The diagram of Fig. 12.22 shows a plan view of a structure of cubic ZnS (zincblende) looking down the z axis. The numbers attached to some atoms represent the heights of the atoms above the z = 0 plane expressed as a fraction of the cube edge a. Unlabeled atoms are at z = 0 and z = a. (a) What is the Bravais lattice type? (b) Describe the basis. (c) Given that a = 0.541 nm, calculate the nearest- neighbor Zn-Zn, Zn-S, and S-S distances. Zn= S =

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