Itoigawaite Mineral Data

General Itoigawaite Information
Chemical Formula:	SrAl2Si2O7(OH)2•(H2O)
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
Empirical Formula:	SrAl₂Si₂O₇(OH)₂•(H₂O)
Environment:	As a veinlet in jadeitite boulders. A member of the lawsonite group
IMA Status:	Approved IMA 1998 (Dana # Added)
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.
Name Origin:	Named for the locality.
Synonym:	IMA1998-034