The structure described by BaLaSb2Se6 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 9-coordinate geometry to one Se(1), one Se(2), one Se(4), two equivalent Se(3), two equivalent Se(5), and two equivalent Se(6) atoms. La(1) is bonded in a 9-coordinate geometry to one Se(2), one Se(6), two equivalent Se(3), two equivalent Se(5), and three equivalent Se(1) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one Se(3), two equivalent Se(2), and two equivalent Se(4) atoms to form distorted edge-sharing SbSe5 square pyramids. In the second Sb site, Sb(2) is bonded in a 6-coordinate geometry to one Se(2), one Se(5), two equivalent Se(4), and two equivalent Se(6) atoms. There are six inequivalent Se sites. In the first Se site, Se(5) is bonded to two equivalent Ba(1), two equivalent La(1), and one Sb(2) atom to form SeBa2La2Sb square pyramids that share  a cornercorner with one Se(2)BaLaSb3 trigonal bipyramid, corners with four equivalent Se(3)Ba2La2Sb trigonal bipyramids, edges with two equivalent Se(5)Ba2La2Sb square pyramids, edges with two equivalent Se(3)Ba2La2Sb trigonal bipyramids, and edges with two equivalent Se(2)BaLaSb3 trigonal bipyramids. In the second Se site, Se(6) is bonded in a 5-coordinate geometry to two equivalent Ba(1), one La(1), and two equivalent Sb(2) atoms. In the third Se site, Se(1) is bonded in a 5-coordinate geometry to one Ba(1), three equivalent La(1), and one Se(1) atom. In the fourth Se site, Se(2) is bonded to one Ba(1), one La(1), one Sb(2), and two equivalent Sb(1) atoms to form distorted SeBaLaSb3 trigonal bipyramids that share  a cornercorner with one Se(5)Ba2La2Sb square pyramid, corners with two equivalent Se(3)Ba2La2Sb trigonal bipyramids, corners with two equivalent Se(2)BaLaSb3 trigonal bipyramids, edges with two equivalent Se(5)Ba2La2Sb square pyramids, and edges with two equivalent Se(3)Ba2La2Sb trigonal bipyramids. In the fifth Se site, Se(3) is bonded to two equivalent Ba(1), two equivalent La(1), and one Sb(1) atom to form distorted SeBa2La2Sb trigonal bipyramids that share corners with four equivalent Se(5)Ba2La2Sb square pyramids, corners with two equivalent Se(2)BaLaSb3 trigonal bipyramids, edges with two equivalent Se(5)Ba2La2Sb square pyramids, edges with two equivalent Se(3)Ba2La2Sb trigonal bipyramids, and edges with two equivalent Se(2)BaLaSb3 trigonal bipyramids. In the sixth Se site, Se(4) is bonded in a 5-coordinate geometry to one Ba(1), two equivalent Sb(1), and two equivalent Sb(2) atoms. is represented by the CIF file [CIF]
data_BaLa(SbSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.461
_cell_length_b   4.430
_cell_length_c   17.102
_cell_angle_alpha   87.190
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1170.022
_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
  Ba  Ba0  1  0.291  0.739  0.672  1.0
  Ba  Ba1  1  0.791  0.261  0.828  1.0
  Ba  Ba2  1  0.709  0.261  0.328  1.0
  Ba  Ba3  1  0.209  0.739  0.172  1.0
  La  La4  1  0.127  0.706  0.907  1.0
  La  La5  1  0.627  0.294  0.593  1.0
  La  La6  1  0.873  0.294  0.093  1.0
  La  La7  1  0.373  0.706  0.407  1.0
  Sb  Sb8  1  0.370  0.296  0.973  1.0
  Sb  Sb9  1  0.870  0.704  0.527  1.0
  Sb  Sb10  1  0.630  0.704  0.027  1.0
  Sb  Sb11  1  0.130  0.296  0.473  1.0
  Sb  Sb12  1  0.027  0.269  0.697  1.0
  Sb  Sb13  1  0.527  0.731  0.803  1.0
  Sb  Sb14  1  0.973  0.731  0.303  1.0
  Sb  Sb15  1  0.473  0.269  0.197  1.0
  Se  Se16  1  0.987  0.174  0.942  1.0
  Se  Se17  1  0.487  0.826  0.558  1.0
  Se  Se18  1  0.013  0.826  0.058  1.0
  Se  Se19  1  0.513  0.174  0.442  1.0
  Se  Se20  1  0.329  0.751  0.872  1.0
  Se  Se21  1  0.829  0.249  0.628  1.0
  Se  Se22  1  0.671  0.249  0.128  1.0
  Se  Se23  1  0.171  0.751  0.372  1.0
  Se  Se24  1  0.207  0.233  0.022  1.0
  Se  Se25  1  0.707  0.767  0.478  1.0
  Se  Se26  1  0.793  0.767  0.978  1.0
  Se  Se27  1  0.293  0.233  0.522  1.0
  Se  Se28  1  0.587  0.301  0.911  1.0
  Se  Se29  1  0.087  0.699  0.589  1.0
  Se  Se30  1  0.413  0.699  0.089  1.0
  Se  Se31  1  0.913  0.301  0.411  1.0
  Se  Se32  1  0.174  0.222  0.780  1.0
  Se  Se33  1  0.674  0.778  0.720  1.0
  Se  Se34  1  0.826  0.778  0.220  1.0
  Se  Se35  1  0.326  0.222  0.280  1.0
  Se  Se36  1  0.968  0.672  0.795  1.0
  Se  Se37  1  0.468  0.328  0.705  1.0
  Se  Se38  1  0.032  0.328  0.205  1.0
  Se  Se39  1  0.532  0.672  0.295  1.0
[/CIF]
.
