Rituraj Borthakur posted an Question
November 12, 2022 • 14:01 pm 30 points
  • IIT JAM
  • Geology (GG)

18. what is the minimum number of forms that an actual crystal must contain in class 1 (pedial) of the triclinic system? (a) 1 (c) 3 (b) 2 (d) 4

18. What is the minimum number of forms that an actual crystal must contain in Class 1 (Pedial) of the Triclinic System? (A) 1 (C) 3 (B) 2 (D) 4

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  • Banibrata majumder

    In pedial class of triclinic crystal system, there is only a single crystal face.

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    but why the answer is 4.. as in answer key..

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    symmetry operation, that is 1 fold rotation. I hope the answer is wrong anyhow.. I am attaching here some notes from Tulane University as reference, link: https://www2.tulane.edu/~sanelson/eens211/32crystalclass.htm

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