Mineralogy Database

Itoigawaite Mineral Data

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General Itoigawaite Information

Help on Chemical  Formula: Chemical Formula: SrAl2Si2O7(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 361.78 gm
   Strontium  24.22 %  Sr   28.64 % SrO
   Aluminum   14.92 %  Al   28.18 % Al2O3
   Silicon    15.53 %  Si   33.22 % SiO2
   Hydrogen    1.11 %  H     9.96 % H2O
   Oxygen     44.22 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: SrAl2Si2O7(OH)2•(H2O)
Help on Environment: Environment: As a veinlet in jadeitite boulders. A member of the lawsonite group
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: On the seashore of Oyashirazu, about 15 km WSW of Itoigawa Station, Itoigawa-Ohmi district, Niigata-ken Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA1998-034