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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Mayank Mishra Best Answer
Tetrahedron can be found in tetratoidal 23 and hextetrahedral bar43m both. In Nesse, the point group classification has been done on a deeper level, for each crystal system but in Tulane, the most common ones are given. Like Tetrahedron occurs most commonly in hextetrahedral but also occurs in tetratoidal. Both options must be remembered. I hope you got it now. Thanks and Regards.