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Schumacherite Mineral Data + |
General Schumacherite Information |
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| Bi3[(V,As,P)O4]2O(OH) | |||
| Molecular Weight = 900.22 gm | |||
| Vanadium 6.79 % V 12.12 % V2O5 | |||
| Bismuth 69.64 % Bi 77.64 % Bi2O3 | |||
| Arsenic 4.99 % As 7.66 % As2O5 | |||
| Phosphorus 0.69 % P 1.58 % P2O5 | |||
| Hydrogen 0.11 % H 1.00 % H2O | |||
| Oxygen 17.77 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Bi3(VO4)1.2(AsO4)0.6(PO4)0.2O(OH) | |||
| Probable series with preisingerite. | |||
| Approved IMA 1983 | |||
| Schneeberg, Germany Link to MinDat.org Location Data. | |||
| Named for Friedrich Schumacher, professor, University of Freiberg and Bonn, Germany | |||
Schumacherite Image | |||
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Schumacherite Crystallography |
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| a:b:c =1.3471:1:0.9249 | |||
| a = 10.05, b = 7.46, c = 6.9, Z = 2; alpha = 87.7°, beta = 115.3°, gamma = 111.5° V = 434.80 Den(Calc)= 6.88 | |||
| Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | |||
| By Intensity(I/Io): 3.28(1), 3.09(0.8), 3.19(0.8), | |||
Physical Properties of Schumacherite |
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| None | |||
| Yellow, Yellow brown. | |||
| 6.9 | |||
| Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | |||
| Tabular - Form dimensions are thin in one direction. | |||
| 3 - Calcite | |||
| Adamantine | |||
| light yellow | |||
Optical Properties of Schumacherite |
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| CI meas= -0.038 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.186,KPDmeas= 0.1855,KC= 0.1787 |
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| Biaxial (+), a=2.2, g=2.3-2.42, bire=0.1000-0.2200, 2V(Meas)=~90. | |||
Calculated Properties of Schumacherite |
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relectron=5.83 gm/cc |
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| Fermion Index = 0.00025 Boson Index = 0.99975 |
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PESchumacherite =1,331.50 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Schumacherite is Not Radioactive |
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Schumacherite Classification |
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| 41.10.9.2 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen | |||
| (41.10)where (A++ B++)3 (XO4)2 Zq | |||
| (41.10.9)Dana Group | |||
| VII/B.30-20 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.30 - Petitjeanite - Kuznetsovite series | |||
Other Schumacherite Information |
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| NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | |||
| Links to other databases for Schumacherite : 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 Schumacherite using: Visit our Advertisers for Schumacherite : Translate Schumacherite Mineral Data : Ask about Schumacherite here : Print or Cut-and-Paste your Schumacherite Specimen Label here :
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