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(a) Structure of a typical A2B2O7 pyrochlore, with expansions of the local environments of the Wykoff 16c (A), 16d (B), and 8a and 48f (O) sites. (b) Possible arrangements of Sn and Ti on the six NNN B sites that surround the pyrochlore A and B sites. See the Supporting Information for the numbering scheme used.
