Is there any way to learn this concept?. please suggest

Answer will be (B) Isometric system. m3m is a centrosymmetric class of cubic system (including m3, if the point group is like m 3bar m then it is equivalent to hexoctahedral class ...

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The second symbol is a 3 fold axis so you can guess it as Isometric system which contains 4 axis of 3 fold symmetry. i.e the characteristics of isometric system. But m3m HM symbo...

Answer (B) Isometric system Yes, there is a concept behind identifying the point groups. Any point group is expressed in form of "abc". If b= 3 or bar3 then the point group will b...