Bismutoferrite Mineral Data + 
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- 71.1.3.1 Bismutoferrite BiFe2(SiO4)2(OH) Cm m
- 71.1.3.2 Chapmanite SbFe2(SiO4)2(OH) Cm m
- VIII/B.06-10 Chapmanite SbFe2(SiO4)2(OH) Cm m
- VIII/B.06-20 Bismutoferrite BiFe2(SiO4)2(OH) Cm m
General Bismutoferrite Information |
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 Chemical Formula: |
BiFe+++2(SiO4)2(OH) | ||
| Composition: |
Molecular Weight = 521.85 gm | ||
| Iron 21.40 % Fe 30.60 % Fe2O3 | |||
| Silicon 10.76 % Si 23.03 % SiO2 | |||
| Bismuth 40.05 % Bi 44.65 % Bi2O3 | |||
| Hydrogen 0.19 % H 1.73 % H2O | |||
| Oxygen 27.59 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
BiFe3+2(SiO4)2(OH) | ||
| Environment: |
Isostructural with Sb analog, chapmanite. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1871 | ||
| Locality: |
Schneeserg, Saxony, Germay. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named in allusion to the composition. | ||
| Synonym: |
ICSD 200069 | ||
| PDF 11-174 | |||
Bismutoferrite Image | |||
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Images:
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Bismutoferrite Crystallography |
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| Axial Ratios: |
a:b:c =0.5776:1:0.858 | ||
| Cell Dimensions: |
a = 5.21, b = 9.02, c = 7.74, Z = 2; beta = 100.67° V = 357.45 Den(Calc)= 4.85 | ||
| Crystal System: |
Monoclinic - DomaticH-M Symbol (m) Space Group: Cm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.87(1), 7.63(1), 2.9(0.7), | ||
Physical Properties of Bismutoferrite |
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| Color: |
Green, Light yellow. | ||
| Density: |
4.47 | ||
| Diaphaniety: |
Translucent to opaque | ||
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. | ||
| Hardness: |
6 - Orthoclase | ||
| Luster: |
Adamantine - Resinous | ||
Optical Properties of Bismutoferrite |
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| Gladstone-Dale: |
CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.085 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2,KPDmeas= 0.217,KC= 0.2185 |
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| Optical Data: |
Biaxial (?), a=1.93, b=1.97, g=2.01, bire=0.0800 | ||
Calculated Properties of Bismutoferrite |
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| Electron Density: |
relectron=4.04 gm/cc |
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| Fermion Index |
Fermion Index = 0.00969 Boson Index = 0.99031 |
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| Photoelectric: |
PEBismutoferrite = 719.87 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bismutoferrite is Not Radioactive |
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Bismutoferrite Classification |
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| Dana Class: |
71.1.3.1 (71)Phyllosilicate Sheets of Six-Membered Rings | ||
| (71.1)with 1:1 layers | |||
| (71.1.3)Bismutoferrite group | |||
| Strunz Class: |
VIII/B.06-20 VIII - Silicates | ||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6] | |||
| VIII/B.06 - Chapmanite - Bismutoferrite series | |||
Other Bismutoferrite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Bismutoferrite : 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 (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris Search for Bismutoferrite using: Visit our Advertisers for Bismutoferrite : Translate Bismutoferrite Mineral Data : Ask about Bismutoferrite here : Print or Cut-and-Paste your Bismutoferrite Specimen Label here :
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