Mineralogy Database

Pyrophyllite Mineral Data

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General Pyrophyllite Information

Help on Chemical  Formula: Chemical Formula: Al2Si4O10(OH)2
Help on Composition: Composition: Molecular Weight = 360.31 gm
   Aluminum  14.98 %  Al   28.30 % Al2O3
   Silicon   31.18 %  Si   66.70 % SiO2
   Hydrogen   0.56 %  H     5.00 % H2O
   Oxygen    53.28 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al2Si4O10(OH)2
Help on Environment: Environment: Somewhat uncommon, found both in hydrothermal veins and in bedded deposits in schistose metamorphic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1829
Help on Locality: Locality: Tres Cerritos, California, USA; Pyschminsk and Beresovsk, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for fie and leaf, in allusion to its tendency to exfoliate into fan shapes when heated.
Help on Name Pronunciation: Name Pronunciation: Pyrophyllite + Pronunciation Say PYROPHYLLITE