Mineralogy Database

Santabarbaraite Mineral Data

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General Santabarbaraite Information

Help on Chemical Formula: Chemical Formula: Fe+++3(PO4)2(OH)3•5(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Fe3+2.71Mn3+0.14Mg0.07(PO4)2.05(OH)2.54•5.26(H2O)
Help on Environment: Environment: Found in cavities in concretions. Altered from vivianite in a clastic sequence.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Valdarno, Tuscany, Italy. Link to MinDat.org Location Data.
Help on Name Origin: 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.
Help on Synonym: Synonym: Azovskite - massive non-crystalline hydrous Fe-phosphate mixed with goethite
  IMA2000-052