An element crystallises in a b.c.c. lattice. Nearest and next nearest neighbours are respectively

Question

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

Tardigrade Admin · Accepted Answer

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.

Q. An element crystallises in a b.c.c. lattice. Nearest and next nearest neighbours are respectively

8,8

8,6

6,8

6,6

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.