The material structure described by Rb4Pb9 is Magnesium tetraboride-like structured and crystallizes in the monoclinic P2_1/m space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one Pb(11), one Pb(2), one Pb(7), two equivalent Pb(10), and two equivalent Pb(3) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Pb(1), one Pb(10), one Pb(3), one Pb(4), one Pb(5), one Pb(6), one Pb(8), and one Pb(9) atom. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one Pb(1), one Pb(10), one Pb(12), one Pb(5), one Pb(6), one Pb(7), one Pb(8), and one Pb(9) atom. In the fourth Rb site, Rb(4) is bonded in a 7-coordinate geometry to one Pb(12), two equivalent Pb(1), two equivalent Pb(10), two equivalent Pb(8), and two equivalent Pb(9) atoms. In the fifth Rb site, Rb(5) is bonded in a 8-coordinate geometry to one Pb(1), one Pb(11), one Pb(2), one Pb(4), one Pb(6), one Pb(7), and two equivalent Pb(3) atoms. There are twelve inequivalent Pb sites. In the first Pb site, Pb(10) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Pb(10), one Pb(2), one Pb(8), and one Pb(9) atom. In the second Pb site, Pb(11) is bonded in a 8-coordinate geometry to one Rb(1), two equivalent Rb(5), one Pb(5), two equivalent Pb(3), and two equivalent Pb(6) atoms. In the third Pb site, Pb(12) is bonded in a 8-coordinate geometry to one Rb(4), two equivalent Rb(3), one Pb(7), two equivalent Pb(8), and two equivalent Pb(9) atoms. In the fourth Pb site, Pb(1) is bonded in a 8-coordinate geometry to one Rb(2), one Rb(3), one Rb(4), one Rb(5), one Pb(1), one Pb(4), one Pb(5), and one Pb(6) atom. In the fifth Pb site, Pb(2) is bonded in a 8-coordinate geometry to one Rb(1), two equivalent Rb(5), one Pb(7), two equivalent Pb(10), and two equivalent Pb(9) atoms. In the sixth Pb site, Pb(3) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), two equivalent Rb(5), one Pb(11), one Pb(3), one Pb(4), and one Pb(6) atom. In the seventh Pb site, Pb(4) is bonded in a distorted body-centered cubic geometry to two equivalent Rb(2), two equivalent Rb(5), two equivalent Pb(1), and two equivalent Pb(3) atoms. In the eighth Pb site, Pb(5) is bonded in a 9-coordinate geometry to two equivalent Rb(2), two equivalent Rb(3), one Pb(11), two equivalent Pb(1), and two equivalent Pb(6) atoms. In the ninth Pb site, Pb(6) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(5), one Pb(1), one Pb(11), one Pb(3), and one Pb(5) atom. In the tenth Pb site, Pb(7) is bonded in a 9-coordinate geometry to one Rb(1), two equivalent Rb(3), two equivalent Rb(5), one Pb(12), one Pb(2), and two equivalent Pb(9) atoms. In the eleventh Pb site, Pb(8) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(4), one Pb(10), one Pb(12), one Pb(8), and one Pb(9) atom. In the twelfth Pb site, Pb(9) is bonded in a 8-coordinate geometry to one Rb(2), one Rb(3), one Rb(4), one Pb(10), one Pb(12), one Pb(2), one Pb(7), and one Pb(8) atom. is represented by the CIF card [CIF]
data_Rb4Pb9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.934
_cell_length_b   13.495
_cell_length_c   16.405
_cell_angle_alpha   90.000
_cell_angle_beta   103.005
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   2142.780
_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
  Rb  Rb0  1  0.121  0.250  0.206  1.0
  Rb  Rb1  1  0.619  0.075  0.785  1.0
  Rb  Rb2  1  0.381  0.925  0.215  1.0
  Rb  Rb3  1  0.950  0.501  0.632  1.0
  Rb  Rb4  1  0.050  0.001  0.368  1.0
  Rb  Rb5  1  0.950  0.999  0.632  1.0
  Rb  Rb6  1  0.619  0.425  0.785  1.0
  Rb  Rb7  1  0.737  0.750  0.433  1.0
  Rb  Rb8  1  0.324  0.599  0.908  1.0
  Rb  Rb9  1  0.263  0.250  0.567  1.0
  Rb  Rb10  1  0.381  0.575  0.215  1.0
  Rb  Rb11  1  0.324  0.901  0.908  1.0
  Rb  Rb12  1  0.676  0.401  0.092  1.0
  Rb  Rb13  1  0.050  0.499  0.368  1.0
  Rb  Rb14  1  0.879  0.750  0.794  1.0
  Rb  Rb15  1  0.676  0.099  0.092  1.0
  Pb  Pb16  1  0.769  0.865  0.217  1.0
  Pb  Pb17  1  0.506  0.250  0.246  1.0
  Pb  Pb18  1  0.759  0.865  0.977  1.0
  Pb  Pb19  1  0.570  0.750  0.074  1.0
  Pb  Pb20  1  0.241  0.135  0.023  1.0
  Pb  Pb21  1  0.941  0.250  0.757  1.0
