The Gladstone-Dale relationship; Part III, Some general applications

ABsrRAcr Although the Gladstone-Dale relationship is most often used to calculate either the mean refractive index or the density, the most useful quantities derived from the relationship are the two values of K. The chemical refractive energy, Kg, is calculated from the weight percentages of the constituents and their specific refractive energy constants: the physical refractive energy, Kp, is calculated from the mean refractive index and the density. The ratio Kp/Kc serves as a measure of the conrpatibility of the refractive index, density and chemical data. Where | - (Kp/Kc) is from -{-0.000 to !0.019, the compatibility of the data i: considered superior; from -10.020 to:!0.039 it is excellent, from :t0.040 to i0.059 it is good, from :t0.060 to *0.079 it is fair, and greater than a0.079 it is poor.