How do I calculate the lattice sums A12 and A6 for a BCC structure?
I have calculated the following so far:
A12 = 8(1/1)^12 + 6(1/root2)^12 + 12(1/2)^12 + 16(1/root5.5)^12 + 8(1/root6)^12 = 8.097.
Have i made any mistakes? Are my nearest neighbour values correct? Please help! o:)