Which of the following statements is not correct?

Options

A. The co`-`ordination number of each type of ion in `CsCl` crystal is 8
B. A metal that crystallises in `b.c.c.` structure has a co`-` ordination no. of 12
C. A unit cell of an ionic crystal shares some of its ions with other unit cells
D. The length of the unit cell in `NaCl` is `552 p m` `(r_(Na^(+))=95p m, r_(Cl^(-))=181p m)`

Answer

b

Explanation

In `b.c.c.` structure , co`-`ordination no. is eight.