| Santabarbaraite Mineral Data |
- 42.10.1.1 Ferrisymplesite Fe3(AsO4)2(OH)3·5(H2O) None
- 42.10.1.2 Santabarbaraite ! Fe3(PO4)2(OH)3·5(H2O) None
- VII/D.48-10 Gutsevichite? Al3(PO4)2(OH)3·8(H2O) Unk Cubic
- VII/D.48-15 Santabarbaraite Fe3(PO4)2(OH)3·5(H2O) None
- VII/D.48-20 Ferrisymplesite Fe3(AsO4)2(OH)3·5(H2O) None
- VII/D.48-40 Yukonite Ca7Fe11(AsO4)9O10·24.3(H2O) None
General Santabarbaraite Information |
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 Chemical Formula: |
Fe+++3(PO4)2(OH)3·5(H2O) | ||
| Composition: |
Molecular Weight = 493.39 gm | ||
| Magnesium 0.34 % Mg 0.57 % MgO | |||
| Manganese 1.56 % Mn 2.24 % Mn2O3 | |||
| Iron 30.67 % Fe 43.86 % Fe2O3 | |||
| Phosphorus 12.87 % P 29.49 % P2O5 | |||
| Hydrogen 2.67 % H 23.84 % H2O | |||
| Oxygen 51.88 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Fe3+2.71Mn3+0.14Mg0.07(PO4)2.05(OH)2.54·5.26(H2O) | ||
| Environment: |
Found in cavities in concretions. Altered from vivianite in a clastic sequence. | ||
| IMA Status: |
Approved IMA 2003 (Dana # Added) | ||
| Locality: |
Valdarno, Tuscany, Italy. Link to MinDat.org Location Data. | ||
| Name Origin: |
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. | ||
| Synonym: |
IMA2000-052 | ||
Santabarbaraite Image | |||
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Images:
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Santabarbaraite Crystallography |
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| Crystal System: |
Amorphous- No Crystals | ||
Physical Properties of Santabarbaraite |
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| Cleavage: |
[010] Parting | ||
| Color: |
Light brown, Brown. | ||
| Density: |
2.42 | ||
| Diaphaniety: |
Translucent | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Habit: |
Pseudomorphous - Occurs in the form of another mineral. | ||
| Luster: |
Vitreous - Greasy | ||
| Streak: |
amber | ||
Optical Properties of Santabarbaraite |
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| Gladstone-Dale: |
CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC) KPDmeas= 0.2872,KC= 0.2811 |
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| Optical Data: |
Isotropic, n=1.695. | ||
Calculated Properties of Santabarbaraite |
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| Electron Density: |
relectron=2.42 gm/cc |
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| Fermion Index |
Fermion Index = 0.0071 Boson Index = 0.9929 |
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| Photoelectric: |
PESantabarbaraite = 10.02 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Santabarbaraite is Not Radioactive |
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Santabarbaraite Classification |
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| Dana Class: |
42.10.1.2 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | ||
| (42.10)where (AB)3 (XO4)2 Zq · x(H2O) | |||
| (42.10.1)Dana Group | |||
| Strunz Class: |
VII/D.48-15 VII - Phosphates, Arsenates and Vanadates | ||
| VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K | |||
| VII/D.48 - Gutsevichite - Yukonite series | |||
Other Santabarbaraite Information |
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| References: |
NAME( AmMin, v 88, p 1838) PHYS. PROP.(AmMin, v 88, p 1838) OPTIC PROP.(AmMin, v 88, p 1838) | ||
| See Also: |
Links to other databases for Santabarbaraite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas Search for Santabarbaraite using: Visit our Advertisers for Santabarbaraite : Translate Santabarbaraite Mineral Data : Ask about Santabarbaraite here : Print or Cut-and-Paste your Santabarbaraite Specimen Label here :
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