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Orebroite-VIII Mineral Data
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General Orebroite-VIII Information
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Chemical Formula: |
Mn++3(Sb+++++,Fe+++)SiO4(O,OH)3 |
Composition: |
Molecular Weight = 383.03 gm |
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Manganese 43.03 % Mn 55.56 % MnO |
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Iron 7.29 % Fe 10.42 % Fe2O3 |
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Silicon 7.33 % Si 15.69 % SiO2 |
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Antimony 12.71 % Sb 16.89 % Sb2O5 |
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Hydrogen 0.39 % H 3.53 % H2O |
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Oxygen 29.24 % O |
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______ ______ |
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100.00 % 102.09 % = TOTAL OXIDE |
Empirical Formula: |
Mn2+3Fe3+0.5Sb0.4(SiO4)O1.5(OH)1.5 |
Environment: |
Fine grained aggregate in antimonates. |
IMA Status: |
Approved IMA 1986 |
Locality: |
At the Sjo mine, near Grythyttan, Orebro, Sweden. Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
Name Pronunciation: |
Orebroite-VIII + Pronunciation |
Synonym: |
Oerebroite |
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Orebroite-VIII Crystallography
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Axial Ratios: |
a:c = 1:0.5812 |
Cell Dimensions: |
a = 8.183, c = 4.756, Z = 2; V = 275.80 Den(Calc)= 4.61 |
Crystal System: |
Trigonal - Pyramidal H-M Symbol (3) Space Group: P 3 |
X Ray Diffraction: |
By Intensity(I/Io): 3.096(1), 1.778(0.9), 2.334(0.7), |
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Physical Properties of Orebroite-VIII
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Color: |
Brown. |
Diaphaneity: |
Transparent to Translucent |
Fracture: |
Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern. |
Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
Hardness: |
4 - Fluorite |
Luster: |
Vitreous (Glassy) |
Magnetism: |
Weakly magnetic |
Streak: |
reddish brown |
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Optical Properties of Orebroite-VIII
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Gladstone-Dale: |
CI calc= 0.117 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1879,KC= 0.2128 Ncalc = 1.98 |
Optical Data: |
Uniaxial (+), w=1.857, e=1.875, bire=0.0180. |
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Calculated Properties of Orebroite-VIII
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Electron Density: |
Bulk Density (Electron Density)=4.33 gm/cc note: Specific Gravity of Orebroite-VIII =4.61 gm/cc. |
Fermion Index: |
Fermion Index = 0.0051107 Boson Index = 0.9948893 |
Photoelectric: |
PEOrebroite-VIII = 53.67 barns/electron U=PEOrebroite-VIII x rElectron Density= 232.40 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Orebroite-VIII is Not Radioactive |
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Orebroite-VIII Classification
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Dana Class: |
52.04.01.01 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O |
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(52.04)with cations in [6] and/or > [6] coordination |
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(52.04.01)Welinite group |
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52.04.01.01 Orebroite-VIII Mn3(Sb,Fe)SiO4(O,OH)3 P 3 3 |
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52.04.01.02 Welinite-VIII (Mn,Mg)3(W,Mn)1-x(SiO4)(O,OH)3(x=1/3) P 3 3 |
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52.04.01.03 Kittatinnyite Ca2Mn2MnSi2O8(OH)4•9(H2O) P 63/mmc 6/m 2/m 2/m |
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52.04.01.04 Franciscanite-VIII Mn3(V,[])1-x(SiO4)(O,OH)3(x=0.5) P 3 3 |
Strunz Class: |
09.JA.05 09 - SILICATES (Germanates) |
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09.J - Germanates |
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09.JA -Germanates |
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09.JA.05 Carboirite-III FeAl2GeO5(OH)2 C1 1 |
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09.JA.05 Carboirite-VIII Fe(Al,Ge)2O[(Ge,Si)O4](OH)2 C1 1 |
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09.JA.05 Orebroite-VIII Mn3(Sb,Fe)SiO4(O,OH)3 P 3 3 |
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Other Orebroite-VIII Information
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References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Orebroite-VIII :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Orebroite-VIII Specimen Label here :
Orebroite-VIII
Mn++3(Sb+++++,Fe+++)SiO4(O,OH)3
Dana No: 52.04.01.01 Strunz No: 09.JA.05
Locality:
Notes:
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