How many next nearest neighborhood respectively each potassium has in bcc lattice?
closed as off-topic by Jan, M.A.R. ಠ_ಠ, ron, bon, Todd Minehardt Oct 29 '15 at 0:02
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Second nearest neighbors are the neighbors of the first neighbors. So for BCC let's consider the atom at the body centre, for this atom the atom at the corner are nearest and for the atoms at the corners the atom at body centres of other cubes are nearest. Little imagination(there are 6 body centred atoms surrounding the atom we are considering) and counting gives the answer as six.