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periclase


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Magnesium oxide (MgO), a member of the oxide group of minerals; sp. gr. 3.5; hardness 5.5; white, yellow, or green; crystalline or granular; occurs in contact-metamorphosed (see thermal metamorphism) limestones and may be altered to brucite (Mg(OH)2) by hydration.

Subjects: Earth Sciences and Geography.


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