Mineralogy Database

Guimaraesite Mineral Data

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General Guimaraesite Information

Help on Chemical Formula: Chemical Formula: Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O
Help on Composition: Composition: Molecular Weight = 1,107.66 gm
   Calcium      7.24 %  Ca   10.13 % CaO
   Magnesium    3.84 %  Mg    6.37 % MgO
   Beryllium    3.25 %  Be    9.03 % BeO
   Zinc        13.28 %  Zn   16.53 % ZnO
   Iron         5.04 %  Fe    6.49 % FeO
   Phosphorus  16.78 %  P    38.44 % P2O5
   Hydrogen     1.46 %  H    13.01 % H2O
   Oxygen      49.11 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Zn2.25Mg1.75Fe2+Be4(PO4)6(OH)4•6(H2O)
Help on Environment: Environment: Roscherite group. Zinc analog of zanazziite.
Help on IMA Status: IMA Status: Proposed IMA 2006
Help on Locality: Locality: Granite pegmatite near the Piau� river, Itinga county, Minas Gerais, Brazil Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2006-028