data_La2TlCo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.1
_cell_length_b   4.1
_cell_length_c   8.25
_cell_angle_alpha   102.65
_cell_angle_beta   102.65
_cell_angle_gamma   58.06
_symmetry_Int_Tables_number   1
_chemical_formula_structural   La2TlCo
_chemical_formula_sum   'La2 Tl1 Co1'
_cell_volume   113.85
_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
  La  La1  1  0.83  0.0  0.51  1.0
  La  La2  1  0.26  0.0  0.48  1.0
  Tl  Tl3  1  0.55  0.0  0.99  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0

data_La2TlCo
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.98
_cell_length_b   4.1
_cell_length_c   8.25
_cell_angle_alpha   102.65
_cell_angle_beta   90.0
_cell_angle_gamma   119.03
_symmetry_Int_Tables_number   1
_chemical_formula_structural   La2TlCo
_chemical_formula_sum   'La2 Tl1 Co1'
_cell_volume   113.85
_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
  La  La0  1  0.0  0.17  0.49  1.0
  La  La1  1  0.0  0.74  0.52  1.0
  Tl  Tl2  1  0.0  0.45  0.01  1.0
  Co  Co3  1  0.0  0.0  0.0  1.0

La La Tl Co
La La Tl Co 0 1 + o o 2 3 + o + 
La2CoTl crystallizes in the triclinic P1 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to four equivalent La(2), one Co(1), and one Tl(1) atom. There are a spread of La(1)-La(2) bond distances ranging from 1.82-3.51 Å. The La(1)-Co(1) bond length is 3.97 Å. The La(1)-Tl(1) bond length is 4.14 Å. In the second La site, La(2) is bonded in a 6-coordinate geometry to four equivalent La(1), one Co(1), and one Tl(1) atom. The La(2)-Co(1) bond length is 3.88 Å. The La(2)-Tl(1) bond length is 4.14 Å. Co(1) is bonded in a distorted linear geometry to one La(1), one La(2), and two equivalent Tl(1) atoms. There is one shorter (1.84 Å) and one longer (2.26 Å) Co(1)-Tl(1) bond length. Tl(1) is bonded in a distorted linear geometry to one La(1), one La(2), and two equivalent Co(1) atoms.