Distribution, structures and nonlinear properties of noncentrosymmetric niobates and tantalates

Distribution, structures and nonlinear properties of noncentrosymmetric niobates and tantalates

The distribution of 117 noncentrosymmetric niobates and tantalates over different crystal systems and types of space formation of Nb, Ta–O polyhedrons have been revealed. The dependence of polyhedron space formation in the crystal lattice of the compound on stoichiometric concentration (SC) of niobi...

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Veröffentlicht in:Journal of solid state chemistry 2006-04, Vol.179 (4), p.1177-1182
Hauptverfasser: Korotkov, A.S., Atuchin, V.V.
Format: Artikel
Sprache:eng
Schlagworte:
Chemical replacement
CRYSTAL LATTICES
CRYSTALS
DISTRIBUTION
LAYERS
MATERIALS SCIENCE
NIOBATES
Noncentrosymmetric compounds
Nonlinear optics
Polyhedron space formation
STOICHIOMETRY
TANTALATES
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Zusammenfassung:The distribution of 117 noncentrosymmetric niobates and tantalates over different crystal systems and types of space formation of Nb, Ta–O polyhedrons have been revealed. The dependence of polyhedron space formation in the crystal lattice of the compound on stoichiometric concentration (SC) of niobium and tantalum is established. Individual Nb, Ta–O octahedrons are found for SC=19–7.5, and chains and layers of the octahedrons appear in the range SC=11.0–5.2. Only frame formations of Nb, Ta–O octahedrons are possible under SC
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2006.01.019