Internal Structure of Palygorskite-Sepiolite Group

They are finely fibrous minerals still they have many struetural similarities with the other elay minerals. They have t-sheets like the other phyllosilicates, but the eationie oetahedra are linked together to form ehains or ribbons, not the o-sheets like other phyllosilicates. These octahedral chains are attached to the f-sheets, with much vacant spaces left in between them. Those vacant channels can accommodate water molecules and also organic molecules. 

This chapter deals about the internal structure of the cl minerals, which determines their response to the physical and chemical changes. The chemical and thermodynamic aspects which control the formation process will be discussed in the next chapter, and the physical properties are presented in Chapter 5. 

The variation of anionic groups controls the mineral characters. Elaborate with examples. 

Explain the different type of atomic packing to construct crystals of various morphologies. 

Crystal property has an impact on physical properties of minerals explain with suitable examples. 

---