The Collaborative International Dictionary
Brucite \Bru"cite\, n. [Named after Dr. A. Bruce of New York.] (Min.)
A white, pearly mineral, occurring thin and foliated, like talc, and also fibrous; a native magnesium hydrate.
The mineral chondrodite. [R.]
Wiktionary
n. (context mineral English) A mineral form of magnesium hydroxide, magnesium(oxygenhydrogen)2.
Wikipedia
Brucite is the mineral form of magnesium hydroxide, with the chemical formula Mg( OH). It is a common alteration product of periclase in marble; a low-temperature hydrothermal vein mineral in metamorphosed limestones and chlorite schists; and formed during serpentinization of dunites. Brucite is often found in association with serpentine, calcite, aragonite, dolomite, magnesite, hydromagnesite, artinite, talc and chrysotile.
Notable locations include Wood's Chrome Mine, Cedar Hill Quarry, Lancaster County, Pennsylvania, US.
Usage examples of "brucite".
Brucite is usually found as platy masses, sometimes of considerable size, which have a perfect cleavage parallel to the surface of the plates.