occupying the octahedral holes. Notice that the octahedral holes are along the edges (for a net of three cations) and in the center of the cube (one more cation). Thus we have four anions (FCC) and ...

The general formula is AB 2 O 4. The oxygens form an fcc lattice. The A cations occupy tetrahedral holes, and the B cation occupy octahedral holes. It then follows that 1/8 of the tetrahedral holes ...

Figure 1. This 1.30 ct Fancy brownish greenish yellow diamond contains an octahedral-shaped inclusion. Photo by Jian Xin (Jae) Liao. Primary diamond deposits are usually found in mantle-derived ...