The material structure described by Rb2LaBr5 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. La(1) is bonded to one Br(1), one Br(3), one Br(4), and four equivalent Br(2) atoms to form distorted edge-sharing LaBr7 pentagonal bipyramids. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded to four equivalent Rb(1) and one La(1) atom to form distorted BrRb4La trigonal bipyramids that share  a cornercorner with one Br(4)Rb4La trigonal bipyramid, corners with four equivalent Br(1)Rb4La trigonal bipyramids, corners with five equivalent Br(3)Rb4La trigonal bipyramids, corners with four equivalent Br(2)Rb2La2 trigonal pyramids, edges with two equivalent Br(3)Rb4La trigonal bipyramids, edges with four equivalent Br(4)Rb4La trigonal bipyramids, and edges with four equivalent Br(2)Rb2La2 trigonal pyramids. In the second Br site, Br(2) is bonded to two equivalent Rb(1) and two equivalent La(1) atoms to form distorted BrRb2La2 trigonal pyramids that share corners with two equivalent Br(1)Rb4La trigonal bipyramids, corners with two equivalent Br(4)Rb4La trigonal bipyramids, corners with four equivalent Br(3)Rb4La trigonal bipyramids, corners with six equivalent Br(2)Rb2La2 trigonal pyramids,  an edgeedge with one Br(3)Rb4La trigonal bipyramid, edges with two equivalent Br(1)Rb4La trigonal bipyramids, edges with two equivalent Br(4)Rb4La trigonal bipyramids, and  an edgeedge with one Br(2)Rb2La2 trigonal pyramid. In the third Br site, Br(3) is bonded to four equivalent Rb(1) and one La(1) atom to form distorted BrRb4La trigonal bipyramids that share corners with four equivalent Br(4)Rb4La trigonal bipyramids, corners with five equivalent Br(1)Rb4La trigonal bipyramids, corners with eight equivalent Br(2)Rb2La2 trigonal pyramids,  an edgeedge with one Br(4)Rb4La trigonal bipyramid, edges with two equivalent Br(1)Rb4La trigonal bipyramids, edges with two equivalent Br(3)Rb4La trigonal bipyramids, edges with two equivalent Br(2)Rb2La2 trigonal pyramids, and  a faceface with one Br(4)Rb4La trigonal bipyramid. In the fourth Br site, Br(4) is bonded to four equivalent Rb(1) and one La(1) atom to form distorted BrRb4La trigonal bipyramids that share  a cornercorner with one Br(1)Rb4La trigonal bipyramid, corners with four equivalent Br(3)Rb4La trigonal bipyramids, corners with four equivalent Br(4)Rb4La trigonal bipyramids, corners with four equivalent Br(2)Rb2La2 trigonal pyramids,  an edgeedge with one Br(3)Rb4La trigonal bipyramid, edges with four equivalent Br(1)Rb4La trigonal bipyramids, edges with four equivalent Br(2)Rb2La2 trigonal pyramids, and  a faceface with one Br(3)Rb4La trigonal bipyramid. is represented by the CIF file [CIF]
data_Rb2LaBr5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.693
_cell_length_b   9.468
_cell_length_c   13.863
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1140.939
_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
  Rb  Rb0  1  0.946  0.004  0.828  1.0
  Rb  Rb1  1  0.054  0.996  0.172  1.0
  Rb  Rb2  1  0.446  0.996  0.672  1.0
  Rb  Rb3  1  0.054  0.504  0.172  1.0
  Rb  Rb4  1  0.554  0.004  0.328  1.0
  Rb  Rb5  1  0.946  0.496  0.828  1.0
  Rb  Rb6  1  0.554  0.496  0.328  1.0
  Rb  Rb7  1  0.446  0.504  0.672  1.0
  La  La8  1  0.925  0.750  0.505  1.0
  La  La9  1  0.075  0.250  0.495  1.0
  La  La10  1  0.425  0.250  0.995  1.0
  La  La11  1  0.575  0.750  0.005  1.0
  Br  Br12  1  0.127  0.750  0.679  1.0
  Br  Br13  1  0.873  0.250  0.321  1.0
  Br  Br14  1  0.627  0.250  0.821  1.0
  Br  Br15  1  0.373  0.750  0.179  1.0
  Br  Br16  1  0.835  0.044  0.576  1.0
  Br  Br17  1  0.165  0.956  0.424  1.0
  Br  Br18  1  0.335  0.956  0.924  1.0
  Br  Br19  1  0.165  0.544  0.424  1.0
  Br  Br20  1  0.665  0.044  0.076  1.0
  Br  Br21  1  0.835  0.456  0.576  1.0
  Br  Br22  1  0.665  0.456  0.076  1.0
  Br  Br23  1  0.335  0.544  0.924  1.0
  Br  Br24  1  0.580  0.750  0.509  1.0
  Br  Br25  1  0.420  0.250  0.491  1.0
  Br  Br26  1  0.080  0.250  0.991  1.0
  Br  Br27  1  0.920  0.750  0.009  1.0
  Br  Br28  1  0.661  0.750  0.797  1.0
  Br  Br29  1  0.339  0.250  0.203  1.0
  Br  Br30  1  0.161  0.250  0.703  1.0
  Br  Br31  1  0.839  0.750  0.297  1.0
[/CIF]
.
