Walthierite Mineral Data

General Walthierite Information
Chemical Formula:	Ba0.5Al3(SO4)2(OH)6
Composition:	Molecular Weight = 443.78 gm
	Barium 15.47 % Ba 17.28 % BaO
	Aluminum 18.24 % Al 34.46 % Al₂O₃
	Hydrogen 1.36 % H 12.18 % H₂O
	Sulfur 14.45 % S 36.08 % SO₃
	Oxygen 50.47 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Ba_0.5Al₃(SO₄)₂(OH)₆
Environment:	Open-space filling of a fault, formed by reaction of hydrothermal fluids with barite.
IMA Status:	Approved IMA 1992
Locality:	Reina vein, about seven km southeast of the El Indio mine, El Indio-Tambo district, east of La Serena, Coquimbo, Chile. Link to MinDat.org Location Data.
Name Origin:	Named for Thomas Nash Walthier (1923-1990), American economic geologist, St. Joseph Minerals Co., who worked in the Tambo district, Chile.
Name Pronunciation:	Walthierite + Pronunciation
Synonym:	IMA1991-008