一、前言X射线粉末衍射法测量点阵常数在科学研究和生产中具有重要作用。五十年代以前主要用照相法,以德拜照相法最常用。1960年国际结晶学会组织9国16个实验室精确测量了数种标准物质的点阵常数,多数实验室采用照相法。六十年代后,采用衍射仪法测量点阵常数日益增多,因衍射仪具有自动化程度高,收集衍射数据花费时间少,操作简便、灵活等特点。到八十年代,随着电子计算机的 I. Introduction X-ray powder diffraction measurement of lattice constant plays an important role in scientific research and production. Before the fifties the main use of photographic method, the most commonly used Debye photographic method. In 1960, the International Crystallography Society organized 16 laboratories in 9 countries to accurately measure the lattice constants of several kinds of reference materials. Most laboratories adopted the photography method. Since the 1960s, the use of diffractometry to measure lattice constants has been increasing because of the high degree of automation of the diffractometer, the diffraction data collected less time consuming, easy to operate, flexible and so on. To the eighties, with the computer