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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Pritiprabha Behera posted an Question
August 02, 2020 • 02:16 am
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30 points
30 points
- IIT JAM
- Geology (GG)
This is a mcq.... what is the ans and why?
this is a mcq.... what is the ans and why? .. plzz explain it
2 Answer(s)
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Sajan sarthak
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B will be the answer. because in any crystal system the system is from the starting based on the Axial relationships and the symmetry operators . Option a will be elliminated as in isometric system all the axis must be same in length that is a1 ,a2 ,a3 but tetragonal will not have that relation. and also isometric will have 4 axis of 3 fold symmetry that is not present in tetragonal. c will not be ok already said in the above. d. no there is a limitation of symmetry. see the figure all have same axial relationship but different external appearance of crystal.
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Rahul kumar Best Answer
Ans: (B) grow crystals of different shapes, but all the crystals will have the symmetry of the tetragonal system. Tetragonal system contains 7 different point groups. All point groups belonging to tetragonal system will give rise to different crystal shapes but they all belong same crystal system i.e. tetragonal.