data_TlB2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.81
_cell_length_b   2.81
_cell_length_c   8.25
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TlB2As
_chemical_formula_sum   'Tl1 B2 As1'
_cell_volume   65.09
_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
  Tl  Tl3  1  0.4  0.4  0.75  1.0
  B  B1  1  0.4  0.4  0.9  1.0
  B  B2  1  0.0  0.0  0.78  1.0
  As  As0  1  0.0  0.0  0.94  1.0

data_TlB2As
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.97
_cell_length_b   3.97
_cell_length_c   8.25
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TlB2As
_chemical_formula_sum   'Tl2 B4 As2'
_cell_volume   130.18
_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
  Tl  Tl0  2  0.4  0.0  0.75  1.0
  B  B1  2  0.0  0.0  0.78  1.0
  B  B2  2  0.4  0.0  0.9  1.0
  As  As3  2  0.0  0.0  0.94  1.0

Tl B B As
TlBBAs crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two arsinoborane molecules and two TlB clusters. In each TlB cluster, Tl(1) is bonded in a distorted single-bond geometry to one B(1) atom. The Tl(1)-B(1) bond length is 1.31 Å. B(1) is bonded in a single-bond geometry to one Tl(1) atom.