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I Why does (100) and (010) have the shortest reciprocal lattic

  1. Sep 30, 2016 #1
    Can anyone explain why the two planes (100) and (010) in the HCP structure have the shortest reciprocal lattice vectors?
    I mean it says {001}, but why is (001) not included?
  2. jcsd
  3. Sep 30, 2016 #2
    In the HCP structure you stack alternating layers in a ABAB... sequence. The (001) d-spacing is the distance between two A layers, and that is larger than the (100) d-spacing which is simply the diameter of the (hypothetical) spheres you stack.
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