data_image0
_chemical_formula_structural       Si2
_chemical_formula_sum              "Si2"
_cell_length_a       3.8403
_cell_length_b       3.8403
_cell_length_c       3.8403
_cell_angle_alpha    60
_cell_angle_beta     60
_cell_angle_gamma    60

_space_group_name_H-M_alt    "P 1"
_space_group_IT_number       1

loop_
  _space_group_symop_operation_xyz
  'x, y, z'

loop_
  _atom_site_type_symbol
  _atom_site_label
  _atom_site_symmetry_multiplicity
  _atom_site_fract_x
  _atom_site_fract_y
  _atom_site_fract_z
  _atom_site_occupancy
  Si  Si1       1.0  0.00000  0.00000  0.00000  1.0000
  Si  Si2       1.0  0.25000  0.25000  0.25000  1.0000
