The structure described by Y4BBr6 crystallizes in the monoclinic C2/c space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent B(1), one Br(1), one Br(4), one Br(5), and one Br(6) atom to form YB2Br4 octahedra that share  a cornercorner with one Y(3)B2Br4 octahedra,  a cornercorner with one Y(2)BBr5 octahedra,  an edgeedge with one Y(1)B2Br4 octahedra, edges with two equivalent Y(2)BBr5 octahedra, edges with two equivalent Y(4)BBr5 octahedra, and edges with three equivalent Y(3)B2Br4 octahedra. The corner-sharing octahedral tilt angles are 7°. In the second Y site, Y(2) is bonded to one B(1), one Br(1), one Br(5), one Br(6), and two equivalent Br(3) atoms to form YBBr5 octahedra that share  a cornercorner with one Y(1)B2Br4 octahedra,  a cornercorner with one Y(3)B2Br4 octahedra,  a cornercorner with one Y(4)BBr5 octahedra,  an edgeedge with one Y(2)BBr5 octahedra,  an edgeedge with one Y(4)BBr5 octahedra, edges with two equivalent Y(1)B2Br4 octahedra, and edges with two equivalent Y(3)B2Br4 octahedra. The corner-sharing octahedral tilt angles range from 5-13°. In the third Y site, Y(3) is bonded to two equivalent B(1), one Br(2), one Br(6), and two equivalent Br(5) atoms to form YB2Br4 octahedra that share  a cornercorner with one Y(1)B2Br4 octahedra,  a cornercorner with one Y(2)BBr5 octahedra, corners with two equivalent Y(4)BBr5 octahedra,  an edgeedge with one Y(4)BBr5 octahedra, edges with two equivalent Y(3)B2Br4 octahedra, edges with two equivalent Y(2)BBr5 octahedra, and edges with three equivalent Y(1)B2Br4 octahedra. The corner-sharing octahedral tilt angles range from 4-13°. In the fourth Y site, Y(4) is bonded to one B(1), one Br(3), two equivalent Br(2), and two equivalent Br(4) atoms to form YBBr5 octahedra that share  a cornercorner with one Y(2)BBr5 octahedra, corners with two equivalent Y(3)B2Br4 octahedra,  an edgeedge with one Y(3)B2Br4 octahedra,  an edgeedge with one Y(2)BBr5 octahedra, edges with two equivalent Y(1)B2Br4 octahedra, and edges with two equivalent Y(4)BBr5 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. B(1) is bonded to one Y(2), one Y(4), two equivalent Y(1), and two equivalent Y(3) atoms to form edge-sharing BY6 octahedra. There are six inequivalent Br sites. In the first Br site, Br(1) is bonded in an L-shaped geometry to one Y(1) and one Y(2) atom. In the second Br site, Br(2) is bonded in a T-shaped geometry to one Y(3) and two equivalent Y(4) atoms. In the third Br site, Br(3) is bonded in a T-shaped geometry to one Y(4) and two equivalent Y(2) atoms. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Y(1) and two equivalent Y(4) atoms. In the fifth Br site, Br(5) is bonded in a rectangular see-saw-like geometry to one Y(1), one Y(2), and two equivalent Y(3) atoms. In the sixth Br site, Br(6) is bonded in a distorted T-shaped geometry to one Y(1), one Y(2), and one Y(3) atom. is represented by the CIF card [CIF]
data_Y4BBr6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.630
_cell_length_b   10.630
_cell_length_c   12.588
_cell_angle_alpha   84.323
_cell_angle_beta   84.324
_cell_angle_gamma   63.635
_symmetry_Int_Tables_number   1
_cell_volume   1265.780
_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
  Y  Y0  1  0.713  0.470  0.192  1.0
  Y  Y1  1  0.530  0.287  0.308  1.0
