data_SiHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.08
_cell_length_b   3.08
_cell_length_c   5.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   125.04
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiHg
_chemical_formula_sum   'Si1 Hg1'
_cell_volume   41.43
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  '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  0.0  0.0  1.0
  Hg  Hg0  1  0.42  0.0  0.67  1.0

data_SiHg
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.84
_cell_length_b   3.08
_cell_length_c   5.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   117.48
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiHg
_chemical_formula_sum   'Si1 Hg1'
_cell_volume   41.43
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  '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  Si0  1  0.0  0.0  0.0  1.0
  Hg  Hg1  1  0.0  0.42  0.67  1.0

Si Hg