Mineralogy Database

Pumpellyite-(Mg) Mineral Data

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General Pumpellyite-(Mg) Information

Help on Chemical  Formula: Chemical Formula: Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 470.70 gm
   Calcium    17.03 %  Ca   23.83 % CaO
   Magnesium   5.16 %  Mg    8.56 % MgO
   Aluminum   11.46 %  Al   21.66 % Al2O3
   Silicon    17.90 %  Si   38.29 % SiO2
   Hydrogen    0.86 %  H     7.65 % H2O
   Oxygen     47.59 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O)
Help on Environment: Environment: Meta-basalt or gabbroic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1925
Help on Locality: Locality: Calumet mine, Houghton County, Keweenaw Peninisula, Michigan, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the American geologist, R. Pumpelly (1837-1923).
Help on Name Pronunciation: Name Pronunciation: Pumpellyite-(Mg) + Pronunciation Say PUMPELLYITE-(MG)
Help on Synonym: Synonym: Pumpellyite