  Y  Y2  1  0.287  0.530  0.808  1.0
  Y  Y3  1  0.470  0.713  0.692  1.0
  Y  Y4  1  0.786  0.545  0.454  1.0
  Y  Y5  1  0.455  0.214  0.046  1.0
  Y  Y6  1  0.214  0.455  0.546  1.0
  Y  Y7  1  0.545  0.786  0.954  1.0
  Y  Y8  1  0.581  0.358  0.589  1.0
  Y  Y9  1  0.642  0.419  0.911  1.0
  Y  Y10  1  0.419  0.642  0.411  1.0
  Y  Y11  1  0.358  0.581  0.089  1.0
  Y  Y12  1  0.114  0.813  0.605  1.0
  Y  Y13  1  0.187  0.886  0.895  1.0
  Y  Y14  1  0.886  0.187  0.395  1.0
  Y  Y15  1  0.813  0.114  0.105  1.0
  B  B16  1  0.662  0.412  0.395  1.0
  B  B17  1  0.588  0.338  0.105  1.0
  B  B18  1  0.338  0.588  0.605  1.0
  B  B19  1  0.412  0.662  0.895  1.0
  Br  Br20  1  0.141  0.376  0.749  1.0
  Br  Br21  1  0.624  0.859  0.751  1.0
  Br  Br22  1  0.859  0.624  0.251  1.0
  Br  Br23  1  0.376  0.141  0.249  1.0
  Br  Br24  1  0.158  0.915  0.395  1.0
  Br  Br25  1  0.085  0.842  0.105  1.0
  Br  Br26  1  0.842  0.085  0.605  1.0
  Br  Br27  1  0.915  0.158  0.895  1.0
  Br  Br28  1  0.055  0.307  0.467  1.0
  Br  Br29  1  0.693  0.944  0.033  1.0
  Br  Br30  1  0.944  0.693  0.533  1.0
  Br  Br31  1  0.307  0.056  0.967  1.0
  Br  Br32  1  0.988  0.225  0.180  1.0
  Br  Br33  1  0.775  0.012  0.320  1.0
  Br  Br34  1  0.012  0.775  0.820  1.0
  Br  Br35  1  0.225  0.988  0.680  1.0
  Br  Br36  1  0.470  0.750  0.184  1.0
  Br  Br37  1  0.250  0.530  0.315  1.0
  Br  Br38  1  0.530  0.250  0.816  1.0
  Br  Br39  1  0.750  0.470  0.685  1.0
  Br  Br40  1  0.809  0.547  0.974  1.0
  Br  Br41  1  0.453  0.191  0.526  1.0
  Br  Br42  1  0.191  0.453  0.026  1.0
  Br  Br43  1  0.547  0.809  0.474  1.0
[/CIF]
.
The structure described by Y4BBr6 crystallizes in the monoclinic C2/c space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent B(1), one Br(1), one Br(4), one Br(5), and one Br(6) atom to form YB2Br4 octahedra that share  a cornercorner with one Y(3)B2Br4 octahedra,  a cornercorner with one Y(2)BBr5 octahedra,  an edgeedge with one Y(1)B2Br4 octahedra, edges with two equivalent Y(2)BBr5 octahedra, edges with two equivalent Y(4)BBr5 octahedra, and edges with three equivalent Y(3)B2Br4 octahedra. The corner-sharing octahedral tilt angles are 7°. In the second Y site, Y(2) is bonded to one B(1), one Br(1), one Br(5), one Br(6), and two equivalent Br(3) atoms to form YBBr5 octahedra that share  a cornercorner with one Y(1)B2Br4 octahedra,  a cornercorner with one Y(3)B2Br4 octahedra,  a cornercorner with one Y(4)BBr5 octahedra,  an edgeedge with one Y(2)BBr5 octahedra,  an edgeedge with one Y(4)BBr5 octahedra, edges with two equivalent Y(1)B2Br4 octahedra, and edges with two equivalent Y(3)B2Br4 octahedra. The corner-sharing octahedral tilt angles range from 5-13°. In the third Y site, Y(3) is bonded to two equivalent B(1), one Br(2), one Br(6), and two equivalent Br(5) atoms to form YB2Br4 octahedra that share  a cornercorner with one Y(1)B2Br4 octahedra,  a cornercorner with one Y(2)BBr5 octahedra, corners with two equivalent Y(4)BBr5 octahedra,  an edgeedge with one Y(4)BBr5 octahedra, edges with two equivalent Y(3)B2Br4 octahedra, edges with two equivalent Y(2)BBr5 octahedra, and edges with three equivalent Y(1)B2Br4 octahedra. The corner-sharing octahedral tilt angles range from 4-13°. In the fourth Y site, Y(4) is