The material structure described by Rb2LaBr5 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. La(1) is bonded to one Br(1), one Br(3), one Br(4), and four equivalent Br(2) atoms to form distorted edge-sharing LaBr7 pentagonal bipyramids. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded to four equivalent Rb(1) and one La(1) atom to form distorted BrRb4La trigonal bipyramids that share  a cornercorner with one Br(4)Rb4La trigonal bipyramid, corners with four equivalent Br(1)Rb4La trigonal bipyramids, corners with five equivalent Br(3)Rb4La trigonal bipyramids, corners with four equivalent Br(2)Rb2La2 trigonal pyramids, edges with two equivalent Br(3)Rb4La trigonal bipyramids, edges with four equivalent Br(4)Rb4La trigonal bipyramids, and edges with four equivalent Br(2)Rb2La2 trigonal pyramids. In the second Br site, Br(2) is bonded to two equivalent Rb(1) and two equivalent La(1) atoms to form distorted BrRb2La2 trigonal pyramids that share corners with two equivalent Br(1)Rb4La trigonal bipyramids, corners with two equivalent Br(4)Rb4La trigonal bipyramids, corners with four equivalent Br(3)Rb4La trigonal bipyramids, corners with six equivalent Br(2)Rb2La2 trigonal pyramids,  an edgeedge with one Br(3)Rb4La trigonal bipyramid, edges with two equivalent Br(1)Rb4La trigonal bipyramids, edges with two equivalent Br(4)Rb4La trigonal bipyramids, and  an edgeedge with one Br(2)Rb2La2 trigonal pyramid. In the third Br site, Br(3) is bonded to four equivalent Rb(1) and one La(1) atom to form distorted BrRb4La trigonal bipyramids that share corners with four equivalent Br(4)Rb4La trigonal bipyramids, corners with five equivalent Br(1)Rb4La trigonal bipyramids, corners with eight equivalent Br(2)Rb2La2 trigonal pyramids,  an edgeedge with one Br(4)Rb4La trigonal bipyramid, edges with two equivalent Br(1)Rb4La trigonal bipyramids, edges with two equivalent Br(3)Rb4La trigonal bipyramids, edges with two equivalent Br(2)Rb2La2 trigonal pyramids, and  a faceface with one Br(4)Rb4La trigonal bipyramid. In the fourth Br site, Br(4) is bonded to four equivalent Rb(1) and one La(1) atom to form distorted BrRb4La trigonal bipyramids that share  a cornercorner with one Br(1)Rb4La trigonal bipyramid, corners with four equivalent Br(3)Rb4La trigonal bipyramids, corners with four equivalent Br(4)Rb4La trigonal bipyramids, corners with four equivalent Br(2)Rb2La2 trigonal pyramids,  an edgeedge with one Br(3)Rb4La trigonal bipyramid, edges with four equivalent Br(1)Rb4La trigonal bipyramids, edges with four equivalent Br(2)Rb2La2 trigonal pyramids, and  a faceface with one Br(3)Rb4La trigonal bipyramid. is represented by the CIF file [CIF]
data_Rb2LaBr5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.693
_cell_length_b   9.468
_cell_length_c   13.863
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1140.939
_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
  Rb  Rb0  1  0.946  0.004  0.828  1.0
  Rb  Rb1  1  0.054  0.996  0.172  1.0
  Rb  Rb2  1  0.446  0.996  0.672  1.0
  Rb  Rb3  1  0.054  0.504  0.172  1.0
  Rb  Rb4  1  0.554  0.004  0.328  1.0
  Rb  Rb5  1  0.946  0.496  0.828  1.0
  Rb  Rb6  1  0.554  0.496  0.328  1.0
  Rb  Rb7  1  0.446  0.504  0.672  1.0
  La  La8  1  0.925  0.750  0.505  1.0
  La  La9  1  0.075  0.250  0.495  1.0
  La  La10  1  0.425  0.250  0.995  1.0
  La  La11  1  0.575  0.750  0.005  1.0
  Br  Br12  1  0.127  0.750  0.679  1.0
  Br  Br13  1  0.873  0.250  0.321  1.0
  Br  Br14  1  0.627  0.250  0.821  1.0
  Br  Br15  1  0.373  0.750  0.179  1.0
  Br  Br16  1  0.835  0.044  0.576  1.0
  Br  Br17  1  0.165  0.956  0.424  1.0
  Br  Br18  1  0.335  0.956  0.924  1.0
  Br  Br19  1  0.165  0.544  0.424  1.0
  Br  Br20  1  0.665  0.044  0.076  1.0
  Br  Br21  1  0.835  0.456  0.576  1.0
  Br  Br22  1  0.665  0.456  0.076  1.0
  Br  Br23  1  0.335  0.544  0.924  1.0
  Br  Br24  1  0.580  0.750  0.509  1.0
  Br  Br25  1  0.420  0.250  0.491  1.0
  Br  Br26  1  0.080  0.250  0.991  1.0
  Br  Br27  1  0.920  0.750  0.009  1.0
  Br  Br28  1  0.661  0.750  0.797  1.0
  Br  Br29  1  0.339  0.250  0.203  1.0
  Br  Br30  1  0.161  0.250  0.703  1.0
  Br  Br31  1  0.839  0.750  0.297  1.0
[/CIF]
.