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That's a misprinting. bar6 is equivalent to 3/m. There is no difference between bar6 (or -6) and 3/m. 52: Total number of mirror plane is 9 53: Total number of mirror plane is 1 ...

Dear student 6 bar and 3/m are similar. I think there must be a misprint, there is no point group as -6 3/m. It is either 3/m or -6 and since they are similar the answer will be sa...

Please find solution below..

52. The no. of mirror planes is 9. 53. The no. of mirror planes in 3/m is 1. 54. The no. of faces in 3/m is 6. 55. The no. of faces in 4mm is 8.