Temperature Dependence of Magnetic Susceptibilities of KClO₃, KBrO₃, and KIO₃

Abstract

Magnetic susceptibilities of crushed samples of KClO₃, KBrO₃ and KIO₃ were measured with a recording magnetic balance which was operated by the Faraday method. The temperature was elevated at a constant rate, 250°C per hour. It was found that, being heated, KClO₃ showed irregular paramagnetic susceptibilities in the solid or liquid state, before the evolution of oxygen gas at 500°C. A possible explanation for the irregular paramagnetic behaviors is suggested.
On the contrary, KBrO₃ and KIO₃ showed the diamagnetic susceptibilities, which were independent of temperature below the temperatures of the evolution of oxygen gas, 370° and 550°C, respectively.