Brewsterite-Ba Mineral Data

General Brewsterite-Ba Information
Chemical Formula:	(Ba,Sr)Al2Si6O16•5(H2O)
Composition:	Molecular Weight = 693.44 gm
	Barium 14.85 % Ba 16.58 % BaO
	Strontium 3.16 % Sr 3.74 % SrO
	Aluminum 7.78 % Al 14.70 % Al₂O₃
	Silicon 24.30 % Si 51.99 % SiO₂
	Hydrogen 1.45 % H 12.99 % H₂O
	Oxygen 48.45 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Ba_0.75Sr_0.25Al₂Si₆O₁₆•5(H₂O)
Environment:	Secondary mineral in metamorphosed calc-silicates. The Ba-dominant member of the brewsterite series.
IMA Status:	Approved IMA 1998 (Dana # Added)
Locality:	Discovered at the No. 4 wollastonite mine of the Gouverneur Talc Co., near Harrisville, Lewis County, New York, U.S.A. Link to MinDat.org Location Data.
Name Origin:	Named as the barium analogue of brewterite-Sr (formerly bariumbrewsterite).
Name Pronunciation:	Brewsterite-Ba + Pronunciation
Synonym:	Bariumbrewsterite