Abstract
The crystalline cerium bis-monohydrogen phosphate Ce(HPO4)2·1.33 H2O was synthetized and identified by X-ray and analytical methods.The thermal decomposition was investigated by simultaneous TG, DTG and DTA measurements. As a result of investigations four endothermic processes with weight loss were found; the first two, nearly equal peaks at 373 and 423 K, the third at 653 K and the last at 1053 K. The material after heating over 1273 K was investigated with the same analytical methods. In connection with these data we supposed that the weight losses may be identified as water and oxigen losses. The thermal analysis was supported by X-ray measurements. Collecting the results of thermal and X-ray analysis crystalline water bound in the molecule in various ways can be quantitatively distinguished. It was found that this phenomena have definite influence on the layer distance.By the X-ray measurements the change of the crystal structure taking place during the heating process could be followed.
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