Mineralogy Database

Prehnite Mineral Data

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General Prehnite Information

Help on Chemical  Formula: Chemical Formula: Ca2Al2Si3O10(OH)2
Help on Composition: Composition: Molecular Weight = 395.38 gm
   Calcium   20.27 %  Ca   28.37 % CaO
   Aluminum  13.65 %  Al   25.79 % Al2O3
   Silicon   21.31 %  Si   45.59 % SiO2
   Hydrogen   0.25 %  H     2.28 % H2O
   Oxygen    44.51 %  O
            ______        ______ 
            100.00 %      102.02 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Al2Si3O10(OH)
Help on Environment: Environment: Hydrothermally altered rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1789
Help on Locality: Locality: Haslach, Harzburg and Oberstein, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Dutch Colonel, H. Von Prehn (1733-1785).
Help on Name Pronunciation: Name Pronunciation: Prehnite Say PREHNITE
Help on Synonym: Synonym: ICSD 69402
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