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Figure 4
Schematic diagram of the threefold defect pair formed by the optical excitation of lone pair (LP) electrons on adjacent chalcogen atoms: [2C^*_2 \rightarrow (C^0_3-C^0_3)], where [C^*_2] denotes twofold excited lone-pair states.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 5| Part 3| May 1998| Pages 1001-1003
https://doi.org/10.1107/S0909049597014301
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