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Figure 11
(a) Visualization of the tight-binding modes corresponding to the Bi T2u modes of Bi2Ti2O7. (b) The Bi T2u mode set, showing the Bi atom displaced from its nominal 180° O′—Bi—O′ angle, orthogonal to the linear axis; this is reflected in the small magnitude of the Bi A2u-derived modes.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 48| Part 5| October 2015| Pages 1560-1572
https://doi.org/10.1107/S1600576715016404
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