Mineralogy Database

Macfallite Mineral Data

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General Macfallite Information

Help on Chemical Formula: Chemical Formula: Ca2(Mn+++,Al)3(SiO4)(Si2O7)(OH)3
Help on Composition: Composition: Molecular Weight = 544.17 gm
   Sodium      0.04 %  Na    0.06 % Na2O
   Calcium    14.95 %  Ca   20.92 % CaO
   Magnesium   0.40 %  Mg    0.67 % MgO
   Manganese  25.34 %  Mn   36.41 % Mn2O3
   Aluminum    1.34 %  Al    2.53 % Al2O3
   Vanadium    0.09 %  V     0.14 % V2O3
   Copper      0.35 %  Cu    0.44 % CuO
   Silicon    15.74 %  Si   33.68 % SiO2
   Hydrogen    0.58 %  H     5.16 % H2O
   Oxygen     41.16 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2.03Na0.01Mn3+2.51Al0.27Mg0.09Cu0.03V3+0.01Si3.05O10.88(OH)3.12
Help on Environment: Environment: Associated with other Mn-silicates.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Manganese Lake, Copper Harbor, Keweenaw County, Michigan, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Russell P. MacFall, a dedicated amateur mineralogist.
Help on Name Pronunciation: Name Pronunciation: Macfallite + Pronunciation Say MACFALLITE
Help on Synonym: Synonym: ICSD 1612
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