General Santabarbaraite InformationFe+++3(PO4)2(OH)3•5(H2O) |
Molecular Weight = 493.39 gm |
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Magnesium 0.34 % Mg 0.57 % MgO |
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Manganese 1.56 % Mn 2.24 % Mn2O3 |
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Iron 30.67 % Fe 43.86 % Fe2O3 |
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Phosphorus 12.87 % P 29.49 % P2O5 |
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Hydrogen 2.67 % H 23.84 % H2O |
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Oxygen 51.88 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Fe3+2.71Mn3+0.14Mg0.07(PO4)2.05(OH)2.54•5.26(H2O) |
Found in cavities in concretions. Altered from vivianite in a clastic sequence. |
Approved IMA 2003 (Dana # Added) |
Valdarno, Tuscany, Italy. Link to MinDat.org Location Data. |
Named for Saint Barbara (4th century), a martyred christian who took refuge in the mines and converted many of the miners, hence her patronage to miners. |
Azovskite - massive non-crystalline hydrous Fe-phosphate mixed with goethite |
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IMA2000-052 |
| | Santabarbaraite Image
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Santabarbaraite Crystallography Amorphous- No Crystals |
| Physical Properties of Santabarbaraite{010} Parting |
Light brown, Brown. |
2.42 |
Translucent |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Aggregates - Made of numerous individual crystals or clusters. |
Pseudomorphous - Occurs in the form of another mineral. |
Vitreous - Greasy |
amber |
| Optical Properties of SantabarbaraiteCI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC) |
KPDmeas= 0.2872,KC= 0.2811 Ncalc = 1.68 Isotropic, n=1.695. |
| Calculated Properties of SantabarbaraiteBulk Density (Electron Density)=2.42 gm/cc |
note: Specific Gravity of Santabarbaraite =2.42 gm/cc. Fermion Index = 0.007100911 |
Boson Index = 0.992899089 PESantabarbaraite = 10.02 barns/electron |
U=PESantabarbaraite x rElectron Density= 24.24 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Santabarbaraite is Not Radioactive | Santabarbaraite Classification42.10.01.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen |
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(42.10)where (AB)3 (XO4)2 Zq · x(H2O) |
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(42.10.01)Ferrisymplesite Group |
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08.CE.80 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.C - Phosphates without Additional Anions, with H2O |
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08.CE -With only medium-sized cations, RO4:H2O £ 1:2.5 |
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| Other Santabarbaraite InformationNAME( AmMin, v 88, p 1838) PHYS. PROP.(AmMin, v 88, p 1838) OPTIC PROP.(AmMin, v 88, p 1838) |
Links to other databases for Santabarbaraite : |
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 Santabarbaraite using: Visit our Advertisers for Santabarbaraite : B and L Fine MineralsDakota Matrix Minerals Dan & Diana Weinrich Mineral Auctions Excalibur Mineral Corp. Exceptional Minerals John Betts Fine Minerals Mineral News Mineral of the Month Club NY/NJ Gem & Mineral Show TIMA Mineral Analyzer Weinrich Minerals, Inc. Wright's Rock Shop Ask about Santabarbaraite here : Print or Cut-and-Paste your Santabarbaraite Specimen Label here :
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