The structure described by Hg3TlSb2Br3 crystallizes in the orthorhombic Pbcm space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 3-coordinate geometry to two equivalent Sb(1) and one Br(3) atom. In the second Hg site, Hg(2) is bonded to two equivalent Sb(1), one Br(1), and one Br(2) atom to form distorted HgSb2Br2 trigonal pyramids that share corners with two equivalent Sb(1)Hg3Sb tetrahedra. In the third Hg site, Hg(3) is bonded in a linear geometry to two equivalent Sb(1) atoms. Tl(1) is bonded in a distorted single-bond geometry to one Br(1) atom. Sb(1) is bonded to one Hg(1), one Hg(2), one Hg(3), and one Sb(1) atom to form SbHg3Sb tetrahedra that share corners with three equivalent Sb(1)Hg3Sb tetrahedra and  a cornercorner with one Hg(2)Sb2Br2 trigonal pyramid. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a water-like geometry to one Hg(2) and one Tl(1) atom. In the second Br site, Br(2) is bonded in a distorted single-bond geometry to one Hg(2) atom. In the third Br site, Br(3) is bonded in a single-bond geometry to one Hg(1) atom. is represented by the CIF file [CIF]
data_TlHg3Sb2Br3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.764
_cell_length_b   13.485
_cell_length_c   13.518
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1232.966
_cell_formula_units_Z   4
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  Tl0  1  0.998  0.750  0.758  1.0
  Tl  Tl1  1  0.002  0.750  0.258  1.0
  Tl  Tl2  1  0.998  0.250  0.742  1.0
  Tl  Tl3  1  0.002  0.250  0.242  1.0
  Hg  Hg4  1  0.467  0.000  0.750  1.0
  Hg  Hg5  1  0.536  0.750  0.013  1.0
  Hg  Hg6  1  0.467  0.500  0.750  1.0
  Hg  Hg7  1  0.533  0.000  0.250  1.0
  Hg  Hg8  1  0.464  0.250  0.987  1.0
  Hg  Hg9  1  0.000  0.500  0.000  1.0
  Hg  Hg10  1  0.000  0.500  0.500  1.0
  Hg  Hg11  1  0.536  0.250  0.487  1.0
  Hg  Hg12  1  0.464  0.750  0.513  1.0
  Hg  Hg13  1  0.533  0.500  0.250  1.0
  Hg  Hg14  1  0.000  0.000  0.000  1.0
  Hg  Hg15  1  0.000  0.000  0.500  1.0
  Sb  Sb16  1  0.372  0.944  0.560  1.0
  Sb  Sb17  1  0.628  0.944  0.060  1.0
  Sb  Sb18  1  0.372  0.556  0.560  1.0
  Sb  Sb19  1  0.628  0.556  0.060  1.0
  Sb  Sb20  1  0.372  0.444  0.940  1.0
  Sb  Sb21  1  0.372  0.056  0.940  1.0
  Sb  Sb22  1  0.628  0.444  0.440  1.0
  Sb  Sb23  1  0.628  0.056  0.440  1.0
  Br  Br24  1  0.533  0.750  0.797  1.0
  Br  Br25  1  0.533  0.250  0.703  1.0
  Br  Br26  1  0.897  0.250  0.991  1.0
  Br  Br27  1  0.899  0.000  0.750  1.0
  Br  Br28  1  0.467  0.750  0.297  1.0
  Br  Br29  1  0.899  0.500  0.750  1.0
  Br  Br30  1  0.103  0.750  0.009  1.0
  Br  Br31  1  0.101  0.500  0.250  1.0
  Br  Br32  1  0.897  0.750  0.509  1.0
  Br  Br33  1  0.101  0.000  0.250  1.0
  Br  Br34  1  0.103  0.250  0.491  1.0
  Br  Br35  1  0.467  0.250  0.203  1.0
[/CIF]
.
The structure described by Hg3TlSb2Br3 crystallizes in the orthorhombic Pbcm space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 3-coordinate geometry to two equivalent Sb(1) and one Br(3) atom. In the second Hg site, Hg(2) is bonded to two equivalent Sb(1), one Br(1), and one Br(2) atom to form distorted HgSb2Br2 trigonal pyramids that share corners with two equivalent Sb(1)Hg3Sb tetrahedra. In the third Hg site, Hg(3) is bonded in a linear geometry to two equivalent Sb(1) atoms. Tl(1) is bonded in a distorted single-bond geometry to one Br(1) atom. Sb(1) is bonded to one Hg(1), one Hg(2), one Hg(3), and one Sb(1) atom to form SbHg3Sb tetrahedra that share corners with three equivalent Sb(1)Hg3Sb tetrahedra and  a cornercorner with one Hg(2)Sb2Br2 trigonal pyramid. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a water-like geometry to one Hg(2) and one Tl(1) atom. In the second Br site, Br(2) is bonded in a distorted single-bond geometry to one Hg(2) atom. In the third Br site, Br(3) is bonded in a single-bond geometry to one Hg(1) atom. is represented by the CIF file [CIF]
data_TlHg3Sb2Br3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.764
_cell_length_b   13.485
_cell_length_c   13.518
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1232.966
_cell_formula_units_Z   4
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  Tl0  1  0.998  0.750  0.758  1.0
  Tl  Tl1  1  0.002  0.750  0.258  1.0
  Tl  Tl2  1  0.998  0.250  0.742  1.0
  Tl  Tl3  1  0.002  0.250  0.242  1.0
  Hg  Hg4  1  0.467  0.000  0.750  1.0
  Hg  Hg5  1  0.536  0.750  0.013  1.0
  Hg  Hg6  1  0.467  0.500  0.750  1.0
  Hg  Hg7  1  0.533  0.000  0.250  1.0
  Hg  Hg8  1  0.464  0.250  0.987  1.0
  Hg  Hg9  1  0.000  0.500  0.000  1.0
  Hg  Hg10  1  0.000  0.500  0.500  1.0
  Hg  Hg11  1  0.536  0.250  0.487  1.0
  Hg  Hg12  1  0.464  0.750  0.513  1.0
  Hg  Hg13  1  0.533  0.500  0.250  1.0
  Hg  Hg14  1  0.000  0.000  0.000  1.0
  Hg  Hg15  1  0.000  0.000  0.500  1.0
  Sb  Sb16  1  0.372  0.944  0.560  1.0
  Sb  Sb17  1  0.628  0.944  0.060  1.0
  Sb  Sb18  1  0.372  0.556  0.560  1.0
  Sb  Sb19  1  0.628  0.556  0.060  1.0
  Sb  Sb20  1  0.372  0.444  0.940  1.0
  Sb  Sb21  1  0.372  0.056  0.940  1.0
  Sb  Sb22  1  0.628  0.444  0.440  1.0
  Sb  Sb23  1  0.628  0.056  0.440  1.0
  Br  Br24  1  0.533  0.750  0.797  1.0
  Br  Br25  1  0.533  0.250  0.703  1.0
  Br  Br26  1  0.897  0.250  0.991  1.0
  Br  Br27  1  0.899  0.000  0.750  1.0
  Br  Br28  1  0.467  0.750  0.297  1.0
  Br  Br29  1  0.899  0.500  0.750  1.0
  Br  Br30  1  0.103  0.750  0.009  1.0
  Br  Br31  1  0.101  0.500  0.250  1.0
  Br  Br32  1  0.897  0.750  0.509  1.0
  Br  Br33  1  0.101  0.000  0.250  1.0
  Br  Br34  1  0.103  0.250  0.491  1.0
  Br  Br35  1  0.467  0.250  0.203  1.0
[/CIF]
.