data_Mg2TlCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.36
_cell_length_b   5.36
_cell_length_c   5.36
_cell_angle_alpha   131.71
_cell_angle_beta   131.71
_cell_angle_gamma   70.69
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2TlCr
_chemical_formula_sum   'Mg2 Tl1 Cr1'
_cell_volume   84.29
_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  0.19  0.0  0.19  1.0
  Mg  Mg2  1  0.0  0.19  0.19  1.0
  Tl  Tl3  1  0.0  0.0  0.38  1.0
  Cr  Cr0  1  0.0  0.0  0.0  1.0

data_Mg2TlCr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.21
_cell_length_b   6.21
_cell_length_c   5.36
_cell_angle_alpha   90.0
_cell_angle_beta   125.34
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2TlCr
_chemical_formula_sum   'Mg4 Tl2 Cr2'
_cell_volume   168.57
_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
  Mg  Mg0  4  0.41  0.4  0.01  1.0
  Tl  Tl1  2  0.12  0.5  0.62  1.0
  Cr  Cr2  2  0.0  0.0  0.0  1.0

Mg Mg Tl Cr
Mg Mg Tl Cr 0 3 o o o 0 2 o o o 1 3 o o o 1 2 o o o 2 3 o o o 