Ti K 边 XANES 谱中预边特征随温度的变化在 ATiO₃（A = Ca 和 Sr）、A₂TiO₄（A = Mg 和 Fe）、金红石 TiO₂和锐钛矿 TiO₂中的研究。
Temperature dependence of pre-edge features in Ti K-edge XANES spectra for ATiO₃ (A = Ca and Sr), A₂TiO₄ (A = Mg and Fe), TiO₂ rutile and TiO₂ anatase.
机构信息
Graduate School of Sciences and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
出版信息
J Synchrotron Radiat. 2013 Jul;20(Pt 4):641-3. doi: 10.1107/S0909049513009175. Epub 2013 May 1.
XANES (X-ray absorption near-edge structure) spectra of the Ti K-edges of ATiO3 (A = Ca and Sr), A2TiO4 (A = Mg and Fe), TiO2 rutile and TiO2 anatase were measured in the temperature range 20-900 K. Ti atoms for all samples were located in TiO6 octahedral sites. The absorption intensity invariant point (AIIP) was found to be between the pre-edge and post-edge. After the AIIP, amplitudes damped due to Debye-Waller factor effects with temperature. Amplitudes in the pre-edge region increased with temperature normally by thermal vibration. Use of the AIIP peak intensity as a standard point enables a quantitative comparison of the intensity of the pre-edge peaks in various titanium compounds over a wide temperature range.
XANES（X 射线吸收近边结构）光谱测量了 Ti K 边缘的 ATiO3（A=Ca 和 Sr）、A2TiO4（A=Mg 和 Fe）、金红石 TiO2 和锐钛矿 TiO2 在 20-900 K 温度范围内的 XANES 光谱。所有样品中的 Ti 原子都位于 TiO6 八面体位置。吸收强度不变点（AIIP）位于预边和后边缘之间。在 AIIP 之后，由于德拜-沃勒因子效应，随着温度的升高，振幅衰减。在预边区域的振幅通常通过热振动随温度升高而增加。使用 AIIP 峰值强度作为标准点，可以在很宽的温度范围内对各种钛化合物的预边峰强度进行定量比较。
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