data_La2TlGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.56
_cell_length_b   8.56
_cell_length_c   8.56
_cell_angle_alpha   29.52
_cell_angle_beta   29.52
_cell_angle_gamma   29.52
_symmetry_Int_Tables_number   1
_chemical_formula_structural   La2TlGe
_chemical_formula_sum   'La2 Tl1 Ge1'
_cell_volume   134.94
_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  0.0  0.0  0.48  1.0
  La  La2  1  0.0  0.0  0.07  1.0
  Tl  Tl3  1  0.0  0.0  0.28  1.0
  Ge  Ge0  1  0.0  0.0  0.0  1.0

data_La2TlGe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.56
_cell_length_b   4.36
_cell_length_c   8.56
_cell_angle_alpha   90.0
_cell_angle_beta   107.11
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   La2TlGe
_chemical_formula_sum   'La4 Tl2 Ge2'
_cell_volume   269.88
_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
  La  La0  2  0.0  0.0  0.52  1.0
  La  La1  2  0.0  0.0  0.93  1.0
  Tl  Tl2  2  0.0  0.0  0.72  1.0
  Ge  Ge3  2  0.0  0.0  0.0  1.0

La La Tl Ge
La2TlGe is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two La2TlGe clusters. There are two inequivalent La sites. In the first La site, La(1) is bonded in a single-bond geometry to one Tl(1) atom. The La(1)-Tl(1) bond length is 1.77 Å. In the second La site, La(2) is bonded in a distorted linear geometry to one Tl(1) and one Ge(1) atom. The La(2)-Tl(1) bond length is 1.77 Å. The La(2)-Ge(1) bond length is 0.60 Å. Tl(1) is bonded in a linear geometry to one La(1) and one La(2) atom. Ge(1) is bonded in a single-bond geometry to one La(2) atom.