Magnesium, its alloys and compounds - USGS
2001-10-4 · also called refractory or sintered magnesia, is calcined at temperatures up to 1,450 E C and is unreactive with water. Fused magnesia is produced at temperatures greater than 3,000E C. Magnesia produced from magnesite is generally called natural magnesia, and magnesia produced from seawater or brines is called synthetic magnesia.
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