data_image0
_cell_length_a       3.83959
_cell_length_b       3.83959
_cell_length_c       3.83959
_cell_angle_alpha    60
_cell_angle_beta     60
_cell_angle_gamma    60

_symmetry_space_group_name_H-M    "P 1"
_symmetry_int_tables_number       1

loop_
  _symmetry_equiv_pos_as_xyz
  'x, y, z'

loop_
  _atom_site_label
  _atom_site_occupancy
  _atom_site_fract_x
  _atom_site_fract_y
  _atom_site_fract_z
  _atom_site_thermal_displace_type
  _atom_site_B_iso_or_equiv
  _atom_site_type_symbol
  Si1      1.0000 0.00000  0.00000  0.00000  Biso   1.000  Si
  Si2      1.0000 0.25000  0.25000  0.25000  Biso   1.000  Si