data_ZrTi2Hg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.09
_cell_length_b   3.09
_cell_length_c   8.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZrTi2Hg
_chemical_formula_sum   'Zr1 Ti2 Hg1'
_cell_volume   79.24
_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
  Zr  Zr3  1  0.0  0.0  0.0  1.0
  Ti  Ti1  1  0.55  0.55  0.18  1.0
  Ti  Ti2  1  0.55  0.55  0.11  1.0
  Hg  Hg0  1  0.0  0.0  0.15  1.0

data_ZrTi2Hg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.37
_cell_length_b   4.37
_cell_length_c   8.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZrTi2Hg
_chemical_formula_sum   'Zr2 Ti4 Hg2'
_cell_volume   158.48
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Zr  Zr0  2  0.0  0.0  0.0  1.0
  Ti  Ti1  2  0.05  0.5  0.11  1.0
  Ti  Ti2  2  0.05  0.5  0.18  1.0
  Hg  Hg3  2  0.0  0.0  0.15  1.0

Zr Ti Ti Hg
Zr Ti Ti Hg 0 3 o o o 1 2 o o o 