Which of the following statements is not true for the crystal structure of cesium chloride ?
has a cubic structure.
and
ions are arranged in a face-centred cubic lattice.
and
ions have a coordination number of 8 and 6, respectively.
The ions are located at the corners of the cube and
ions are at the center of the cube.
is an example of a simple cubic crystal lattice, not a face-centred cubic lattice as stated in option 2. In a simple cubic lattice, the unit cell consists of a cube with lattice points located at the corners of the cube. Each lattice point represents one
ion. Additionally, there is one
ion located at the centre of the cube.
In , each
ion is surrounded by
ions arranged at the corners of a cube around it, resulting in a coordination number of 8 for the
ion. On the other hand, each
ion is surrounded by
ions arranged at the corners of an octahedron around it, resulting in a coordination number of 6 for the
ion. This is stated in option 3.
Therefore, the correct statement regarding the location of and
ions in the
crystal structure is that
ions are located at the corners of the cube and
ions are located at the centre of the cube.
Option 4) incorrectly describes the location of the ion in the
unit cell.