The sometric system s characterised by a 3 axes of 4 fold symmetryy 2 axes of 4 fold symmetry (b) 4 axes of 3 fold symmetry (c) (d) 6 axes of 5 fold symmetry

(B) 4 axes of 3 fold symmetry Point groups belonging to isometric system don't necessarily have 3 axes of 4 fold axes but it must contain 4 axes 3 fold symmetry. It can be seen b...

Isometric system is characterized by 4 axis of 3 fold symmetry that is why in HM symbol of isometric system point group having 3 in every symbol. for example 432, 4/m 3bar 2/m...