The following diagram shows the arrangement of lattice points with `a = b = c` and `alpha = beta = gamma = 90^(@)`. Choose the correct options.

Options

A. The arrangement is `sc` with each lattice point surrounded by `6` nearest neighbours.
B. The arrangement is `sc` with each lattice point surrounded by `8` nearest neighbours.
C. The arrangement is fcc with each lattice point surrounded by `12` nearest neighbours.
D. The arrangement is bcc with each lattice point surroundeed by `8` nearest neigbours

Answer

A

Explanation

It is clear from that the arrangement is sc, with coordination number (CN) of each point `= 6`.
(The arrangement shown in figure consists of `4` unit cells. Taking a view of one unit cell, the atoms are not present at the face centres of each unit cell, hence it cannot be fcc, since in fcc lattice points are occpied at corners and face centres of each unit cell.