Extensive Solubility in Solids (as in not intensive)
I am trying to understand the concept of extensive solubility. Generally, solubility is supposed to be an intensive property because it is a material property independent of size, quantity, length, etc. I am having trouble finding a definition for extensive solubility though.
So far, I have found articles that allude to extensive solubility having to do with atom size. Evidently extensive solubility takes place when dissimilar atoms are nearly the same size. And I have seen extensive solubility referred to in several other journal articles.
But I still cannot find a description for what extensive solubility actually is, or what conditions promote extensive solubility. Can someone please shed some light on the subject?