By means of the thermogravimetric (TG) method, and differential thermal analysis (DTA) with simultaneous chemical
analysis of the gaseous reaction products, X-ray diffraction phase analysis, and infrared spectroscopy, stages of decomposition
of Al(NO3)39H2O were studied. It has been found that the thermal decomposition of Al(NO3)39H2O proceeds in a few
stages. First stage is connected with partial dehydration of the compound without decomposition of the nitrate groups. The
successive stages comprise the hydrolytic processes, which are connected with further dehydration and loss of the nitrate
groups. The process proceeds with the formation of amorphous alumina. # 2002 Elsevier Science B.V. All rights reserved