Periclase
From Wikipedia, the free encyclopedia
Periclase occurs naturally in contact metamorphic rocks and is a major component of most basic refractory bricks. It is a cubic form of magnesium oxide (MgO).
The old term for the mineral is magnesia. Stones from the Magnesia region in ancient Anatolia contained both magnesium oxide and hydrated magnesium carbonate as well as iron oxides (such as magnetite). Thus these stones, called Stones from Magnesia in antiquity, with their unusual magnetic properties were the reason the terms magnet and magnetism were coined.
 |
This article about a specific mineral, mineraloid, or rock type is a stub. You can help Wikipedia by expanding it. |
Dead burned sea water magnesia is specifically used in cupels in the assay process for gold bearing ores, where it absorbs other minerals in the presence of lead and permits calculation of the gold content in gold bearing ores
