Mineralogy Database

Epistilbite Mineral Data

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General Epistilbite Information

Help on Chemical  Formula: Chemical Formula: CaAl2Si6O16•5(H2O)
Help on Composition: Composition: Molecular Weight = 608.62 gm
   Calcium    6.59 %  Ca    9.21 % CaO
   Aluminum   8.87 %  Al   16.75 % Al2O3
   Silicon   27.69 %  Si   59.23 % SiO2
   Hydrogen   1.66 %  H    14.80 % H2O
   Oxygen    55.20 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2Si6O16•5(H2O)
Help on Environment: Environment: Alteration product in basalts.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1826
Help on Locality: Locality: Berufjord, Iceland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek epi - "near" and the mineral Stilbite.
Help on Name Pronunciation: Name Pronunciation: Epistilbite + Pronunciation Say EPISTILBITE
Help on Synonym: Synonym: ICSD 82770
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