General Ferri-ferrobarroisite Information Chemical Formula: |
[ ]CaNa(Fe++)3(Fe+++)2(Si7Al)O22(OH)2 |
Composition: |
Molecular Weight = 951.88 gm |
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Sodium 2.42 % Na 3.26 % Na2O |
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Calcium 4.21 % Ca 5.89 % CaO |
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Aluminum 2.83 % Al 5.36 % Al2O3 |
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Iron 29.33 % Fe 22.64 % FeO / 16.78 % Fe2O3 |
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Silicon 20.65 % Si 44.19 % SiO2 |
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Hydrogen 0.21 % H 1.89 % H2O |
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Oxygen 40.34 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
CaNaFe2+3Fe3+2(Si7AlO22)(OH)2 |
IMA Status: |
Proposed 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 Ferri-ferrobarroisite Images
Images:
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| | Ferri-ferrobarroisite Crystallography Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
| Physical Properties of Ferri-ferrobarroisite Density: |
3.5 |
| Optical Properties of Ferri-ferrobarroisite Optical Data: |
NCalc= 1.78 - from Gladstone-Dale relationship (KC = 0.2234) where Ncalc=Dmeas*KC+1 |
| Calculated Properties of Ferri-ferrobarroisite Electron Density: |
Bulk Density (Electron Density)=3.43 gm/cc |
note: Specific Gravity of Ferri-ferrobarroisite =3.50 gm/cc. Fermion Index: |
Fermion Index = 0.01 |
Boson Index = 0.99 Photoelectric: |
PEFerri-ferrobarroisite = 10.17 barns/electron |
U=PEFerri-ferrobarroisite x rElectron Density= 34.84 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Ferri-ferrobarroisite is Not Radioactive | Ferri-ferrobarroisite Classification Dana Class: |
66.01.03b.08a (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 Ferri-ferrobarroisite Information References: |
PHYS. PROP.(Min.Mag.,Vol.61,p305,1997) |
See Also: |
Links to other databases for Ferri-ferrobarroisite : |
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 Ferri-ferrobarroisite using: Visit our Advertisers for Ferri-ferrobarroisite : A Bijoux Google Search for Ferri-ferrobarroisiteAdam's Minerals Google Search for Ferri-ferrobarroisite Cape Minerals Google Search for Ferri-ferrobarroisite Dakota Matrix Minerals Google Search for Ferri-ferrobarroisite Excalibur Mineral Corp. Google Search for Ferri-ferrobarroisite Exceptional Minerals Google Search for Ferri-ferrobarroisite John Betts Fine Minerals Search for Ferri-ferrobarroisite McDougall Minerals Google Search for Ferri-ferrobarroisite Mineral News Website Link Rock and Mineral Shows Google Search for Ferri-ferrobarroisite Weinrich Minerals, Inc. Google Search for Ferri-ferrobarroisite Ask about Ferri-ferrobarroisite here : Print or Cut-and-Paste your Ferri-ferrobarroisite Specimen Label here :
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