bonded to one B(1), one Br(3), two equivalent Br(2), and two equivalent Br(4) atoms to form YBBr5 octahedra that share  a cornercorner with one Y(2)BBr5 octahedra, corners with two equivalent Y(3)B2Br4 octahedra,  an edgeedge with one Y(3)B2Br4 octahedra,  an edgeedge with one Y(2)BBr5 octahedra, edges with two equivalent Y(1)B2Br4 octahedra, and edges with two equivalent Y(4)BBr5 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. B(1) is bonded to one Y(2), one Y(4), two equivalent Y(1), and two equivalent Y(3) atoms to form edge-sharing BY6 octahedra. There are six inequivalent Br sites. In the first Br site, Br(1) is bonded in an L-shaped geometry to one Y(1) and one Y(2) atom. In the second Br site, Br(2) is bonded in a T-shaped geometry to one Y(3) and two equivalent Y(4) atoms. In the third Br site, Br(3) is bonded in a T-shaped geometry to one Y(4) and two equivalent Y(2) atoms. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Y(1) and two equivalent Y(4) atoms. In the fifth Br site, Br(5) is bonded in a rectangular see-saw-like geometry to one Y(1), one Y(2), and two equivalent Y(3) atoms. In the sixth Br site, Br(6) is bonded in a distorted T-shaped geometry to one Y(1), one Y(2), and one Y(3) atom. is represented by the CIF card [CIF]
data_Y4BBr6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.630
_cell_length_b   10.630
_cell_length_c   12.588
_cell_angle_alpha   84.323
_cell_angle_beta   84.324
_cell_angle_gamma   63.635
_symmetry_Int_Tables_number   1
_cell_volume   1265.780
_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
  Y  Y0  1  0.713  0.470  0.192  1.0
  Y  Y1  1  0.530  0.287  0.308  1.0
  Y  Y2  1  0.287  0.530  0.808  1.0
  Y  Y3  1  0.470  0.713  0.692  1.0
  Y  Y4  1  0.786  0.545  0.454  1.0
  Y  Y5  1  0.455  0.214  0.046  1.0
  Y  Y6  1  0.214  0.455  0.546  1.0
  Y  Y7  1  0.545  0.786  0.954  1.0
  Y  Y8  1  0.581  0.358  0.589  1.0
  Y  Y9  1  0.642  0.419  0.911  1.0
  Y  Y10  1  0.419  0.642  0.411  1.0
  Y  Y11  1  0.358  0.581  0.089  1.0
  Y  Y12  1  0.114  0.813  0.605  1.0
  Y  Y13  1  0.187  0.886  0.895  1.0
  Y  Y14  1  0.886  0.187  0.395  1.0
  Y  Y15  1  0.813  0.114  0.105  1.0
  B  B16  1  0.662  0.412  0.395  1.0
  B  B17  1  0.588  0.338  0.105  1.0
  B  B18  1  0.338  0.588  0.605  1.0
  B  B19  1  0.412  0.662  0.895  1.0
  Br  Br20  1  0.141  0.376  0.749  1.0
  Br  Br21  1  0.624  0.859  0.751  1.0
  Br  Br22  1  0.859  0.624  0.251  1.0
  Br  Br23  1  0.376  0.141  0.249  1.0
  Br  Br24  1  0.158  0.915  0.395  1.0
  Br  Br25  1  0.085  0.842  0.105  1.0
  Br  Br26  1  0.842  0.085  0.605  1.0
  Br  Br27  1  0.915  0.158  0.895  1.0
  Br  Br28  1  0.055  0.307  0.467  1.0
  Br  Br29  1  0.693  0.944  0.033  1.0
  Br  Br30  1  0.944  0.693  0.533  1.0
  Br  Br31  1  0.307  0.056  0.967  1.0
  Br  Br32  1  0.988  0.225  0.180  1.0
  Br  Br33  1  0.775  0.012  0.320  1.0
  Br  Br34  1  0.012  0.775  0.820  1.0
  Br  Br35  1  0.225  0.988  0.680  1.0
  Br  Br36  1  0.470  0.750  0.184  1.0
  Br  Br37  1  0.250  0.530  0.315  1.0
  Br  Br38  1  0.530  0.250  0.816  1.0
  Br  Br39  1  0.750  0.470  0.685  1.0
  Br  Br40  1  0.809  0.547  0.974  1.0
  Br  Br41  1  0.453  0.191  0.526  1.0
  Br  Br42  1  0.191  0.453  0.026  1.0
  Br  Br43  1  0.547  0.809  0.474  1.0
[/CIF]
.