Orpheite Mineral Data + 
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- 43.4.1.1 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
- 43.4.1.2 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
- 43.4.1.3 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
- 43.4.1.4 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
- 43.4.1.5 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
- 43.4.1.6 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
- 43.4.1.7 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
- 43.4.1.8 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
- 43.4.1.9 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
- 43.4.1.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
- VII/B.35-10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m
- VII/B.35-20 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
- VII/B.35-30 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
- VII/B.35-40 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
- VII/B.35-60 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
- VII/B.35-65 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
- VII/B.35-70 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
- VII/B.35-75 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
- VII/B.35-80 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
- VII/B.35-90 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
General Orpheite Information |
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 Chemical Formula: |
PbAl3(PO4,SO4)2(OH)6 (?) | ||
| Composition: |
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 | |||
| Empirical Formula: |
PbAl3(PO4)1.5(SO4)0.5(OH)6 | ||
| IMA Status: |
Approved IMA 1971 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
Orpheite Image | |||
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Images:
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Orpheite Crystallography |
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| Axial Ratios: |
a:c = 1:2.38857 | ||
| Cell Dimensions: |
a = 7, c = 16.72, Z = 3; V = 709.52 Den(Calc)= 4.08 | ||
| Crystal System: |
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 5.66(1), 2.96(0.95), 3.5(0.65), | ||
Physical Properties of Orpheite |
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| Color: |
Colorless, Gray, Gray blue, Yellow green, Light blue. | ||
| Density: |
3.75 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Hardness: |
3.5 - Copper Penny | ||
| Luminescence: |
Fluorescent. | ||
| Streak: |
white | ||
Optical Properties of Orpheite |
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| Dichroism (e): |
colorless. | ||
| Dichroism (w): |
colorless. | ||
| Gladstone-Dale: |
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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| Optical Data: |
Uniaxial (+), w=1.67, e=1.691, bire=0.0210. | ||
Calculated Properties of Orpheite |
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| Electron Density: |
relectron=3.48 gm/cc |
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| Fermion Index |
Fermion Index = 0.07925 Boson Index = 0.92075 |
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| Photoelectric: |
PEOrpheite = 591.17 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Orpheite is Not Radioactive |
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Orpheite Classification |
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| Dana Class: |
43.4.1.4 (43)Compound Phosphates, etc. | ||
| (43.4)(Anhydrous Compound Anions With Hydroxyl or Halogen) | |||
| (43.4.1)Dana Group | |||
| Strunz Class: |
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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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
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 : AA Mineral SpecimensB & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Orpheite Mineral Data : Ask about Orpheite here : Print or Cut-and-Paste your Orpheite Specimen Label here :
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