Chemical Formula: Ca2Al2Si3O10(OH)2
Help on Composition: Composition: Molecular Weight = 395.38 g
 
Hydrogen 0.25 % H 2.28 % H2O 0.00 %
Oxygen 44.51 % O 0.00 % 0.00 %
Aluminum 13.65 % Al 25.79 % Al2O3 0.00 %
Silicon 21.31 % Si 45.59 % SiO2 0.00 %
Calcium 20.27 % Ca 28.37 % CaO 0.00 %


99.99 % 102.03 %
 
Help on Empirical Formula: Empirical Formula: Ca2Al2Si3O10(OH)
Help on Environment: Environment: Hydrothermally altered rocks
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 Synonym: Synonym: