K. Isa, H. Ishimura
Dec 1, 1981
Citations
0
Influential Citations
8
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
Ammonium heptamolybdate(6–) tetrahydrate (AHM) was studied by means of high temperature oscillating X-ray diffraction with a large capacity generator of 12 kW. Experimental conditions were determined precisely. It was possible to settle the maximum value of diffracted patterns, and the inherited error was about 1.5%. Thermal decomposition of AHM was studied by means of TG-DTA, but the first decrease of TG could not be explained as a single process of decomposition. Moreover it could also not be explained by means of high-temperature oscillating X-ray diffraction with a standard generator. However, with a large capacity generator, the first decrease of TG could be explained to be a convolution of three steps of decomposition. Moreover, the second and third steps could be explained by observing the microscopic structural change. In a high-temperature oscillating XRD, (heating rate 2 °C/min), a peak temperature of 96 °C was recognized, which had not been reported before. Also from 110 °C to 226 °C, a row of ...