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Gurmeet singh Asked a Question
November 9, 2020 3:29 pmpts 30 pts
  • IIT JAM
  • Geology (GG)

A five-fold axis of symmetry is present in: a quartz c. tourmaline b. riebeckite d. none of these.

A five-fold axis of symmetry is present in: A Quartz C. Tourmaline B. Riebeckite D. None of these (BHU-2010)
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  • Sajan sarthak sahoo Best Answer
    5 fold generally doesn't exist Quartz hexagonal system crystallization so 6 fold. tourmaline also 6 fold , and ribeckite monoclinic so 1 fold
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  • Rahul pandey thankyou
    Answer (D) None of these Five fold axis of symmetry doesn't exist in any crystal because five fold axis of symmetry can't produce a complete crystal lattice upon repetition. In na...
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