Question
Chemistry Question on The solid state
An element crystallises in a b.c.c. lattice. Nearest and next nearest neighbours are respectively
A
8,8
B
8,6
C
6,8
D
6,6
Answer
8,6
Explanation
Solution
In a b.c.c. structure C.N. (Every atoms touches 8 other atoms, 4 in a layer below it and 4 In a layer above it) However, there are 6 other atoms (in six adjacent cubic sites) which are only slightly away from it. Thus, these 6 atoms are the next nearest neighbours.