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Issue 35, 2010
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Defect crystal structure of new TiO(OH)2 hydroxide and related lithium salt Li2TiO3

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Abstract

Crystal structures of TiO(OH)2 and Li2TiO3 have been studied in detail and refined using X-ray powder diffraction data. Both compounds possess a high concentration of defects in the structure. The crystal structure of the Li2TiO3 salt obtained at 700 °C reveals stacking faults of LiTi2 metal layers, which leads to the appearance of short-range order in three possible space groups: C2/c, C2/m, P3112. The possibility to stabilise this imperfect state increases the mobility of the Li+ ions in the structure and allows the complete exchange of lithium by hydrogen in acid water solutions with formation of TiO(OH)2. The crystal structure of TiO(OH)2 belongs to the layered double hydroxide structure type with the 3R1 sequence of oxygen layers and can be described as a stacking of charge-neutral metal oxyhydroxide slabs [(OH)2OTi2O(OH)2]. TiO(OH)2 is the first layered double hydroxide structure formed by a cation with oxidation state +4 only.

Graphical abstract: Defect crystal structure of new TiO(OH)2 hydroxide and related lithium salt Li2TiO3

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Publication details

The article was received on 21 Apr 2010, accepted on 16 Jun 2010 and first published on 10 Aug 2010


Article type: Paper
DOI: 10.1039/C0DT00354A
Citation: Dalton Trans., 2010,39, 8168-8176

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    Defect crystal structure of new TiO(OH)2 hydroxide and related lithium salt Li2TiO3

    N. V. Tarakina, R. B. Neder, T. A. Denisova, L. G. Maksimova, Y. V. Baklanova, A. P. Tyutyunnik and V. G. Zubkov, Dalton Trans., 2010, 39, 8168
    DOI: 10.1039/C0DT00354A

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