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Pararobertsite Mineral Data + |
General Pararobertsite Information |
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| Ca2Mn+++3(PO4)3O2·3(H2O) | |||
| Molecular Weight = 615.93 gm | |||
| Calcium 13.01 % Ca 18.21 % CaO | |||
| Manganese 26.76 % Mn 38.45 % Mn2O3 | |||
| Phosphorus 15.09 % P 34.57 % P2O5 | |||
| Hydrogen 0.98 % H 8.77 % H2O | |||
| Oxygen 44.16 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Ca2Mn3+3(PO4)3O2·3(H2O) | |||
| Approved IMA 1989 | |||
| Link to MinDat.org Location Data. | |||
| ICSD 89712 | |||
| PDF 45-1440 | |||
Search for Pararobertsite Images | |||
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Pararobertsite Crystallography |
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| a:b:c =0.6656:1:0.8362 | |||
| a = 8.825, b = 13.258, c = 11.087, Z = 4; beta = 101.19° V = 1,272.54 Den(Calc)= 3.21 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c | |||
| By Intensity(I/Io): 8.69(1), 2.884(0.6), 5.66(0.6), | |||
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Physical Properties of Pararobertsite |
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| [100] Perfect | |||
| Bronze, Yellow, Dark red. | |||
| 3.22 | |||
| Transparent | |||
| 2 - Gypsum | |||
| Vitreous (Glassy) | |||
| brown red | |||
Optical Properties of Pararobertsite |
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| CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2523,KPDmeas= 0.2516,KC= 0.2471 |
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| Biaxial (-), a=1.79, b=1.81, g=1.83, bire=0.0400, 2V(Calc)=88, 2V(Meas)=84. | |||
Calculated Properties of Pararobertsite |
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relectron=3.16 gm/cc |
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| Fermion Index = 0.00038 Boson Index = 0.99962 |
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PEPararobertsite = 9.13 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pararobertsite is Not Radioactive |
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Pararobertsite Classification |
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| 42.8.5.2 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | |||
| (42.8)where (AB)7 (XO4)4 Zq · x(H2O) | |||
| (42.8.5)Dana Group | |||
| VII/D.30-60 VII - Phosphates, Arsenates and Vanadates | |||
| VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K | |||
| VII/D.30 - Mitridatite series | |||
Other Pararobertsite Information |
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| PHYS. PROP.(Am.Min.,Vol.75,p1211,1990) OPTIC PROP.(Am.Min.,Vol.75,p1211,1990) | |||
| Links to other databases for Pararobertsite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris Search for Pararobertsite using: Visit our Advertisers for Pararobertsite : Translate Pararobertsite Mineral Data : Ask about Pararobertsite here : Print or Cut-and-Paste your Pararobertsite Specimen Label here :
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