《物理》初级中学课文(第二册),高级中学课文(上册)中都讲到——晶体,但学生一般只能从书本的彩图中看到。为了让学生加深对晶体具有特定的结构和几何形状等性质的理解,我们经多次试验,终于制备出蔟生的硫酸铜晶体、七、八颗结晶体姿态各异地蔟生在一起、大小不一但每颗都具有规则的外形、各相应晶面间的夹角都相同,这“蓝宝石花”甚好看,因为是自然析出的晶体是最能说明晶体的特性的,经几年课堂展示,学生很感兴 The physics junior high school text (second volume) and high school text (first volume) all talk about crystals, but students generally can only see them from the book’s color pictures. In order to deepen students’ understanding of the nature of crystals with specific structures and geometric shapes, many experiments have resulted in the preparation of twin copper sulphate crystals, seven or eight crystals with different attitudes and sizes. But every one has a regular shape and the angles between the corresponding crystal planes are the same. This “sapphire flower” is very nice because crystals that are naturally precipitated are the best description of the characteristics of crystals. Students are very excited