Preparacao, caracterizacao e estudo do comportamento termico dos sele-natos duplos de calcio, berilio e amonio

Abstract

The preparation and thermal decomposition ammonium selenate and calcium and beryllium selenates have been reported previously. However, there are not any information in the literature concerning the thermal decomposition of double selenates of calcium, of beryllium and ammonium. Thermogravimetry (TG), Differential Thermal Analysis (DTA) were used in the studies and characterisation of these compounds.