Abstract
Thermal processes involved during the decomposition course of hydrated holmium acetate (Ho(CH 3COO) 3·3.5H 2O) up to 800°C, in an atmosphere of air, were monitored by thermogravimetry and differential thermal analysis. The gaseous decomposition products were identified by IR- spectroscopy. X-ray diffraction and IR-spectroscopy characterized intermediates and final solid products. The results showed that, Ho-acetate, dehydrates completely in two steps then decomposes to Ho 2O 3 at 570°C, through three noncrystalline unstable intermediates. The oxide obtained at 600 and 800°C possesses a surface area of 31 and 15.0 m 2 g −1, respectively. The volatile decomposition products from the acetate were water vapor, acetic acid, ketene, acetone, methane and isobutene.
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