Periclase is a magnesium mineral that occurs naturally in contact metamorphic rocks and is a major component of most basic refractory bricks. ... Periclase is usually found in marble produced by metamorphism of dolomitic limestones. It readily alters to brucite under near surface conditions.
What is periclase used for?
Periclase derived from heating of dolomite is useful as a refractory material, for instance as a lining to blast furnaces. The color of periclase varies from white to yellow, or brown when iron is present.
How is brucite formed?
Brucite (Mg(OH)2) has an hexagonal structure (space group Pm1). It is often formed from the alteration of periclase (MgO) in Mg-bearing limestones and dolomites. These occurrences can be due to low-temperature hydrothermal alteration or metamorphism of limestones and schists and during the serpentinization of dunite.
