The difference in crystalline structure among kaolinite

Contrast the difference in crystalline structure among kaolinite, smectites, vermiculite, and illite (fine-grained mica). Include in your answer the tetrahedral to

octahedral (consider dioctahedral only) ratio, isomorphic substitutions type and location, interlayer cations, and their exchangeability, and expendability of the

interlayer.