General Barroisite Information![]() [ ](CaNa)Mg3AlFe+++Si7AlO22(OH)2 |
![]() Molecular Weight = 828.39 gm |
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Sodium 2.78 % Na 3.74 % Na2O |
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Calcium 4.84 % Ca 6.77 % CaO |
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Magnesium 8.80 % Mg 14.60 % MgO |
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Aluminum 6.51 % Al 12.31 % Al2O3 |
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Iron 6.74 % Fe 9.64 % Fe2O3 |
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Silicon 23.73 % Si 50.77 % SiO2 |
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Hydrogen 0.24 % H 2.17 % H2O |
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Oxygen 46.35 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() CaNaMg3AlFe3+(Si7AlO22)(OH)2 |
![]() In blueschist facies Metamorphic rocks. |
![]() Valid Species (Pre-IMA) 1922 |
![]() Along Cleary Creek, 20 km north of Fairbanks, and on the northwest side of Kodiak Island, Alaska, USA. Link to MinDat.org Location Data. |
![]() Not given in original paper. |
![]() Barroisite + Pronunciation |
![]() ![]() (Alumino)barroisite - of Dana |
| | Barroisite Image
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Barroisite Crystallography![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
| Physical Properties of Barroisite![]() {???} Good |
![]() Blue. |
![]() Transparent to Translucent |
![]() 5-6 - Between Apatite and Orthoclase |
![]() Vitreous (Glassy) |
| Optical Properties of Barroisite![]() |
| Calculated Properties of Barroisite![]() Fermion Index = 0.02 |
Boson Index = 0.98 ![]() PEBarroisite = 3.92 barns/electron |
U=PEBarroisite x rElectron Density= . barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Barroisite is Not Radioactive | Barroisite Classification![]() 66.01.03b.05 (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.01)with P=2 amphibole configuration |
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(66.01.03b)Group 3, the sodic-calcic amphiboles |
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![]() 09.DE.20 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family |
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| Other Barroisite Information![]() NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
![]() Links to other databases for Barroisite : |
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 Search for Barroisite using: Visit our Advertisers for Barroisite : A Bijoux Google Search for BarroisiteAdam's Minerals Google Search for Barroisite Cape Minerals Google Search for Barroisite Dakota Matrix Minerals Google Search for Barroisite Excalibur Mineral Corp. Google Search for Barroisite Exceptional Minerals Google Search for Barroisite John Betts Fine Minerals Search for Barroisite McDougall Minerals Google Search for Barroisite Mineral News Website Link Rock and Mineral Shows Google Search for Barroisite Weinrich Minerals, Inc. Google Search for Barroisite Ask about Barroisite here : Print or Cut-and-Paste your Barroisite Specimen Label here :
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