data_input

_cell_length_a           4.1491
_cell_length_b           4.1491
_cell_length_c           4.1491
_cell_angle_alpha       90.0000
_cell_angle_beta        90.0000
_cell_angle_gamma       90.0000
_cell_volume              71.43

_symmetry_cell_setting                   'cubic'
_symmetry_Int_Tables_number      225
_symmetry_space_group_name_H-M  'Fm-3m   '

loop_
_atom_site_type_symbol
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Mg   Mg1      0.0000    0.0000    0.0000    1.0000
O    O1       0.5000    0.5000    0.5000    1.0000
