General Parabariomicrolite Information Chemical Formula: |
BaTa4O10(OH)2•2H20 |
Composition: |
Molecular Weight = 1,091.16 gm |
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Barium 12.59 % Ba 14.05 % BaO |
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Tantalum 66.33 % Ta 81.00 % Ta2O5 |
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Hydrogen 0.55 % H 4.95 % H2O |
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Oxygen 20.53 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
BaTa4O10(OH)2•2(H2O) |
Environment: |
Alteration product of microlite crystals, in a decomposed zoned pegmatite. |
IMA Status: |
Approved IMA 1986 |
Locality: |
Alto do Giz pegmatite, near Parelhas, Rio Grande do Norte, Brazil. Link to MinDat.org Location Data. |
Name Origin: |
Named from the Greek for near and its relation to bariomicrolite. |
Name Pronunciation: |
Parabariomicrolite + Pronunciation |
Synonym: |
ICSD 40946 |
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PDF 39-401 |
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Images:
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| | Parabariomicrolite Crystallography Axial Ratios: |
a:c = 1:2.49091 |
Cell Dimensions: |
a = 7.429, c = 18.505, Z = 3; V = 884.46 Den(Calc)= 6.15 |
Crystal System: |
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m |
X Ray Diffraction: |
By Intensity(I/Io): 3.04(1), 3.172(0.65), 6.18(0.5), |
| Physical Properties of Parabariomicrolite Cleavage: |
{0001} Good, {1010} Good |
Color: |
White, Light pink. |
Density: |
5.97 |
Diaphaneity: |
Translucent |
Hardness: |
4 - Fluorite |
Luster: |
Vitreous - Pearly |
Streak: |
white |
| Optical Properties of Parabariomicrolite Optical Data: |
NCalc= 1.97 - from Gladstone-Dale relationship (KC = 0.1571) where Ncalc=Dcalc*KC+1 |
NCalc= 1.94 - from Gladstone-Dale relationship (KC = 0.1571) where Ncalc=Dmeas*KC+1 | Calculated Properties of Parabariomicrolite Electron Density: |
Bulk Density (Electron Density)=5.25 gm/cc |
note: Specific Gravity of Parabariomicrolite =6.15 gm/cc. Fermion Index: |
Fermion Index = 0.02 |
Boson Index = 0.98 Photoelectric: |
PEParabariomicrolite = 858.81 barns/electron |
U=PEParabariomicrolite x rElectron Density=4,511.27 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Parabariomicrolite is Not Radioactive | Parabariomicrolite Classification Dana Class: |
08.02.08.01 (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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(08.02.08)Dana Group |
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Strunz Class: |
04.FJ.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.F - Hydroxides (without V or U) |
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04.FJ -Hydroxides with H2O ± (OH); corner-sharing octahedra |
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| Other Parabariomicrolite Information References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Parabariomicrolite : |
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 Parabariomicrolite using: Visit our Advertisers for Parabariomicrolite : A Bijoux Google Search for ParabariomicroliteAdam's Minerals Google Search for Parabariomicrolite Cape Minerals Google Search for Parabariomicrolite Dakota Matrix Minerals Google Search for Parabariomicrolite Excalibur Mineral Corp. Google Search for Parabariomicrolite Exceptional Minerals Google Search for Parabariomicrolite John Betts Fine Minerals Search for Parabariomicrolite McDougall Minerals Google Search for Parabariomicrolite Mineral News Website Link Rock and Mineral Shows Google Search for Parabariomicrolite Weinrich Minerals, Inc. Google Search for Parabariomicrolite Ask about Parabariomicrolite here : Print or Cut-and-Paste your Parabariomicrolite Specimen Label here :
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