a) A unit cell of diamond cubic structure (for example, silicon) has atoms has 8 atoms positioned at 000, % % 0, 0%, 0% , , , , % % %. Calculate the structure factors Fhill and F2. b) GaAs has the same diamond cubic structure, but s atoms are located at 0 0 0, % % 0, 0%, 0% and Zn atoms are at % % % % % % % % % % % %. Determine the structure factor F of ZnS and indicate the cases or conditions for observing intensity. . Si S Zn