General Bismutomicrolite Information![]() (Bi,Ca)(Ta,Nb)2O6(OH) |
![]() Molecular Weight = 589.91 gm |
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Calcium 2.72 % Ca 3.80 % CaO |
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Tantalum 52.15 % Ta 63.67 % Ta2O5 |
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Niobium 4.72 % Nb 6.76 % Nb2O5 |
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Bismuth 21.26 % Bi 23.70 % Bi2O3 |
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Hydrogen 0.17 % H 1.53 % H2O |
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Oxygen 18.99 % O |
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100.00 % 99.46 % = TOTAL OXIDE |
![]() Bi0.6Ca0.4Ta1.7Nb0.3O6(OH) |
![]() A late hydrothermal replacement of bismutotantalite in a lithium-bearing pegmatite. |
![]() Approved IMA 1977 |
![]() In the Wampewo pegmatite, Gamba Hill, near Kampala, Uganda. Link to MinDat.org Location Data. |
![]() Assigned by the IMA pyrochlore nomenclature group for the predominant bismuth content and to microlite. |
![]() Bismutomicrolite + Pronunciation |
![]() ![]() Westgrenite |
| | Bismutomicrolite Image
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Bismutomicrolite Crystallography![]() a = 10.43, Z = 8; V = 1,134.63 Den(Calc)= 6.91 |
![]() Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m |
![]() By Intensity(I/Io): 2.997(1), 1.568(0.9), 1.838(0.9), |
| Physical Properties of Bismutomicrolite![]() None |
![]() Brown, Grayish black, Yellow, Dark gray, Pink. |
![]() 6.83 |
![]() Translucent to Opaque |
![]() Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
![]() Massive - Uniformly indistinguishable crystals forming large masses. |
![]() 5 - Apatite |
![]() Resinous |
![]() gray white |
| Optical Properties of Bismutomicrolite![]() CI meas= 0.106 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.116 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1447,KPDmeas= 0.1464,KC= 0.1637 Ncalc = 2.12 - 2.13 ![]() Isotropic, n=2. |
| Calculated Properties of Bismutomicrolite![]() Bulk Density (Electron Density)=5.82 gm/cc |
note: Specific Gravity of Bismutomicrolite =6.83 gm/cc. ![]() Fermion Index = 0.0001908608 |
Boson Index = 0.9998091392 ![]() PEBismutomicrolite =1,040.41 barns/electron |
U=PEBismutomicrolite x rElectron Density=6,051.87 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Bismutomicrolite is Not Radioactive | Bismutomicrolite Classification![]() 08.02.02.05 (08)Multiple Oxides with Nb, Ta, and Ti |
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(08.02)where (A)2 (B2O6) (O,OH,F) |
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(08.02.02)Pyrochlore Group (Microlite Subgroup; Ta>Nb;(Ta+Nb)>2(Ti) |
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![]() 04.DH.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DH -With large (± medium-sized) cations; sheets of edge-sharing octahedra |
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| Other Bismutomicrolite Information![]() NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
![]() Links to other databases for Bismutomicrolite : |
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 Bismutomicrolite using: Visit our Advertisers for Bismutomicrolite : A Bijoux Google Search for BismutomicroliteAdam's Minerals Google Search for Bismutomicrolite Cape Minerals Google Search for Bismutomicrolite Dakota Matrix Minerals Google Search for Bismutomicrolite Excalibur Mineral Corp. Google Search for Bismutomicrolite Exceptional Minerals Google Search for Bismutomicrolite John Betts Fine Minerals Search for Bismutomicrolite McDougall Minerals Google Search for Bismutomicrolite Mineral News Website Link Rock and Mineral Shows Google Search for Bismutomicrolite Weinrich Minerals, Inc. Google Search for Bismutomicrolite Ask about Bismutomicrolite here : Print or Cut-and-Paste your Bismutomicrolite Specimen Label here :
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