Abstract
The thermal behaviours of magnesium sulfite, strontium sulfite and barium sulfite were investigated in the atmospheres of argon and air. the thermal behaviours of magnesium sulfite were different from those of the other two sulfites. The oxidation of magnesium sulfite in air does not occur. The bonding state of the SO 3 2− in each sulfite was compared. The SO 3 2− in magnesium sulfite was coordinated through the sulfur, while those in the other sulfites were coordinated through the oxygen. It appears that the difference in thermal behaviour between magnesium sulfite and the other sulfites depend upon the difference in bonding state of the SO 3 2−
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