Structure and Specific Heat of Disordered and Ordered Titanium Monoxide TiO_y

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• 作者：A. A. Valeeva ; A. A. Rempel and A. I. Gusev
• 关键词：titanium monoxide ; nonstoichiometry ; disorder&#x2013 ; order phase transition ; Ti5O5 superstructure ; vacancy channels ; Xray diffraction ; differential scanning calorimetry ; specific heat
• 刊名：Journal of Structural Chemistry
• 出版年：2003
• 出版时间：2003
• 年：2003
• 卷：44
• 期：2
• 页码：235-242
• 全文大小：583 KB

文摘

The structure of disordered and ordered titanium monoxide containing structural vacancies in both sublattices was studied by Xray diffraction. The symmetry of the monoclinic Ti₅O₅ superstructure (space group C2/m) was analyzed. The type and channel of the TiO_y–Ti₅O₅ disorder–order transition was determined. The distribution functions of Ti and O atoms in the metal and nonmetal sublattices of titanium monoxide were calculated. The specific heats of TiO_y titanium monoxides (0.8_y were found for the first time. A notable effect of the structural state on the specific heat was detected. In the indicated temperature range, the C_p(T) dependence is adequately described by a function that accounts for the Debye effect and the electronic specific heat.