1.

What are type of unit cells ? Give their names.

Answer»

Solution :(i) There are two types of unit cells. a) PRIMITIVE b) Non - primitive
(ii) A unit cell that contains only one LATTICE point is CALLED a primitive unit cell, which is made up from the lattice points at each of the CORNERS.
(iii) In the case of non-primitive unit cells, there are additional lattice points, EITHER on a face of the unit cell or with in the unit cell.


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