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三铌酸锂空间群的会聚束电子衍射测定

物理学报, 1984, 33(11): 1586-1588.
DOI: 10.7498/aps.33.1586
CSTR: 32037.14.aps.33.1586

SPACE GROUP DETERMINATION OF Li2O·3Nb2O5 BY CONVERGENT BEAM ELECTRON DIFFRACTION

Acta Phys. Sin., 1984, 33(11): 1586-1588.
DOI: 10.7498/aps.33.1586
CSTR: 32037.14.aps.33.1586
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  • 摘要

    用会聚束电子衍射图中显现的动力学消光线,测定了三铌酸锂的空间群。结果表明,三铌酸锂有一2次螺旋轴和一垂直它的滑移面,从而空间群是P21/a。同时得出点阵参数a=1.545nm,b=0.503nm,c=0.753nm,β=107°。

     

    Abstract

    Dynamic extinction lines which occur in CBED patterns have been used to determine the presence of twofold screw axis and glide plane in Li2O·3Nb2O5. The space group is found to be P21/a.

     

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