论文部分内容阅读
旋转台上区别方解石、白云石的方法是F.J.特涅尔(1949)提出的.池际尚教授的《弗德洛夫法简明教程》(1962,中国工业出版社)一书中曾作过介绍.特涅尔采用投影法鉴别方解石和白云石,比较麻烦.现介绍一种直接在弗氏台上区别这两种矿物的方法. 原理方解石和白云石都是一轴晶负光性的矿物,No>Ne,且No>1.54,Ne<1.54(1.54为树胶的折光率).从No到Ne之间,必有一个Ne’值等于1.54.据光率体椭圆长短半径与Ne’之间关系的公式:Ne’=No·Ne/(No~2sin~2ρ+
The method of distinguishing between calcite and dolomite on a turntable was proposed by FJ Tnell (1949), and introduced by Professor Ichi-chan, Quick Guide to Verdev’s Law (1962, China Industrial Press) .Ternier using projection method to identify calcite and dolomite, more trouble.This article describes a direct difference in the Freescale stage of these two minerals.Methods Calcite and dolomite are axonal crystal negative mineral, No> Ne, and No> 1.54, Ne <1.54 (1.54 is the refractive index of the gum). From No to Ne, there must be a Ne ’value equal to 1.54. According to the luminous body elliptical length and radius of Ne’ Ne ’= No · Ne / (No ~ 2sin ~ 2ρ +