Mineralogy Database

Metavivianite Mineral Data

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General Metavivianite Information

Help on Chemical  Formula: Chemical Formula: (Fe++3-x,Fe+++x)(PO4)2(OH)x•8-x(H2O), x=0.5
Help on Composition: Composition: Molecular Weight = 501.10 gm
   Iron        33.43 %  Fe   35.84 % FeO /  7.97 % Fe2O3
   Phosphorus  12.36 %  P    28.33 % P2O5
   Hydrogen     3.12 %  H    27.86 % H2O
   Oxygen      51.09 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+2.5Fe3+0.5(PO4)2(OH)0.5•7.5(H2O)
Help on Environment: Environment: Oxidized and dehydrated compared to vivianite.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Big Chief pegmatite, Glendale, Pennington County, South Dakota, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named to reflect the relationship with vivianite.
Help on Name Pronunciation: Name Pronunciation: Metavivianite + Pronunciation Say METAVIVIANITE
Help on Synonym: Synonym: Egueiite - a hydrous Ca-Fe phosphate, possibly altered metavivianite
  ICSD 201137
  Kertschenite
  Oxykertschenite
  PDF 26-1137