Mineralogy Database

Laumontite Mineral Data

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General Laumontite Information

Help on Chemical  Formula: Chemical Formula: CaAl2Si4O12•4(H2O)
Help on Composition: Composition: Molecular Weight = 470.44 gm
   Calcium    8.52 %  Ca   11.92 % CaO
   Aluminum  11.47 %  Al   21.67 % Al2O3
   Silicon   23.88 %  Si   51.09 % SiO2
   Hydrogen   1.71 %  H    15.32 % H2O
   Oxygen    54.42 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2Si4O12•4(H2O)
Help on Environment: Environment: Secondary mineral in basalts and andesites. Also occurs in metamorphic rocks and granites. Found in copper veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1801
Help on Locality: Locality: Nagy-Ag, Transylvania of Romania. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Frenchman, F. P. N. de Laumont (1747-1834).
Help on Name Pronunciation: Name Pronunciation: Laumontite + Pronunciation Say LAUMONTITE
Help on Synonym: Synonym: Aedelforsite
  Caporcianite
  ICSD 72914
  Leonhardite
  Lomonite
  PDF 45-1325