12-05726. Magnesium Selenite [Archived]

Nomenclature

CAS number: 15593-61-0
MgO3Se; mol wt 151.26.
Mg 16.07%, O 31.73%, Se 52.20%.
MgSeO3.

Description and references

Hexahydrate prepd by adding sodium selenite to a soln of magnesium chloride: Nilson, cited in Mellor's 10, 826 (1930); by treating a soln of magnesium chloride or sulfate with selenious acid and adding sodium carbonate to start precipitation: Boutzoureano, Recherches sur les Sélénites (Paris, 1889).

Properties

Orthorhombic crystals. Insol in water; sol in dil acids. Forms monoclinic prisms of the dihydrate when heated in a sealed tube to 150°. When heated to 100°, it loses 5 mols of water leaving the monohydrate.

Status

This monograph has been retired and is no longer subject to revision or update.