The structure described by BaLaSb2Se6 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 9-coordinate geometry to one Se(1), one Se(2), one Se(4), two equivalent Se(3), two equivalent Se(5), and two equivalent Se(6) atoms. La(1) is bonded in a 9-coordinate geometry to one Se(2), one Se(6), two equivalent Se(3), two equivalent Se(5), and three equivalent Se(1) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one Se(3), two equivalent Se(2), and two equivalent Se(4) atoms to form distorted edge-sharing SbSe5 square pyramids. In the second Sb site, Sb(2) is bonded in a 6-coordinate geometry to one Se(2), one Se(5), two equivalent Se(4), and two equivalent Se(6) atoms. There are six inequivalent Se sites. In the first Se site, Se(5) is bonded to two equivalent Ba(1), two equivalent La(1), and one Sb(2) atom to form SeBa2La2Sb square pyramids that share  a cornercorner with one Se(2)BaLaSb3 trigonal bipyramid, corners with four equivalent Se(3)Ba2La2Sb trigonal bipyramids, edges with two equivalent Se(5)Ba2La2Sb square pyramids, edges with two equivalent Se(3)Ba2La2Sb trigonal bipyramids, and edges with two equivalent Se(2)BaLaSb3 trigonal bipyramids. In the second Se site, Se(6) is bonded in a 5-coordinate geometry to two equivalent Ba(1), one La(1), and two equivalent Sb(2) atoms. In the third Se site, Se(1) is bonded in a 5-coordinate geometry to one Ba(1), three equivalent La(1), and one Se(1) atom. In the fourth Se site, Se(2) is bonded to one Ba(1), one La(1), one Sb(2), and two equivalent Sb(1) atoms to form distorted SeBaLaSb3 trigonal bipyramids that share  a cornercorner with one Se(5)Ba2La2Sb square pyramid, corners with two equivalent Se(3)Ba2La2Sb trigonal bipyramids, corners with two equivalent Se(2)BaLaSb3 trigonal bipyramids, edges with two equivalent Se(5)Ba2La2Sb square pyramids, and edges with two equivalent Se(3)Ba2La2Sb trigonal bipyramids. In the fifth Se site, Se(3) is bonded to two equivalent Ba(1), two equivalent La(1), and one Sb(1) atom to form distorted SeBa2La2Sb trigonal bipyramids that share corners with four equivalent Se(5)Ba2La2Sb square pyramids, corners with two equivalent Se(2)BaLaSb3 trigonal bipyramids, edges with two equivalent Se(5)Ba2La2Sb square pyramids, edges with two equivalent Se(3)Ba2La2Sb trigonal bipyramids, and edges with two equivalent Se(2)BaLaSb3 trigonal bipyramids. In the sixth Se site, Se(4) is bonded in a 5-coordinate geometry to one Ba(1), two equivalent Sb(1), and two equivalent Sb(2) atoms. is represented by the CIF file [CIF]
data_BaLa(SbSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.461
_cell_length_b   4.430
_cell_length_c   17.102
_cell_angle_alpha   87.190
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1170.022
_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
  Ba  Ba0  1  0.291  0.739  0.672  1.0
  Ba  Ba1  1  0.791  0.261  0.828  1.0
  Ba  Ba2  1  0.709  0.261  0.328  1.0
  Ba  Ba3  1  0.209  0.739  0.172  1.0
  La  La4  1  0.127  0.706  0.907  1.0
  La  La5  1  0.627  0.294  0.593  1.0
  La  La6  1  0.873  0.294  0.093  1.0
  La  La7  1  0.373  0.706  0.407  1.0
  Sb  Sb8  1  0.370  0.296  0.973  1.0
  Sb  Sb9  1  0.870  0.704  0.527  1.0
  Sb  Sb10  1  0.630  0.704  0.027  1.0
  Sb  Sb11  1  0.130  0.296  0.473  1.0
  Sb  Sb12  1  0.027  0.269  0.697  1.0
  Sb  Sb13  1  0.527  0.731  0.803  1.0
  Sb  Sb14  1  0.973  0.731  0.303  1.0
  Sb  Sb15  1  0.473  0.269  0.197  1.0
  Se  Se16  1  0.987  0.174  0.942  1.0
  Se  Se17  1  0.487  0.826  0.558  1.0
  Se  Se18  1  0.013  0.826  0.058  1.0
  Se  Se19  1  0.513  0.174  0.442  1.0
  Se  Se20  1  0.329  0.751  0.872  1.0
  Se  Se21  1  0.829  0.249  0.628  1.0
  Se  Se22  1  0.671  0.249  0.128  1.0
  Se  Se23  1  0.171  0.751  0.372  1.0
  Se  Se24  1  0.207  0.233  0.022  1.0
  Se  Se25  1  0.707  0.767  0.478  1.0
  Se  Se26  1  0.793  0.767  0.978  1.0
  Se  Se27  1  0.293  0.233  0.522  1.0
  Se  Se28  1  0.587  0.301  0.911  1.0
  Se  Se29  1  0.087  0.699  0.589  1.0
  Se  Se30  1  0.413  0.699  0.089  1.0
  Se  Se31  1  0.913  0.301  0.411  1.0
  Se  Se32  1  0.174  0.222  0.780  1.0
  Se  Se33  1  0.674  0.778  0.720  1.0
  Se  Se34  1  0.826  0.778  0.220  1.0
  Se  Se35  1  0.326  0.222  0.280  1.0
  Se  Se36  1  0.968  0.672  0.795  1.0
  Se  Se37  1  0.468  0.328  0.705  1.0
  Se  Se38  1  0.032  0.328  0.205  1.0
  Se  Se39  1  0.532  0.672  0.295  1.0
[/CIF]
.