Mineralogy Database

Stilbite-Ca Mineral Data

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General Stilbite-Ca Information

Help on Chemical  Formula: Chemical Formula: NaCa4[Al8Si28O72]•n(H2O) (n=28-32)
Help on Composition: Composition: Molecular Weight = 2,877.96 gm
   Sodium     0.80 %  Na    1.08 % Na2O
   Calcium    5.57 %  Ca    7.79 % CaO
   Aluminum   7.50 %  Al   14.17 % Al2O3
   Silicon   27.32 %  Si   58.46 % SiO2
   Hydrogen   2.10 %  H    18.78 % H2O
   Oxygen    56.70 %  O
            ______        ______ 
            100.00 %      100.28 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa4Al8Si28O72•30(H2O)
Help on Environment: Environment: Amygdaloidal cavities in basalts and similar rocks. Redefined from stilbite by IMA zeolite committee.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1801
Help on Locality: Locality: Ha´┐Ży mentioned occurrences in Iceland, Andreasberg in Harz, Alpes Dauphinoises and Norway, but no clear type-locality. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek stilbe - "luster" in allusion to the pearly to vitreous luster. Ca modifier added by zeolite committee.
Help on Name Pronunciation: Name Pronunciation: Stilbite-Ca Say STILBITE-CA
Help on Synonym: Synonym: Aedelforsite
  Bundle zeolite
  Desmine
  Stilbite