Brucite is a mineral form of magnesium
hydroxide (Mg3(OH)6), derived from periclase. The
crystals are either glassy or waxy, can be white, pale green, gray, or blue,
and occur in fibrous masses or plate aggregates. Brucite is found in serpentine,
schists, and other metamorphic
rocks. It is used to make magnesia refractory materials.
AND PLANETARY SCIENCE