BREWSTERITE-BA


Meaning of BREWSTERITE-BA in English

General Information:

Chemical Formula:

(Ba,Sr)Al2Si6O16·5(H2O)

Composition:

(Molecular Weight = 693.44 gm)

Barium 14.85 % Ba

Strontium 3.16 % Sr

Aluminum 7.78 % Al

Silicon 24.30 % Si

Hydrogen 1.45 % H

Oxygen 48.45 % O

Empirical Formula:

Ba0.75Sr0.25Al2Si6O16·5(H2O)

Environment:

Secondary mineral in metamorphosed calc-silicates.

IMA Status:

Approved IMA (Dana # Added)

Locality:

Discovered at the No. 4 wollastonite mine of the Gouverneur Talc Co., near Harrisville, Lewis County, New York, U.S.A.

Name Origin:

Named after David Brewster (1781-1868), Scottish physicist, who studied the optical properties of minerals and the element Strontium. The Ba-dominant member of the brewsterite serie s.

Physical Properties:

Color:

white or colorless.

Density:

2.453

Diaphaniety:

Transparent

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .