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Andersson‐Magnéli phases TinO2n‐1: recent progress inspired by Swedish scientists

Zhang, Qing, Liu, Weiyan, Zhou, Yi, Li, Junyan, Sun, Tu, Liu, Qingyuan, Ma, Yanhang, Wang, Jinghui, Li, Jun, Zhao, Ruoshi, Sui, Yu, Matsumoto, Takashi, Muroyama, Norihiro, Yamano, Akihito, Harris, Kenneth D. M., Shen, Zhijian James and Terasaki, Osamu 2021. Andersson‐Magnéli phases TinO2n‐1: recent progress inspired by Swedish scientists. Zeitschrift für anorganische und allgemeine Chemie 647 (2-3) , pp. 126-133. 10.1002/zaac.202000408

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Abstract

l conductivity and chemical/thermal stability. Various applications have also been reported for the phases with different values of n, or slightly reduced rutile (TiO2). The characteristic properties of these materials depend strongly on the compositional deviation from TiO2 and the way in which the structure accommodates the deviation. Thus, an urgent requirement is to overcome difficulties in characterizing such materials at atomic resolution. Here, we trace the discovery of the Andersson‐Magnéli phases, and report the application of recent developments in electron microscopy to reveal the relation, at the local level, between structural characteristics and electronic states, specifically for the materials TinO2n‐1 with n=4–8. The electrical conductivity of Ti4O7 has been reported previously to show three clearly distinct states on decreasing temperature from 300 K. For this reason, we focus on Ti4O7 as a representative example of the TinO2n‐1 phases and report structural characteristics at temperatures corresponding to each of the three different phases, focusing on the distribution of Ti3+ and Ti4+ cations from analysis of single‐crystal XRD data. Electron diffraction experiments and electrical conductivity measurements are also reported.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
ISSN: 00442313
Date of First Compliant Deposit: 11 February 2021
Date of Acceptance: 25 December 2020
Last Modified: 12 Feb 2021 15:24
URI: https://orca.cardiff.ac.uk/id/eprint/138470

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