Crystal structure and vibrational properties of nonlinear Eu3BWO9 and Nd3BWO9 crystals

• Published in: Journal of solid state chemistry Vol. 177; no. 10; pp. 3595 - 3602
• Main Authors: Mączka, M., Tomaszewski, P., Stępień-Damm, J., Majchrowski, A., Macalik, L., Hanuza, J.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01-10-2004; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Crystal structure; Electronic transitions; Exact sciences and technology; Inorganic compounds; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other solid inorganic materials; Phonon properties; Photoluminescence; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Water, oxides, hydroxides, peroxides; Phonon properties; Electronic transitions; Crystal structure; Raman spectra; Non centrosymmetric crystals; Inorganic compounds; Transition element compounds; Luminescence; Refinement; Infrared spectra; Rare earth compounds; X-ray absorption; Experimental study; Neodymium tungstates; Hexagonal lattices; Electronic structure; Europium tungstates; Boron Tungstates; Vibrational modes; Optical materials; Quaternary compounds; Nonlinear optics
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2004.06.016

IR, 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.