Refinement of the crystal structures of the La3Ta0.5Ga5.5O14 and La3Nb0.5Ga5.5O14 compounds
作者： A. P. Dudka , B. V. Mill , Yu. V. Pisarevsky
DOI: 10.1134/S106377450904004X
关键词: Space (mathematics) 、 Group (mathematics) 、 Piezoelectricity 、 Crystal structure 、 Crystallography 、 Physics
摘要: This paper reports on the results of accurate X-ray structural investigations single crystals La3Ta0.5Ga5.5O14 (a = 8.2260(1) A, c 5.1207(1) R/Rw 1.09%/1.10%, 3868 unique reflections) and La3Nb0.5Ga5.5O14 8.2237(1) 5.1247(1) 1.02%/1.03%, 3735 (space group P321, Z 1, sinϑ/λ|max ≈ 1.34 A−1 for both compounds). Using sets data with a large number high-angle reflections makes it possible to reliably compare crystal structures by applying statistical tests. The differences between are weakly pronounced, which correlates closeness their piezoelectric characteristics.
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