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Bjarebyite Mineral Data + |
General Bjarebyite Information |
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| (Ba,Sr)(Mn++,Fe++,Mg)2Al2(PO4)3(OH)3 | |||
| Molecular Weight = 648.89 gm | |||
| Barium 23.28 % Ba 25.99 % BaO | |||
| Strontium 1.35 % Sr 1.60 % SrO | |||
| Magnesium 0.75 % Mg 1.24 % MgO | |||
| Manganese 7.62 % Mn 9.84 % MnO | |||
| Aluminum 7.48 % Al 14.14 % Al2O3 | |||
| Iron 7.75 % Fe 9.96 % FeO | |||
| Phosphorus 14.32 % P 32.81 % P2O5 | |||
| Hydrogen 0.47 % H 4.16 % H2O | |||
| Oxygen 36.98 % O | |||
| ______ ______ | |||
| 100.00 % 99.75 % = TOTAL OXIDE | |||
| Ba1.1Sr0.1Al1.8Mn2+0.9Fe2+0.9Mg0.2(PO4)3(OH)3 | |||
| Late-stage reaction product of triphylite and amblygonite in complex granite pegmatites. | |||
| Approved IMA 1973 | |||
| Palermo #1 mine, near North Groton, Grafton County, New Hampshire, USA. Link to MinDat.org Location Data. | |||
| Named for Alfred Gunnar Bjareby (1899-1967), Swedish-American student of New England pegmatite minerals. | |||
| ICSD 6207 | |||
| PDF 29-171 | |||
Bjarebyite Image | |||
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Bjarebyite Crystallography |
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| a:b:c =0.7396:1:0.4072 | |||
| a = 8.93, b = 12.073, c = 4.917, Z = 2; beta = 100.15° V = 521.81 Den(Calc)= 4.13 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m | |||
| By Intensity(I/Io): 3.09(1), 2.681(0.7), 8.81(0.7), | |||
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Physical Properties of Bjarebyite |
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| [010] Perfect, [100] Perfect | |||
| Emerald green. | |||
| 4.02 | |||
| Transparent to Translucent | |||
| Acicular - Occurs as needle-like crystals. | |||
| Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | |||
| Striated - Parallel lines on crystal surface or cleavage face. | |||
| 4 - Fluorite | |||
| Subadamantine | |||
| white | |||
Optical Properties of Bjarebyite |
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| CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.058 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1692,KPDmeas= 0.1739,KC= 0.1797 |
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| Biaxial (+), a=1.692, b=1.695, g=1.71, bire=0.0180, 2V(Calc)=50, 2V(Meas)=35. | |||
| colorless or pale brownish yellow. | |||
| brownish green. | |||
| olive green or apple green. | |||
Calculated Properties of Bjarebyite |
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relectron=3.78 gm/cc |
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| Fermion Index = 0.045 Boson Index = 0.955 |
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PEBjarebyite = 106.11 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bjarebyite is Not Radioactive |
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Bjarebyite Classification |
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| 41.9.1.3 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen | |||
| (41.9)where (A B)5 (XO4)3 Zq | |||
| (41.9.1)Dana Group | |||
| VII/B.29-30 VII - Phosphates, Arsenates and Vanadates | |||
| VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb | |||
| VII/B.29 - Bjarebyite group | |||
Other Bjarebyite Information |
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| NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4) | |||
| Links to other databases for Bjarebyite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris Search for Bjarebyite using: Visit our Advertisers for Bjarebyite : Translate Bjarebyite Mineral Data : Ask about Bjarebyite here : Print or Cut-and-Paste your Bjarebyite Specimen Label here :
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