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The crystal structure of hexagonal LuMnO3 at room temperature is isomorphous with YMnO3 and deviates in important details from the early work of Yakel et al. Acta Cryst. (1963), 16, 957–962. Mn is near the centre of its oxygen coordination environment. On the threefold axes, the apical O—Lu bonds have alternating long and short bond lengths, leading to ferroelectric behaviour. The sample studied was composed of almost equal volumes of inversion twins.
Aken et al. (Sat,) studied this question.
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