The Formation of Trapped Electrons upon the Thermal Dehydrationcondensation of Hydrated Hydrogenorthophosphates

Abstract

Radical formation was found in the thermal dehydration-condensation process of hydrated hydrogenorthophosphates (HHP). It was considered that the intermediate radical reacted with lattice defects, thus resulting in the generation of trapped electrons. The gray coloration and the ESR sensitivity of the heated HHP were assigned to the formation of the trapped electron.