Jpn. J. Appl. Phys. 6 (1967) pp. 318-327  |Next Article|  |Table of Contents|
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Growth Ridges, Etched Hillocks, and Crystal Structure of Lithium Niobate

Nobukazu Niizeki, Tomoaki Yamada and Hiroo Toyoda

(Received October 8, 1966)

Growth feature of a LiNbO₃ crystal obtained by the pulling method has been studied. The formation of growth ridges was interpreted as the intermittent growth of the form {102}, which was the most readily grown form from the melt. The point group of the high temperature, paraelectric phase was uniquely determined as 32/m from the symmetry elements of the configuration of ridges.
On (001) planes, the triangular etched hillocks were observed. Orientations of the hillocks on the antiparallel domains were related by 2-fold rotation axis parallel to [100] consistent with the phase transition of the type 32/m→3m.
The atomic arrangement in the form {102} was examined, and a three-dimensional framework of the corner-shared Nb-O octahedra, similar to the one in perovskite, was found.

URL: http://jjap.jsap.jp/link?JJAP/6/318/
DOI: 10.1143/JJAP.6.318

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