The material structure described by La10Al5Br4 crystallizes in the tetragonal I4/mcm space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one Al(2), four equivalent Al(1), and one Br(2) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to three equivalent Al(1), two equivalent Br(2), and three equivalent Br(1) atoms. In the third La site, La(3) is bonded to two equivalent Al(2) and three equivalent Al(1) atoms to form a mixture of distorted corner and edge-sharing LaAl5 trigonal bipyramids. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent La(1), three equivalent La(2), three equivalent La(3), and one Al(1) atom. In the second Al site, Al(2) is bonded in a distorted q6 geometry to two equivalent La(1) and eight equivalent La(3) atoms. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 6-coordinate geometry to six equivalent La(2) atoms. In the second Br site, Br(2) is bonded to one La(1) and four equivalent La(2) atoms to form corner-sharing BrLa5 square pyramids. is represented by the CIF card [CIF]
data_La10Al5Br4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   17.679
_cell_length_b   17.679
_cell_length_c   17.679
_cell_angle_alpha   152.918
_cell_angle_beta   152.918
_cell_angle_gamma   38.675
_symmetry_Int_Tables_number   1
_cell_volume   1143.440
_cell_formula_units_Z   2
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  La0  1  0.652  0.652  0.000  1.0
  La  La1  1  0.600  0.100  0.844  1.0
  La  La2  1  0.035  0.872  0.500  1.0
  La  La3  1  0.372  0.535  0.500  1.0
  La  La4  1  0.400  0.900  0.156  1.0
  La  La5  1  0.743  0.243  0.844  1.0
  La  La6  1  0.965  0.128  0.500  1.0
  La  La7  1  0.872  0.372  0.837  1.0
  La  La8  1  0.465  0.965  0.837  1.0
  La  La9  1  0.348  0.348  0.000  1.0
  La  La10  1  0.100  0.257  0.500  1.0
  La  La11  1  0.257  0.757  0.156  1.0
  La  La12  1  0.757  0.600  0.500  1.0
  La  La13  1  0.128  0.628  0.163  1.0
  La  La14  1  0.152  0.152  0.000  1.0
  La  La15  1  0.848  0.848  0.000  1.0
  La  La16  1  0.243  0.400  0.500  1.0
  La  La17  1  0.535  0.035  0.163  1.0
  La  La18  1  0.628  0.465  0.500  1.0
  La  La19  1  0.900  0.743  0.500  1.0
  Al  Al20  1  0.254  0.754  0.738  1.0
  Al  Al21  1  0.484  0.746  0.500  1.0
  Al  Al22  1  0.516  0.254  0.500  1.0
  Al  Al23  1  0.246  0.984  0.500  1.0
  Al  Al24  1  0.750  0.750  0.000  1.0
  Al  Al25  1  0.746  0.246  0.262  1.0
  Al  Al26  1  0.754  0.016  0.500  1.0
  Al  Al27  1  0.016  0.516  0.262  1.0
  Al  Al28  1  0.984  0.484  0.738  1.0
  Al  Al29  1  0.250  0.250  0.000  1.0
  Br  Br30  1  0.142  0.642  0.784  1.0
  Br  Br31  1  0.358  0.142  0.500  1.0
  Br  Br32  1  0.642  0.858  0.500  1.0
  Br  Br33  1  0.444  0.444  0.000  1.0
  Br  Br34  1  0.944  0.944  0.000  1.0
  Br  Br35  1  0.556  0.556  0.000  1.0
  Br  Br36  1  0.056  0.056  0.000  1.0
  Br  Br37  1  0.858  0.358  0.216  1.0
[/CIF]
.
The material structure described by La10Al5Br4 crystallizes in the tetragonal I4/mcm space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one Al(2), four equivalent Al(1), and one Br(2) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to three equivalent Al(1), two equivalent Br(2), and three equivalent Br(1) atoms. In the third La site, La(3) is bonded to two equivalent Al(2) and three equivalent Al(1) atoms to form a mixture of distorted corner and edge-sharing LaAl5 trigonal bipyramids. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent La(1), three equivalent La(2), three equivalent La(3), and one Al(1) atom. In the second Al site, Al(2) is bonded in a distorted q6 geometry to two equivalent La(1) and eight equivalent La(3) atoms. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 6-coordinate geometry to six equivalent La(2) atoms. In the second Br site, Br(2) is bonded to one La(1) and four equivalent La(2) atoms to form corner-sharing BrLa5 square pyramids. is represented by the CIF card [CIF]
data_La10Al5Br4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   17.679
_cell_length_b   17.679
_cell_length_c   17.679
_cell_angle_alpha   152.918
_cell_angle_beta   152.918
_cell_angle_gamma   38.675
_symmetry_Int_Tables_number   1
_cell_volume   1143.440
_cell_formula_units_Z   2
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  La0  1  0.652  0.652  0.000  1.0
  La  La1  1  0.600  0.100  0.844  1.0
  La  La2  1  0.035  0.872  0.500  1.0
  La  La3  1  0.372  0.535  0.500  1.0
  La  La4  1  0.400  0.900  0.156  1.0
  La  La5  1  0.743  0.243  0.844  1.0
  La  La6  1  0.965  0.128  0.500  1.0
  La  La7  1  0.872  0.372  0.837  1.0
  La  La8  1  0.465  0.965  0.837  1.0
  La  La9  1  0.348  0.348  0.000  1.0
  La  La10  1  0.100  0.257  0.500  1.0
  La  La11  1  0.257  0.757  0.156  1.0
  La  La12  1  0.757  0.600  0.500  1.0
  La  La13  1  0.128  0.628  0.163  1.0
  La  La14  1  0.152  0.152  0.000  1.0
  La  La15  1  0.848  0.848  0.000  1.0
  La  La16  1  0.243  0.400  0.500  1.0
  La  La17  1  0.535  0.035  0.163  1.0
  La  La18  1  0.628  0.465  0.500  1.0
  La  La19  1  0.900  0.743  0.500  1.0
  Al  Al20  1  0.254  0.754  0.738  1.0
  Al  Al21  1  0.484  0.746  0.500  1.0
  Al  Al22  1  0.516  0.254  0.500  1.0
  Al  Al23  1  0.246  0.984  0.500  1.0
  Al  Al24  1  0.750  0.750  0.000  1.0
  Al  Al25  1  0.746  0.246  0.262  1.0
  Al  Al26  1  0.754  0.016  0.500  1.0
  Al  Al27  1  0.016  0.516  0.262  1.0
  Al  Al28  1  0.984  0.484  0.738  1.0
  Al  Al29  1  0.250  0.250  0.000  1.0
  Br  Br30  1  0.142  0.642  0.784  1.0
  Br  Br31  1  0.358  0.142  0.500  1.0
  Br  Br32  1  0.642  0.858  0.500  1.0
  Br  Br33  1  0.444  0.444  0.000  1.0
  Br  Br34  1  0.944  0.944  0.000  1.0
  Br  Br35  1  0.556  0.556  0.000  1.0
  Br  Br36  1  0.056  0.056  0.000  1.0
  Br  Br37  1  0.858  0.358  0.216  1.0
[/CIF]
.