General Aluminoferrobarroisite Information Chemical Formula: |
[ ]CaNa(Fe2+)3Al2(Si7Al)O22(OH)2 |
Composition: |
Molecular Weight = 894.15 gm |
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Sodium 2.57 % Na 3.47 % Na2O |
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Calcium 4.48 % Ca 6.27 % CaO |
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Aluminum 9.05 % Al 17.10 % Al2O3 |
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Iron 18.74 % Fe 24.11 % FeO |
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Silicon 21.99 % Si 47.04 % SiO2 |
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Hydrogen 0.23 % H 2.01 % H2O |
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Oxygen 42.94 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
CaNaFe2+3Al2(Si7AlO22)(OH)2 |
IMA Status: |
Approved IMA 1997 (Dana # Added) |
Locality: |
Link to MinDat.org Location Data. |
Name Origin: |
Named as per current IMA amphibole nomenclature (Burke and Leake 2004; Can. Mineral., 42, 1881-1883). |
| | Search for Aluminoferrobarroisite Images
Images:
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| | Aluminoferrobarroisite Crystallography Axial Ratios: |
a:b:c =0.5499:1:0.2944 |
Cell Dimensions: |
a = 9.9, b = 18, c = 5.3, Z = 2; beta = 105° V = 912.28 Den(Calc)= 3.25 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
| Physical Properties of Aluminoferrobarroisite Density: |
2.94 |
| Optical Properties of Aluminoferrobarroisite Optical Data: |
NCalc= 1.67 - from Gladstone-Dale relationship (KC = 0.2052) where Ncalc=Dcalc*KC+1 |
NCalc= 1.6 - from Gladstone-Dale relationship (KC = 0.2052) where Ncalc=Dmeas*KC+1 | Calculated Properties of Aluminoferrobarroisite Electron Density: |
Bulk Density (Electron Density)=3.20 gm/cc |
note: Specific Gravity of Aluminoferrobarroisite =3.25 gm/cc. Fermion Index: |
Fermion Index = 0.01 |
Boson Index = 0.99 Photoelectric: |
PEAluminoferrobarroisite = 7.25 barns/electron |
U=PEAluminoferrobarroisite x rElectron Density= 23.19 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Aluminoferrobarroisite is Not Radioactive | Aluminoferrobarroisite Classification Dana Class: |
66.01.03b.06a (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.01)with P=2 amphibole configuration |
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(66.01.03b)Group 3, the sodic-calcic amphiboles |
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Strunz Class: |
09.DE.20 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family |
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| Other Aluminoferrobarroisite Information References: |
PHYS. PROP.(Min.Mag.,Vol.61,p305,1997) |
See Also: |
Links to other databases for Aluminoferrobarroisite : |
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 Search for Aluminoferrobarroisite using: Visit our Advertisers for Aluminoferrobarroisite : A Bijoux Google Search for AluminoferrobarroisiteAdam's Minerals Google Search for Aluminoferrobarroisite Cape Minerals Google Search for Aluminoferrobarroisite Dakota Matrix Minerals Google Search for Aluminoferrobarroisite Excalibur Mineral Corp. Google Search for Aluminoferrobarroisite Exceptional Minerals Google Search for Aluminoferrobarroisite John Betts Fine Minerals Search for Aluminoferrobarroisite McDougall Minerals Google Search for Aluminoferrobarroisite Mineral News Website Link Rock and Mineral Shows Google Search for Aluminoferrobarroisite Weinrich Minerals, Inc. Google Search for Aluminoferrobarroisite Ask about Aluminoferrobarroisite here : Print or Cut-and-Paste your Aluminoferrobarroisite Specimen Label here :
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