[On-Line Catalogue] [On-Line Auctions] [eBay] [Contact Us] [Policies] We specialize in fine European and Asian Mineral Specimens Heliodor is based in Prague, Czech Republic General Brianite InformationNa2CaMg(PO4)2 |
Molecular Weight = 300.31 gm |
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Sodium 15.31 % Na 20.64 % Na2O |
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Calcium 13.35 % Ca 18.67 % CaO |
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Magnesium 8.09 % Mg 13.42 % MgO |
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Phosphorus 20.63 % P 47.27 % P2O5 |
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Oxygen 42.62 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Na2CaMg(PO4)2 |
A very rare component in phosphate modules in an iron meteorite. |
Approved IMA 1967 |
In the Dayton finest (very fine-grained) octahedrite meteorite. Link to MinDat.org Location Data. |
In honor of Dr. Brian Harold Mason (1917- ), U.S. National Museum, Washington, D.C., USA, for his contributions to the study of meteorites. |
Brianite |
ICSD 408373 |
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PDF 29-1192 |
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| | Brianite Crystallographya:b:c =2.5544:1:1.7456 |
a = 13.36, b = 5.23, c = 9.13, Z = 4; beta = 91.2° V = 637.80 Den(Calc)= 3.13 |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a |
By Intensity(I/Io): 2.625(1), 2.679(0.9), 3.734(0.9), |
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| Physical Properties of BrianiteColorless. |
3 |
Transparent |
4-5 - Fluorite-Apatite |
Vitreous (Glassy) |
white |
| Optical Properties of BrianiteCI meas= -0.049 (Good) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1929,KPDmeas= 0.2012,KC= 0.1918 Ncalc = 1.58 - 1.6 Biaxial (-), a=1.598, b=1.605, g=1.608, bire=0.0100, 2V(Calc)=66, 2V(Meas)=63-65. |
| Calculated Properties of BrianiteBulk Density (Electron Density)=3.09 gm/cc |
note: Specific Gravity of Brianite =3.13 gm/cc. Fermion Index = 0.0084781832 |
Boson Index = 0.9915218168 PEBrianite = 3.06 barns/electron |
U=PEBrianite x rElectron Density= 9.43 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Brianite is Not Radioactive | Brianite Classification38.01.07.01 (38)Anhydrous Phosphates, etc |
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(38.01)A+ B++ XO4 |
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(38.01.07)Dana Group |
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08.AC.30 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.A - Phosphates, etc. without additional anions, without H2O |
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08.AC -With medium-sized and large cations |
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| Other Brianite InformationNAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
Links to other databases for Brianite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Brianite using: Visit our Advertisers for Brianite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Brianite Mineral Data : Ask about Brianite here : Print or Cut-and-Paste your Brianite Specimen Label here :
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