data_K2TlSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.17
_cell_length_b   6.17
_cell_length_c   6.17
_cell_angle_alpha   130.83
_cell_angle_beta   130.83
_cell_angle_gamma   72.09
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2TlSi
_chemical_formula_sum   'K2 Tl1 Si1'
_cell_volume   131.37
_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
  K  K0  1  0.57  0.0  0.49  1.0
  K  K1  1  0.0  0.57  0.49  1.0
  Tl  Tl3  1  0.0  0.0  0.99  1.0
  Si  Si2  1  0.0  0.0  0.0  1.0

data_K2TlSi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.26
_cell_length_b   7.26
_cell_length_c   6.17
_cell_angle_alpha   90.0
_cell_angle_beta   126.04
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2TlSi
_chemical_formula_sum   'K4 Tl2 Si2'
_cell_volume   262.73
_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
  K  K0  4  0.29  0.22  0.07  1.0
  Tl  Tl1  2  0.01  0.0  0.01  1.0
  Si  Si2  2  0.0  0.0  0.0  1.0

K K Tl Si