Structure and Thermal Transformations of Hydrated Magnesium Silicates
The article is devoted to an estimation of phase transformations of silicates magnesium at heating in the temperatures range from 0°C to 1100°С. The object of study is a silicates of magnesium containing oxide nickel ore. Differentially-thermal (NETZSCH 449 C - Jupiter), weights – spectrometer (QMS 403 C Aёolos), high-temperature X-ray diffraction, electron-probe microanalysis (JSM - 5900 LV) and chemical analysis methods have been used in the study. The temperature ranges of existence Mg6[(OH)8Si4O10] and Mg2Si2O6 are obtained. Parameters of an elementary cell of the above minerals and their changes with temperature and features of nickel distribution in magnesium silicates with various ration MgO/SiO2 are defined in this work.
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
E. N. Selivanov et al., "Structure and Thermal Transformations of Hydrated Magnesium Silicates", Defect and Diffusion Forum, Vols. 312-315, pp. 708-712, 2011