Morphological changes in nickel hydroxide particles, which are formed during the entire process of precipitation from nickel nitrate in a solution of ammonia at constant pH, were described.
A transition of the amorphous phase to a crystalline phase was detected by x-ray diffraction study.
An analysis of the causes (change in the degree of supersaturation of the solutions with time depending; upon the pH and tendency to approach the equilibrium forms of the crystals according to the Gibbs-Wulf principle), responsible for the change in the form of the particles during the precipitation and aging of nickel hydroxide, was given.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 1936–1939, September, 1967.
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Rubinshtein, A.M., Dashevskii, M.I., Yakerson, V.I. et al. Electron microscopic and x-ray diffraction investigation of the process of formation of nickel hydroxide during precipitation. Russ Chem Bull 16, 1858–1861 (1967). https://doi.org/10.1007/BF00909571