13

O    0.00000000   0.00000000   0.00000000
O    1.00000000   0.00000000   0.00000000
O    0.50000000   0.86602540   0.00000000
O   -0.50000000   0.86602540   0.00000000
O   -1.00000000   0.00000000   0.00000000
O   -0.50000000  -0.86602540   0.00000000
O    0.50000000  -0.86602540   0.00000000
O    0.50000000   0.28867513   0.81649658
O   -0.50000000   0.28867513   0.81649658
O    0.00000000  -0.57735027   0.81649658
O    0.50000000   0.28867513  -0.81649658
O   -0.50000000   0.28867513  -0.81649658
O    0.00000000  -0.57735027  -0.81649658
