(TeO4)(OH)4•5H2O
Dana No: 33.02.06.02 Strunz No: 07.DE.80
Locality:
Notes:
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