Complex sentence: Pauling (1960), p.561 One of Pauling's examples is olivine, (Mg, Fe) 2 SiO 4, whose structure contains distinct SiO 4 tetrahedra which do not share any oxygens (at corners, edges or faces) with each other.
Split into simpler sentences: Pauling (1960), p.561 One of Pauling's examples is olivine, M 2 SiO 4, where M is a mixture of Mg 2 + at some sites and Fe 2 + at others. The structure contains distinct SiO 4 tetrahedra which do not share any oxygens (at corners, edges or faces) with each other.