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研究矿物的晶体结构与其光学性质之间的关系,这是结构光性矿物学重要的研究内容。如何把矿物晶体结构中原子的性质及相互之间的关系应用到晶体光学中,有效地定量地解释矿物的光学参数,从而又推动晶体光学进一步发展,这是矿物学家所共同关心的问题。早在1924年布拉格就注意到方解石与文石光性的差异,并用晶体内部电场的理论进行解释。帕伯斯特(A.Pabst,1973,1974)在研究两个碳酸盐矿物的折射率时,根据布拉格的方法,计算了它们的折射度,得到了满意的结果。叶大年(1974)在论述具有氖型结构离子的化合物的折射率时,指出矿物的折射率取决于电子层结构和核电荷,而不是取决于原子量。
Studying the relationship between the crystal structure of a mineral and its optical properties is an important part of the study of structural phototrophy. How to apply the properties of the atoms in the crystal structure of crystals to the crystal optics and explain the optical parameters of the minerals quantitatively and thus promote the further development of the crystal optics is a common concern for the mineralogists. As early as 1924, Prague noticed the difference between calcite and aragonite, and explained the theory of electric field inside the crystal. In studying the refractive indices of two carbonate minerals, Papabet (1973, 1974) calculated their refractivities according to Bragg’s method and obtained satisfactory results. Ye Dainian (1974) discussing the refractive index of compounds with neon-type structural ions, pointing out that the refractive index of a mineral depends on the electron-layer structure and the nuclear charge, rather than on the atomic weight.