Ta. Eremina et al., Simulation of a defect region in KDP crystals doped with divalent iron ions. Comparison of defects induced by di- and trivalent metals, CRYSTALLO R, 46(1), 2001, pp. 75-80
The crystal structure of Fe-II-doped KDP crystals was simulated with the us
e of specially developed paltry covalent potentials. Different variants of
introduction of impurity into the structure were analyzed. The M1 position
was found to he more favorable for both isolated divalent and trivalent met
al ions. Upon optimization, the coordinates of the Fe-II ion are (0.25, 0.4
4, 0. 125). The Fe-II ions can aggregate to form "clusters" energetically m
ore favorable than isolated defects. It seems that Fe-III ions cannot form
aggregates. (C) 2001 MAIK "Nauka/Interperiodica".