摘要 研究了四方晶系所有膜面基矢转换原理，选择 (c/a)2作为影响参数和区间转换点的参数，同时引入立方系同指数膜面的基矢作为四方晶系膜面的基矢。分析了40个基本膜面的转换区间，并确定了每一个区间基矢和倒易矢量及顺序，对结果进行了验证。最后，制定了所有四方晶系物质均遵从的1张统一平行四边形表，方便四方晶系电子衍射花样的标定。
关键词 四方晶系 特征平行四边形 标定 Unity of the Characteristic Parallelogram Grid in Tetragonal System
SONG Baolai
(Jiangxi Yuzhou Scientific and Technological Instute, Xinyu 338029)
Abstract In this paper the conversion principle of all diffraction patterns on tetragonal crystal system is studied. (c/a)2 is chosen as the influencing parameter, whose values are as the interval turning points. At the same time, the index of cubic diffraction pattern is chosen as the index of tetragonal crystal system and hexagonal crystal system. And then the conversion interval is analyzed and the reciprocal vector is set to every interval, then the results are proved. At last a unified basic characteristic parallelogram grid of the square system is studied and worked out that is convenient to demarcate the electron diffraction pattern of tetragonal crystal system.
Key words tetragonal crystal system, the characteristic parallelogram, demarcation