石英的结晶度指数及其标型意义

用Ｘ射线粉晶衍射方法测量石英的衍射峰，计算得到几种结晶并指数，这些指数定量地反映了石英矿物的内部结构完整性─结晶度。石英的结晶度可以作为估计矿床形成深度的标志。石英的结晶度随其形成世代从早到晚而增大，随形成方式不同而具较大差别。结晶度还可以指示矿化作用特征，并作为找矿标型特征；不同产状和成因类型的石英具有不同的结晶度指数。变质作用和重结晶作用能提高石英的结晶度。石英的结晶度还可以用于构造应力的分析。

THE CRYSTALLINITY OF QUARTZ AND ITS TYPOMORPHIC SIONIFICANCE

X-ray diffraction peaks of quartz minerals,which indicate the wide range of crys-tallinity,are measured quantitatively utillzing the powder method.Several types of the crys-tallinity index,which reflect quantitatively quartz internal crystal structural perfection or crys-tallinity,are obtained by ealculating from the profiles. The crystallinity can be considered as markers to estimate the mineralization depth of deposits,and as prospecting typomorphic charac-teristics. The crystallinity index of quartz increases with the generations from early stage to late stage and is different from each other in various process of formation. Quartz minerals in diffe-rent occurrences and geneses have various characteristic crystal linity index. Metamorphism and recrystallization can increase quartz crystallinity.The crystallinity of quartz may be used for analysis of structural stress.