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Homework Help: Finding Miller indexes of a vector vertical to known layer

  1. Mar 16, 2016 #1
    1. The problem statement, all variables and given/known data
    Find Miller indexes of the vector that is vertical to the layer (211).

    2. Relevant equations

    3. The attempt at a solution
    I'm not quite sure how to do this. The only thing I came up until now is to invert the numbers (so that I get 1/2, 1 and 1) and then find the vector that is vertical to a vector with these coordinates. But I don't think this is right at all, because this is a layer we are talking about. Not a vector.
  2. jcsd
  3. Mar 16, 2016 #2
    your above statement is not clear to me -why not ask a question :
    What are Miller indexes in an array of atoms/crystalline arrangements ?
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