Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Surface Energy of Miller Index Cross Sections

  1. Jan 29, 2009 #1
    ℽ = ½Nbερa
    ℽ = surface energy
    Nb = number of broken bonds
    ε = bond strength
    ρa = surface atomic density

    {100} = (½)( 2 / a2 )(4)(ε)

    {110} = ( 5 / sqrt(2) )( ε / a2 )

    {111} = (2sqrt(3))( ε / a2 )

    the supplemental picture shows a cube with atoms at each corner and one atom in the middle of each facet of the full cube. the description for {100} says there are four broken chemical bonds, but what about the fifth atom in the center? for {110} is says there are five and for {111} it says three. WHAT?? if you picture the {110} it looks like 6 bonds are broken and for {111} it looks like five to me, am I hallucinating??
    here is a link to make it easier to picture the sections: http://en.wikipedia.org/wiki/Miller_index

  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted

Similar Discussions: Surface Energy of Miller Index Cross Sections
  1. Miller index (Replies: 16)

  2. Miller index problem (Replies: 9)

  3. Cross section (Replies: 3)