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Figure 2
(a) An ellipsoid (50% probability) plot for the major component of the mono-selenide model. (b) A plot of |Fobs| vs |Fcalc| values for the mono-selenide model. Note the extent of scatter in the plot. (c) A difference-electron density map reveals positive (green) electron density at the chalcogen site and negative (red) contours at the phospho­rus sites. Small peaks within the positive density are represented by coloured dots. The single Se atom in trial 1 is split with occupancies of 0.526 (2) and 0.474 (2) over the two chalcogen sites.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 79| Part 4| April 2023| Pages 246-253
https://doi.org/10.1107/S2056989023002700
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