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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
September 25, 2020 • 17:35 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir please explain the concept of zone in crystal. 2. what do we means by (111), (010) etc.
Zones A zone is defined as a group of crystal faces that intersect in parallel edges. All the faces belonging to a particular zone are parallel to a common axis and this axis is
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Rahul kumar![best-answer]()
zone is a set of crystal faces whose pairwise intersection line is parallel to a given lattice direction, called the zone axis. There are certain symbols in Crystallography, which you should take care of- 1. [100]- It indicates a direction i.e., zone axis parallel to Crystallographic axis "a" 2. {100}- It indicates form of a crystal i.e., a set of faces related by symmetry 3. (100)- It indicates miller indices i.e., a plane parallel to bc plane of Crystallography. (111)&,(010) are miller indices of two different planes. (111) is a plane having equal intercept on all three axis and (010) is a plane parallel to ac Crystallographic plane. [111]&[010] are the zone axis and indicating a direction.