data_MgZnHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.28
_cell_length_b   3.28
_cell_length_c   6.69
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgZnHg
_chemical_formula_sum   'Mg1 Zn1 Hg1'
_cell_volume   62.13
_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
  Mg  Mg1  1  0.0  0.0  0.28  1.0
  Zn  Zn2  1  0.0  0.89  0.44  1.0
  Hg  Hg0  1  0.64  0.95  0.65  1.0

data_MgZnHg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.28
_cell_length_b   3.28
_cell_length_c   6.69
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgZnHg
_chemical_formula_sum   'Mg1 Zn1 Hg1'
_cell_volume   62.13
_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
  Mg  Mg0  1  0.0  0.0  0.28  1.0
  Zn  Zn1  1  0.0  0.89  0.44  1.0
  Hg  Hg2  1  0.64  0.95  0.65  1.0

Mg Zn Hg