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Sphere/Atom packing - most efficient lattices?

  1. Dec 19, 2011 #1
    From wikipedia i have this quote: The fcc value is the highest theoretically possible value for any lattice, although there are other lattices which also achieve the same value, such as hexagonal close packed and one version of tetrahedral bcc

    What is the tetrahedral BCC which they refer to? Anyone know where i can see an image of this packing? Was tempted to post this in the solid state physics section since it does refer to crystal lattices but wasn't sure it was the best place. Thanks
  2. jcsd
  3. Dec 19, 2011 #2
  4. Dec 19, 2011 #3
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