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An
example of a crystal structure which can be described using the ideas presented
above is CsCl. Each ion resides on a separate, interpenetrating Simple
Cubic lattice. The cation is in the center of the anion unit cell and
visa versa, so the two lattices have the same unit cell dimensions.
Note that each lattice is simple cubic, not
body centered cubic. In order for a lattice to be body centered, the same
chemical species (e.g., an atom or ion ) would have to reside at the eight
corners and the center of the unit cell.
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