Feldspar mineral, calcium aluminosilicate (CaAl2Si2O8), that occurs as white or grayish, brittle, glassy crystals. Primarily a rock-forming mineral, it is used in the manufacture of glass and ceramics. Anorthite occurs in basic igneous rocks (see acid and basic rocks).
Learn more about anorthite with a free trial on Britannica.com.
It also makes up much of the lunar highlands. Anorthite was discovered in samples from comet Wild 2, and the mineral is an important constituent of Ca-Al-rich inclusions in rare varieties of chondritic meteorites.
WIPO ASSIGNS PATENT TO PROMAT FOR "COMPOSITION FOR A LIGHT-WEIGHT REFRACTORY BRICK HAVING A HIGH ANORTHITE PERCENTAGE" (GERMAN, CHINESE INVENTORS)
Jun 10, 2011; GENEVA, June 10 -- Publication No. WO/2011/066842 was published on June 09. Title of the invention: "COMPOSITION FOR A...