A body-centered cubic unit cell has six octahedral voids located at the center of each face of the unit cell, and twelve further ones located at the midpoint of each edge of the same cell, for a total of six net octahedral voids. Altogether, the arrangement of atoms in zincblende structure is the same as diamond cubic structure, but with alternating types of atoms at the different lattice sites. The body-centered cubic system cI has one lattice point in the center of the unit cell in addition to the eight corner points. The primitive cubic system cP consists of one lattice point on each corner of the cube. In other projects Wikimedia Commons. Each sphere in a cF lattice has coordination number These tetrahedral voids are not local maxima and are not technically voids, but they do occasionally appear in multi-atom unit cells. Examples of compounds with this structure include zincblende itself, lead II nitrate , many compound semiconductors such as gallium arsenide and cadmium telluride , and a wide array of other binary compounds. In addition to caesium chloride itself, the structure also appears in certain other alkali halides when prepared at low temperatures or high pressures.
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