Concept explainers
Interpretation:
The smallest repeating unit has to be identified.
Concept Introduction:
Simple cubic unit:
A simple cubic unit cell is the simplest form of a cubic unit cell. A cube has eight vertices, twelve edges and six faces. Similarly a cubic unit cell has eight vertices, twelve edges and six faces. If in a cubic unit cell, the components occupy only the eight vertices, then the unit cell is known as simple cubic unit cell.
Figure 1
A simple cubic unit cell has its all the eight vertices arranged with atoms in it. Thus eight atoms are arranged in a simple cubic unit cell in eight vertices. Each atom in a vertex is shared by eight neighboring unit cells. Each layer of a lattice has four unit cells and the upper or lower to that layer has four unit cells. So, each simple cubic unit cell has
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General Chemistry: Atoms First
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