The cesium ion located at the center of this unit cell is completely within the cell. Chloride ions at the corners are each shared by a total of eight unit cells. Thus there would be one-eighth of a chloride at each corner in this cell.

The cesium ion at the center and the eight partial chloride atoms at eight corners gives a total of one Cs⁺ ion and one Cl^- ion in the CsCl unit cell.

Click the link on the right to view the contents of a CsCl unit cell.