The face centered cubic (FCC) unit cell begins with a totally different layer, one that is packed much more efficiently. ... This generates an ABC pattern. Reset Lattice: The fourth layer, eclipsing ...

The structure has face-centered cubic symmetry, and is a little heavy to understand. The general formula is AB 2 O 4. The oxygens form an fcc lattice. The A cations occupy tetrahedral holes, and the B ...