Synthesis and thermal behaviour of alkaline earth cyclo-octaphosphates


    loading  Checking for direct PDF access through Ovid

Abstract

Hydrated alkaline earth cyclo-octaphosphates were made by adding an aqueous solution of alkaline earth chlorides into an aqueous solution of sodium cyclo-octaphosphate. Thermal properties of the compounds were studied by TG-DTA analysis. The water of crystallization was removed below 200°C. The cyclo-octaphosphates decomposed to produce many phosphate species up to about 500°C, and they finally reorganized to metaphosphates. The overall thermal reaction of alkaline earth cyclo-octaphosphates can be written by the equation. M4(PO3)8·nH2O → 4M(PO3)2 + nH2O (M:alkaline earth metal)

    loading  Loading Related Articles