Question

A unit cell of CsCl consists of:

• A. one CsCl unit
• B. two CsCl units
• C. four CsCl units
• D. eight CsCl units

Answer 1

The correct option is A one CsCl unit

A unit cell of $CsCl$ consists of only one unit of $CsCl$. $CSCl$ has body-centered (bcc) arrangement. Each $C{s}^{+}$ is surrounded by $8C{l}^{-}$ ions and each $C{l}^{-}$ ion is surrounded by $8C{s}^{+}$ ions. Therefore, the structure has $8:8$ co-ordination.