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Orpheite Mineral Data + |
General Orpheite Information |
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| PbAl3(PO4,SO4)2(OH)6 (?) | |||
| Molecular Weight = 580.68 gm | |||
| Aluminum 13.94 % Al 26.34 % Al2O3 | |||
| Phosphorus 8.00 % P 18.33 % P2O5 | |||
| Hydrogen 1.04 % H 9.31 % H2O | |||
| Lead 35.68 % Pb 38.44 % PbO | |||
| Sulfur 2.76 % S 6.89 % SO3 | |||
| Oxygen 38.57 % O | |||
| ______ ______ | |||
| 100.00 % 99.31 % = TOTAL OXIDE | |||
| PbAl3(PO4)1.5(SO4)0.5(OH)6 | |||
| Approved IMA 1971 | |||
| Link to MinDat.org Location Data. | |||
Orpheite Image | |||
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Orpheite Crystallography |
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| a:c = 1:2.38857 | |||
| a = 7, c = 16.72, Z = 3; V = 709.52 Den(Calc)= 4.08 | |||
| Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m | |||
| By Intensity(I/Io): 5.66(1), 2.96(0.95), 3.5(0.65), | |||
Physical Properties of Orpheite |
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| Colorless, Gray, Gray blue, Yellow green, Light blue. | |||
| 3.75 | |||
| Transparent to Translucent | |||
| 3.5 - Copper Penny | |||
| Fluorescent. | |||
| white | |||
Optical Properties of Orpheite |
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| colorless. | |||
| colorless. | |||
| CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.089 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1668,KPDmeas= 0.1815,KC= 0.183 |
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| Uniaxial (+), w=1.67, e=1.691, bire=0.0210. | |||
Calculated Properties of Orpheite |
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relectron=3.48 gm/cc |
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| Fermion Index = 0.07925 Boson Index = 0.92075 |
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PEOrpheite = 591.17 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Orpheite is Not Radioactive |
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Orpheite Classification |
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| 43.4.1.4 (43)Compound Phosphates, etc. | |||
| (43.4)(Anhydrous Compound Anions With Hydroxyl or Halogen) | |||
| (43.4.1)Dana Group | |||
| VII/B.35-65 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.35 - Beudantite group | |||
Other Orpheite Information |
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| PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Orpheite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Orpheite using: Visit our Advertisers for Orpheite : Translate Orpheite Mineral Data : Ask about Orpheite here : Print or Cut-and-Paste your Orpheite Specimen Label here :
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