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本文报导了我国卅多个矿区四十七个珍珠岩、松脂岩样品的折射率(N)的测定结果,其最大N为1.5033,最小N为1.4909,平均值为1.4994。 天然酸性玻璃熔岩的折射率与各氧化物间具有不同的相关性,密切有关的组分为SiO_2,Al_2O_3,Fe_2O_3+FeO。用电子计算机进行了线性回归分析,导得了以下关联式: SiO_2=554.55-322.45N y=1.6034x_1+2.6853x_2+1.5522x_3 以上两式计算结果与实测值符合良好。
This paper reports the results of the determination of the refractive index (N) of 47 perlite and turpentine samples from various mining areas in China. The maximum N is 1.5033, the minimum N is 1.4909 and the average is 1.4994. The refractive index of natural acidic glass lava has a different correlation with each oxide. The closely related components are SiO 2, Al 2 O 3, Fe 2 O 3 + FeO. A linear regression analysis using a computerized computer has resulted in the following correlation: SiO 2 = 554.55-322.45N y = 1.6034x_1 + 2.6853x_2 + 1.5522x_3 The above results agree well with the measured data.