title: X-ray diffraction studies on the thermal decomposition mechanism of nickel hydroxide.
abstract: Nickel hydroxide samples were prepared by using sodium hydroxide and ammonium hydroxide as precipitating agents. The powder X-ray diffraction pattern shows that the degrees of crystallinity in these samples are quite different. The thermal decomposition mechanism of these two nickel hydroxide samples has been determined using powder X-ray diffraction and thermogravimetric analysis. We observe that the transformation of nickel hydroxide to nickel oxide in the crystalline sample is via a two-phase mixture, whereas in a poorly ordered sample, it is through a single phase. This indicates that the decomposition mechanism mainly depends on the preparative conditions and the nature of the sample.
authors.affiliation: Department of Chemistry, Central College, Bangalore University, Bangalore 560 001, India. adityaramesh77@yahoo.com
authors.forename: Thimmasandra Narayan
authors.initials: TN
authors.lastname: Ramesh