2.11 Caesium chloride [CsCl] structure
The Bravais lattice of CsCl is a simple cube. It is an ionic compound. It is considered as the interpenetration of two simple cubic lattices of caesium and chlorine ions along half the body diagonal of a unit cell. The relative positions of the two cube systems are such that, each ion of one type occupies the centre of the cube formed by ions of the other type and vice versa. If caesium ion is present at the origin (000), then chlorine ion is present at the centre point 
of the cube as shown in Fig. 2.17. The co-ordinates of caesium ions are 000, 100, 010, 001, 011, 101, 110 and 111. In this unit cell, each ...
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