Balangeroite Mineral Data + 
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- 65.3.2.1 Balangeroite (Mg,Fe,Fe,Mn)42Si16O54(OH)40 P 2/n 2/m
- 65.3.2.2a Gageite-2M (Mn,Mg,Zn)42Si16O54(OH)40 P 2/n 2/m
- 65.3.2.2b Gageite (Mn,Mg,Zn)42Si16O54(OH)40 P1 1
- VIII/F.24-10 Balangeroite (Mg,Fe,Fe,Mn)42Si16O54(OH)40 P 2/n 2/m
- VIII/F.24-12 Tiragalloite Mn4AsSi3O12(OH) P 21/n 2/m
- VIII/F.24-20* Gageite (Mn,Mg,Zn)42Si16O54(OH)40 P1 1
- VIII/F.24-20 Gageite-2M (Mn,Mg,Zn)42Si16O54(OH)40 P 2/n 2/m
- VIII/F.24-30 Raite Na3Mn3Ti0.25Si8O20(OH)2·10(H2O) C 2/m 2/m
General Balangeroite Information |
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 Chemical Formula: |
(Mg,Fe+++,Fe++,Mn++)42Si16O54(OH)40 | ||
| Composition: |
Molecular Weight = 3,377.84 gm | ||
| Magnesium 19.21 % Mg 31.86 % MgO | |||
| Manganese 2.76 % Mn 3.57 % MnO | |||
| Iron 19.51 % Fe 17.02 % FeO / 8.98 % Fe2O3 | |||
| Silicon 13.30 % Si 28.46 % SiO2 | |||
| Hydrogen 1.11 % H 9.95 % H2O | |||
| Oxygen 44.10 % O | |||
| ______ ______ | |||
| 100.00 % 99.83 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mg26.7Fe2+8Fe3+3.8Mn2+1.7Si16O55.8(OH)37.3 | ||
| Environment: |
In shistose serpentinite in proximity to a large ultramafic massif. | ||
| IMA Status: |
Approved IMA 1983 | ||
| Locality: |
Balangero (San Vittore) mine, Piedmont, Italy. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
Balangeroite Image | |||
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Images:
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Balangeroite Crystallography |
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| Axial Ratios: |
a:b:c =1:1:0.4974 | ||
| Cell Dimensions: |
a = 19.4, b = 19.4, c = 9.65, Z = 2; beta = 88.9° V = 3,631.20 Den(Calc)= 3.09 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/n | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.714(1), 6.77(0.8), 2.674(0.75),3.378(0.45), 2.516(0.4), 3.278(0.4), 9.59(0.4), | ||
Physical Properties of Balangeroite |
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| Cleavage: |
[???] Very Good, [???] Very Good | ||
| Color: |
Brownish yellow, Dark brown. | ||
| Density: |
2.96 - 3.1, Average = 3.03 | ||
| Diaphaniety: |
Subtranslucent to Opaque | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Luster: |
Vitreous - Greasy | ||
| Streak: |
brownish white | ||
Optical Properties of Balangeroite |
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| Optical Data: |
Biaxial (?), a=1.68, g=1.68, bire=0.0000 | ||
| Pleochroism (x): |
dark brown. | ||
| Pleochroism (z): |
yellow brown. | ||
Calculated Properties of Balangeroite |
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| Electron Density: |
relectron=3.07 gm/cc |
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| Fermion Index |
Fermion Index = 0.02977 Boson Index = 0.97023 |
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| Photoelectric: |
PEBalangeroite = 7.38 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Balangeroite is Not Radioactive |
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Balangeroite Classification |
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| Dana Class: |
65.3.2.1 (65)Inosilicate Single-Width Unbranched Chains, W=1 | ||
| (65.3)with chains P=4 | |||
| (65.3.2)Gageite group | |||
| Strunz Class: |
VIII/F.24-10 VIII - Silicates | ||
| VIII/F - Inosilicates (chain and band) Quadruplet chains [Si4O12]8- | |||
| VIII/F.24 - Balangeroite - Raite series | |||
Other Balangeroite Information |
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) | ||
| See Also: |
Links to other databases for Balangeroite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 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 Balangeroite using: Visit our Advertisers for Balangeroite : Translate Balangeroite Mineral Data : Ask about Balangeroite here : Print or Cut-and-Paste your Balangeroite Specimen Label here :
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