I want to be able to estimate what the index of refraction of a material is based upon the chemical makeup of the material. For example what equation would I use to estimate the index of refraction of a material that is 70% Germanium and 30% Diamond?
I found the equation $$n^2 = n_0^2 + m/m1 * (n_1^2-n_0^2)$$ from the link: https://optiwave.com/optifiber-manuals/optical-fiber-refractive-index-of-fibers/ but that doesn't explain what the value m is. Is it a typo? My guess is that they meant to type $m_0$ not $m$ but I'm not sure. Is this equation even correct? I can't find it anywhere else and it didn't list a name or law relating to it.