1.

(a) Tetragonal unit cell (b) Triclinic unit cell (c ) Frenkel defect.

Answer»

Solution :(a)
edges are, `a = b ne C` and ANGLES are `alpha=beta=gamma=90^(@)`
(b)
edges are `a ne b ne c` and angles are `alpha ne beta ne gamma ne 90^(@)`
(c )


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