Mineralogy Database

Monteregianite-(Y) Mineral Data

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General Monteregianite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Na,K)6(Y,Ca)2Si16O38•10(H2O)
Help on Composition: Composition: Molecular Weight = 1,574.86 gm
   Potassium   4.47 %  K     5.38 % K2O
   Sodium      6.86 %  Na    9.25 % Na2O
   Calcium     0.51 %  Ca    0.71 % CaO
   Yttrium     9.60 %  Y    12.19 % Y2O3
   Aluminum    0.34 %  Al    0.65 % Al2O3
   Silicon    28.18 %  Si   60.28 % SiO2
   Hydrogen    1.28 %  H    11.44 % H2O
   Oxygen     48.76 %  O
             ______        ______ 
             100.00 %       99.90 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K1.8Na4.7Y1.7Ca0.2Si15.8Al0.2O38•10(H2O)
Help on Environment: Environment: In miarolitic cavities, metamorphosed inclusions in nepheline syenite.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Monteregian Hills, a series of intrusions.
Help on Name Pronunciation: Name Pronunciation: Monteregianite-(Y) + Pronunciation Say MONTEREGIANITE-(Y)
Help on Synonym: Synonym: ICSD 202257
  IMA1972-026
  PDF 31-1087