Mineralogy Database

Magnesiocummingtonite Mineral Data

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General Magnesiocummingtonite Information

Help on Chemical Formula: Chemical Formula: (Mg,Fe++)7Si8O22(OH)2
Help on Composition: Composition: Molecular Weight = 836.02 gm
   Magnesium  15.26 %  Mg   25.31 % MgO
   Iron       11.69 %  Fe   15.04 % FeO
   Silicon    26.88 %  Si   57.50 % SiO2
   Hydrogen    0.24 %  H     2.15 % H2O
   Oxygen     45.93 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg5.25Fe2+1.75Si8O22(OH)2
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as per current IMA amphibole nomenclature (Burke and Leake 2004; Can. Mineral., 42, 1881-1883). Dashkensanite (1936) was revalidated and renamed 2005.
Help on Synonym: Synonym: ICSD 41925
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