Mineralogy Database

Bismutoferrite Mineral Data

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General Bismutoferrite Information

Help on Chemical  Formula: Chemical Formula: BiFe+++2(SiO4)2(OH)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: BiFe3+2(SiO4)2(OH)
Help on Environment: Environment: Isostructural with Sb analog, chapmanite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1871
Help on Locality: Locality: Schneeserg, Saxony, Germay. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in allusion to the composition.
Help on Name Pronunciation: Name Pronunciation: Bismutoferrite + Pronunciation Say BISMUTOFERRITE
Help on Synonym: Synonym: ICSD 200069
  PDF 11-174

Bismutoferrite Image

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Comments: Yellow-greenish, earthy bismutoferrite.
Location: Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Specimen size 8.5 cm.
© Thomas Witzke / Abraxas-Verlag

Bismutoferrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5776:1:0.858
Help on Cell Dimensions: Cell Dimensions: a = 5.21, b = 9.02, c = 7.74, Z = 2; beta = 100.67° V = 357.45 Den(Calc)= 4.85
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.87(1), 7.63(1), 2.9(0.7),

Physical Properties of Bismutoferrite

Help on Color: Color: Green, Light yellow.
Help on Density: Density: 4.47
Help on Diaphaneity: Diaphaneity: Translucent to opaque
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Adamantine - Resinous

Optical Properties of Bismutoferrite

Help on Gladstone-Dale: 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
Ncalc = 1.98 - 2.06
Help on Optical Data: Optical Data: Biaxial (?), a=1.93, b=1.97, g=2.01, bire=0.0800

Calculated Properties of Bismutoferrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.04 gm/cc
note: Specific Gravity of Bismutoferrite =4.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0096974151
Boson Index = 0.9903025849
Help on Photoelectric: Photoelectric: PEBismutoferrite = 719.87 barns/electron
U=PEBismutoferrite x rElectron Density=2,910.46 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bismutoferrite is Not Radioactive

Bismutoferrite Classification

Help on  Dana Class: Dana Class: (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.01)with 1:1 layers
  (71.01.03)Bismutoferrite group Bismutoferrite BiFe2(SiO4)2(OH) Cm m Chapmanite SbFe2(SiO4)2(OH) Cm m
Help on  Strunz Class: Strunz Class: 09.ED.25 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.ED -Phyllosilicates with kaolinite layers
09.ED.25 Bismutoferrite BiFe2(SiO4)2(OH) Cm m
09.ED.25 Chapmanite SbFe2(SiO4)2(OH) Cm m

Other Bismutoferrite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Bismutoferrite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.ED.25





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