Crystal structure and vibrational properties of nonlinear Eu3BWO9 and Nd3BWO9 crystals
2004; Elsevier BV; Volume: 177; Issue: 10 Linguagem: Inglês
10.1016/j.jssc.2004.06.016
ISSN1095-726X
AutoresMirosław Mączka, Paweł E. Tomaszewski, J. Stępień‐Damm, A. Majchrowski, L. Macalik, J. Hanuza,
Tópico(s)Crystal Structures and Properties
ResumoIR, Raman, X-ray, electron absorption and luminescence studies have been performed for novel laser Nd3BWO9 and Eu3BWO9 borotungstates exhibiting non-centrosymmetric crystal structures. The assignment of observed vibrational modes to respective symmetry and vibrations of atoms has been proposed. These studies have shown that vibrational and electronic properties of these crystals can be better explained when P63 symmetry is assumed, instead of previously proposed P3 one. The crystal structure refinement has also confirmed that symmetry of the Eu3BWO9 borotungstates is P63, not P3.
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