data_CaTlSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.2
_cell_length_b   4.73
_cell_length_c   6.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaTlSi2
_chemical_formula_sum   'Ca1 Tl1 Si2'
_cell_volume   92.87
_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
  Ca  Ca0  1  0.0  0.0  0.0  1.0
  Tl  Tl3  1  0.6  0.0  0.07  1.0
  Si  Si1  1  0.6  0.37  0.19  1.0
  Si  Si2  1  0.6  0.37  0.94  1.0

data_CaTlSi2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.2
_cell_length_b   4.73
_cell_length_c   6.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaTlSi2
_chemical_formula_sum   'Ca1 Tl1 Si2'
_cell_volume   92.87
_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
  Ca  Ca0  1  0.0  0.0  0.0  1.0
  Tl  Tl1  1  0.6  0.0  0.07  1.0
  Si  Si2  1  0.6  0.37  0.19  1.0
  Si  Si3  1  0.6  0.37  0.94  1.0

Ca Tl Si Si
Ca Tl Si Si 0 1 - o o 2 3 o o - 