       48
surface structure 
O            0.00000000        0.00000000        4.21100000
O            0.00000000        4.21100000        4.21100000
O            4.21100000        0.00000000        4.21100000
O            4.21100000        4.21100000        4.21100000
O            2.10550000        2.10550000        4.21100000
O            2.10550000        6.31650000        4.21100000
O            6.31650000        2.10550000        4.21100000
O            6.31650000        6.31650000        4.21100000
Mg           2.10550000        0.00000000        4.21100000
Mg           2.10550000        4.21100000        4.21100000
Mg           6.31650000        0.00000000        4.21100000
Mg           6.31650000        4.21100000        4.21100000
Mg           0.00000000        2.10550000        4.21100000
Mg           0.00000000        6.31650000        4.21100000
Mg           4.21100000        2.10550000        4.21100000
Mg           4.21100000        6.31650000        4.21100000
O            0.00000000        2.10550000        2.10550000
O            0.00000000        6.31650000        2.10550000
O            4.21100000        2.10550000        2.10550000
O            4.21100000        6.31650000        2.10550000
O            2.10550000        0.00000000        2.10550000
O            2.10550000        4.21100000        2.10550000
O            6.31650000        0.00000000        2.10550000
O            6.31650000        4.21100000        2.10550000
Mg           2.10550000        2.10550000        2.10550000
Mg           2.10550000        6.31650000        2.10550000
Mg           6.31650000        2.10550000        2.10550000
Mg           6.31650000        6.31650000        2.10550000
Mg           0.00000000        0.00000000        2.10550000
Mg           0.00000000        4.21100000        2.10550000
Mg           4.21100000        0.00000000        2.10550000
Mg           4.21100000        4.21100000        2.10550000
O            0.00000000        0.00000000        0.00000000
O            0.00000000        4.21100000        0.00000000
O            4.21100000        0.00000000        0.00000000
O            4.21100000        4.21100000        0.00000000
O            2.10550000        2.10550000        0.00000000
O            2.10550000        6.31650000        0.00000000
O            6.31650000        2.10550000        0.00000000
O            6.31650000        6.31650000        0.00000000
Mg           2.10550000        0.00000000        0.00000000
Mg           2.10550000        4.21100000        0.00000000
Mg           6.31650000        0.00000000        0.00000000
Mg           6.31650000        4.21100000        0.00000000
Mg           0.00000000        2.10550000        0.00000000
Mg           0.00000000        6.31650000        0.00000000
Mg           4.21100000        2.10550000        0.00000000
Mg           4.21100000        6.31650000        0.00000000
