Ans: The minerals that are present in the Olivine group often crystallize in the system of orthorhombic elements. It has isolated silicate tetrahedral that means Olivine is considered to be nesosilicate. This Olivine structure is often explained as hexagonal, has a close-packed array of O2 ions with about 50 percent of octahedral sites that are occupied with high concentrations of magnesium and iron ions. There are mainly three distinct O2 sites that are present. It is marked as Oxygen 1 (O1), Oxygen 2 (O2), and Oxygen 3 (O3). There are a couple of distinct metal sites that are termed as M1 and M2. However, there is only one silicon site that is present. The O1, O2, Si, and M2 are present on the mirror planes. The M1 is present on the inversion center. However, the O3 is present in the general position.