# a fcc lattice

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0   1
C     -1.0   0.0    0.0
C      1.0   0.0    0.0
C      0.0   1.73   0.0
C      2.0   1.73   0.0
C     -1.0   0.0    2.5
C      1.0   0.0    2.5
C      0.0   1.73   2.5
C      2.0   1.73   2.5