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ÒÔCe3+²ôÔÓLiBaF3ΪÀý

When Ce31 is incorporated in the LiBaF3 lattice, on a regular lattice site, it must be accompanied by a charge-compensating defect. We have considered as possible sites for Ce3+ in LiBaF3, the Li site and the Ba site, which leave, respectively, excess charges of 2+ and 1+ to be compensated.

(1) Ce3+ on a Ba site, plus an O2+ ion at a nearest F site.

(2) Ce3+ on a Ba site, plus an interstitial F- ion in the nearest neighbor region.

(3) Ce3+ on a Ba site, plus a vacancy at a nearest Li site.

(4) Ce3+ on a Ba site, plus a Li+ at a nearest Ba site.

(5) A Ba vacancy compensating for two Ce3+ substitutions at Ba sites.

(6) Ce3+ on a Li site, plus a vacancy at a nearest Ba site.

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