中学教材上常载有食盐等美丽单晶的彩色照片。它告诉我们:晶体不但内部质点呈有规律的空间排列,而且具有整齐的外形。良好的单晶不仅为小学、中学以至大学的教学所需要,同时也是研究晶体结构如:x-射线衍射法测定结构时所必需。虽然制备单晶的方法已经有多种,但最简单且最有效的方法莫过于最近发展起来的液体扩散结晶法。 High school textbooks often contain color photos of beautiful single crystals such as salt. It tells us that crystals not only have a regular spatial arrangement of internal particles, but also have a neat appearance. Good single crystals are not only needed for teaching in elementary schools, middle schools, and universities, but also necessary for studying crystal structures such as x-ray diffraction. Although there are many methods for preparing single crystals, the simplest and most effective method is the recently developed liquid diffusion crystallization method.