Electron Density in YTiO3
- 1 October 1997
- journal article
- Published by International Union of Crystallography (IUCr) in Acta crystallographica Section B, Structural science, crystal engineering and materials
- Vol. 53 (5) , 739-744
- https://doi.org/10.1107/s010876819700551x
Abstract
Accurate electron density analyses have been performed on the title compound, yttrium titanate, at room and low temperature using W K\alpha radiation. Room- and low temperature \delta\rho maps are generally consistent. Difference electron densities near the two symmetrically independent O atoms differ markedly. These observations may have significance for understanding the role of the O atom in mediating d-electron interactions between neighbouring Ti coordination polyhedra. Features having lower symmetry than that of the approximately octahedral local environment are observed within the Ti coordination octahedron. Crystal data at room temperature: YTiO3, M r = 184.79, T = 293 K, Pnma, a = 5.6901 (4), b = 7.6130 (7), c = 5.3381 (6) Å, V = 231.24 (4) Å3, Z = 4, D x = 5.308 Mg m-3, \mu(W K\alpha) = 1.02 mm−1, R = 0.024, wR = 0.017, S = 1.64 (2) for 2996 independent reflections. Low temperature: T = 127 K, Pnma, a = 5.690 (4), b = 7.583 (6), c = 5.318 (5) Å, V = 229.5 (3) Å3, D x = 5.35 Mg m−3, \mu(W K\alpha) = 1.02 mm−1, R = 0.021, wR = 0.015, S = 1.80 (2) for 2968 independent reflections.Keywords
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