论文部分内容阅读
在矿物学中,元素间的类质同象代替会引起矿物晶格常数细微但有规律的变化。因此,精确地测定矿物的晶格常数,有助于我们了解类质同象因溶体中各矿物的组份。 本文利用X射线衍射分析中的外推法对四川石棉矿黑云母片岩中的石榴子石的晶格常数a_o作了精确的测定。 其结果;a_o=11.5305A 因此,可以认为该区的石榴子石属于铝系列,其端元矿物分子主要为铁铝石榴子石,少部分为镁铝石榴石。
In mineralogy, the substitution of inter-elemental isomorphism causes a slight but regular change in the mineral lattice constants. Therefore, the accurate determination of the mineral lattice constant helps us to understand the components of the minerals in the isomorphous solution. In this paper, the lattice constant a_o of garnet in the biotite schist of Shimian, Sichuan Province was accurately determined by extrapolation in X-ray diffraction analysis. As a result, a_o=11.5305A. Therefore, it can be considered that the garnets in this area belong to the aluminum series, and the end-membered minerals are mainly iron-aluminum garnets, and the minor part is magnesium aluminum garnet.