# a fcc lattice, one conventional cell

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0   1
C      0.0   0.0   0.0 
C      0.0   3.0   0.0 
C      3.0   0.0   0.0
C      3.0   3.0   0.0
C      0.0   0.0   3.0
C      0.0   3.0   3.0
C      3.0   0.0   3.0
C      3.0   3.0   3.0
O      1.5   1.5   0.0
O      1.5   0.0   1.5
O      0.0   1.5   1.5
O      3.0   1.5   1.5
O      1.5   3.0   1.5
O      1.5   1.5   3.0