ZnS晶体3C⇔2H结构转变的LAUE衍射图中“奇异点”的标定

在ZnS晶体3C?2H结构转变的X—射线Laue衍射分析中,为了解释一维无序造成的异常衍射现象,本文推导了Laue衍射图曲线晶带的“奇异点”计算公式。并应用此公式,计算了ZnSLaue衍射照片上数条晶带上的“奇异点”,计算值与实验值完全吻合。另外,本文还对“奇异点”的形成、特点、标定的意义以及计算公式适用范围进行了讨论。

THE INDEXING OF “ANOMALOUS DIFFRACTION SPOTS”IN THE LAUE DIAGRAMS OF ZnS CRYSTAL 3C⇔2H STRUCTURE TRANSFORMATIONS

In the Laue diffraction photographs of ZnS single crystal containing one-dimensional disorder,there are some anomalous diffraction spots which are different from the normal diffraction spots in shape, i. e. so called"Anomalous Diffraction Spots"("ADS") (see Fig. 4-10).In the Laue diffraction analysis of ZnS crystal 3C?2H structure transformations, in order to define the stacking faults,new phases created from the matrix,and their created directions, the "ADS" must be indexed.