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Bahianite Mineral Data |
General Bahianite Information |
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Al5Sb+++++3O14(OH)2 | ||
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Molecular Weight = 758.16 gm | ||
Aluminum 17.79 % Al 33.62 % Al2O3 | |||
Antimony 48.18 % Sb 64.00 % Sb2O5 | |||
Hydrogen 0.27 % H 2.38 % H2O | |||
Oxygen 33.76 % O | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Al5Sb3O14(OH)2 | ||
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In potholes as stream-worn pebbles and as residual concentrates above weathered volcanic rock. | ||
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Approved IMA 1974 | ||
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About eight km southeast of the village of Paramirim das Crioulas, and elsewhere in the region around Rio do Picos das Almas, Serra das Almas, south-central Bahia, Brazil. Link to MinDat.org Location Data. | ||
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Named for the locality. | ||
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Bahianite + Pronunciation ![]() |
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ICSD 14050 | ||
PDF 29-2 | |||
Bahianite Image | |||
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Bahianite Crystallography |
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a:b:c =0.815:1:0.3821 | ||
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a = 9.406, b = 11.541, c = 4.41, Z = 2; beta = 90.94° V = 478.66 Den(Calc)= 5.26 | ||
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m | ||
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By Intensity(I/Io): 3.194(1), 3.24(1), 2.156(0.8), | ||
Physical Properties of Bahianite |
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{100} Perfect | ||
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Colorless, Violet, Cream white, Light brown. | ||
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4.89 - 5.46, Average = 5.17 | ||
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Transparent | ||
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9 - Corundum | ||
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Adamantine | ||
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white | ||
Optical Properties of Bahianite |
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CI meas= 0.046 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1648,KPDmeas= 0.1675,KC= 0.1756 Ncalc = 1.86 - 1.96 |
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Biaxial (-), a=1.81, b=1.87, g=1.92, bire=0.1100 | ||
Calculated Properties of Bahianite |
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Bulk Density (Electron Density)=4.75 gm/cc note: Specific Gravity of Bahianite =5.18 gm/cc. |
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Fermion Index = 0.0001624685 Boson Index = 0.9998375315 |
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PEBahianite = 154.92 barns/electron U=PEBahianite x rElectron Density= 735.98 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bahianite is Not Radioactive |
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Bahianite Classification |
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44.03.07.01 (44)Antimonates | ||
(44.03)with miscellaneous formulae | |||
(44.03.07)Dana Group | |||
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04.DC.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate | ||
04.D - Metal:Oxygen = 1:2 and similar | |||
04.DC -With medium-sized cations; sheets of edge-sharing octahedra | |||
Other Bahianite Information |
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NAME( AntBidBlaNic4) 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 Bahianite : 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 15 - WWW-MINCRYST Search for Bahianite using: Visit our Advertisers for Bahianite : Ask about Bahianite here : Print or Cut-and-Paste your Bahianite Specimen Label here :
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