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Homework Help: Surface density diamond structure [1 1 1]

  1. Jul 22, 2015 #1
    1. The problem statement, all variables and given/known data
    Calculate the surface density (planar density) of the Silicon diamond structure in the [1 0 0],[1 1 0],[1 1 1] planes.
    Given a = 5.431 A (latice constant)

    Hint: For the (111) plane, it should help you to think of the diamond lattice as two interpenetrating FCC lattices.

    2. The attempt at a solution
    I managed to solve [1 0 0] and [1 1 0](2/a^2 and 4/sqrt(2)*a^2) I have also got a result for [1 1 1](2/(sqrt(3)/2*a^2)) but I completly ignored the hint in the description.
  2. jcsd
  3. Jul 27, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. Jul 29, 2015 #3


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    Homework Helper

    The hint helps to imagine the diamond structure. You do not need it if you know how it looks like.
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