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Seek help for space groups in 2 dimensions Bravais lattice

  1. Feb 16, 2013 #1
    Dear experts,
    I'm not familiar with crystal structure theory. I'm seek expertise to figure out space groups in 2 dimensions Bravais lattice of the attached structures. In the figure, red and greens dots represent different atoms. I'll greatly appreciate your help.

    Struture 1
    https://www.physicsforums.com/attachment.php?attachmentid=55823&stc=1&d=1361080231
    structure 2
    https://www.physicsforums.com/attachment.php?attachmentid=55824&stc=1&d=1361080249
    structure 2
    https://www.physicsforums.com/attachment.php?attachmentid=55825&stc=1&d=1361080249
     

    Attached Files:

  2. jcsd
  3. Feb 17, 2013 #2

    Dr Transport

    User Avatar
    Science Advisor
    Gold Member

    do you see any symmetry planes????
     
  4. Feb 17, 2013 #3
    Thank you men. I'm not familiar with space group in 2D bravais lattice. Can you give me your expertise answer?
     
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