  Pb  Pb22  1  0.004  0.062  0.876  1.0
  Pb  Pb23  1  0.823  0.250  0.310  1.0
  Pb  Pb24  1  0.387  0.633  0.455  1.0
  Pb  Pb25  1  0.689  0.067  0.376  1.0
  Pb  Pb26  1  0.759  0.635  0.977  1.0
  Pb  Pb27  1  0.430  0.250  0.926  1.0
  Pb  Pb28  1  0.996  0.562  0.124  1.0
  Pb  Pb29  1  0.613  0.133  0.545  1.0
  Pb  Pb30  1  0.231  0.135  0.783  1.0
  Pb  Pb31  1  0.996  0.938  0.124  1.0
  Pb  Pb32  1  0.241  0.365  0.023  1.0
  Pb  Pb33  1  0.004  0.438  0.876  1.0
  Pb  Pb34  1  0.610  0.632  0.621  1.0
  Pb  Pb35  1  0.059  0.750  0.243  1.0
  Pb  Pb36  1  0.769  0.635  0.217  1.0
  Pb  Pb37  1  0.390  0.132  0.379  1.0
  Pb  Pb38  1  0.387  0.867  0.455  1.0
  Pb  Pb39  1  0.311  0.933  0.624  1.0
  Pb  Pb40  1  0.613  0.367  0.545  1.0
  Pb  Pb41  1  0.943  0.250  0.970  1.0
  Pb  Pb42  1  0.177  0.750  0.690  1.0
  Pb  Pb43  1  0.494  0.750  0.754  1.0
  Pb  Pb44  1  0.139  0.750  0.498  1.0
  Pb  Pb45  1  0.861  0.250  0.502  1.0
  Pb  Pb46  1  0.610  0.868  0.621  1.0
  Pb  Pb47  1  0.231  0.365  0.783  1.0
  Pb  Pb48  1  0.390  0.368  0.379  1.0
  Pb  Pb49  1  0.311  0.567  0.624  1.0
  Pb  Pb50  1  0.057  0.750  0.030  1.0
  Pb  Pb51  1  0.689  0.433  0.376  1.0
[/CIF]
.
The material structure described by Rb4Pb9 is Magnesium tetraboride-like structured and crystallizes in the monoclinic P2_1/m space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one Pb(11), one Pb(2), one Pb(7), two equivalent Pb(10), and two equivalent Pb(3) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Pb(1), one Pb(10), one Pb(3), one Pb(4), one Pb(5), one Pb(6), one Pb(8), and one Pb(9) atom. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one Pb(1), one Pb(10), one Pb(12), one Pb(5), one Pb(6), one Pb(7), one Pb(8), and one Pb(9) atom. In the fourth Rb site, Rb(4) is bonded in a 7-coordinate geometry to one Pb(12), two equivalent Pb(1), two equivalent Pb(10), two equivalent Pb(8), and two equivalent Pb(9) atoms. In the fifth Rb site, Rb(5) is bonded in a 8-coordinate geometry to one Pb(1), one Pb(11), one Pb(2), one Pb(4), one Pb(6), one Pb(7), and two equivalent Pb(3) atoms. There are twelve inequivalent Pb sites. In the first Pb site, Pb(10) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Pb(10), one Pb(2), one Pb(8), and one Pb(9) atom. In the second Pb site, Pb(11) is bonded in a 8-coordinate geometry to one Rb(1), two equivalent Rb(5), one Pb(5), two equivalent Pb(3), and two equivalent Pb(6) atoms. In the third Pb site, Pb(12) is bonded in a 8-coordinate geometry to one Rb(4), two equivalent Rb(3), one Pb(7), two equivalent Pb(8), and two equivalent Pb(9) atoms. In the fourth Pb site, Pb(1) is bonded in a 8-coordinate geometry to one Rb(2), one Rb(3), one Rb(4), one Rb(5), one Pb(1), one Pb(4), one Pb(5), and one Pb(6) atom. In the fifth Pb site, Pb(2) is bonded in a 8-coordinate geometry to one Rb(1), two equivalent Rb(5), one Pb(7), two equivalent Pb(10), and two equivalent Pb(9) atoms. In the sixth Pb site, Pb(3) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), two equivalent Rb(5), one Pb(11), one Pb(3), one Pb(4), and one Pb(6) atom. In the seventh Pb site, Pb(4) is bonded in a distorted body-centered cubic geometry to two equivalent Rb(2), two equivalent Rb(5), two equivalent Pb(1), and two equivalent Pb(3) atoms. In the eighth Pb site, Pb(5) is bonded in a 9-coordinate geometry to two equivalent Rb(2), two equivalent Rb(3), one Pb(11), two equivalent Pb(1), and two equivalent Pb(6) atoms. In the ninth Pb site, Pb(6) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(5), one Pb(1), one Pb(11), one Pb(3), and one Pb(5) atom. In the tenth Pb site, Pb(7) is bonded in a 9-coordinate geometry to one Rb(1), two equivalent Rb(3), two equivalent Rb(5), one Pb(12), one Pb(2), and two equivalent Pb(9) atoms. In the eleventh Pb site, Pb(8) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(4), one Pb(10), one Pb(12), one Pb(8), and one Pb(9) atom. In the twelfth Pb site, Pb(9) is bonded in a 8-coordinate geometry to one Rb(2), one Rb(3), one Rb(4), one Pb(10), one Pb(12), one Pb(2), one Pb(7), and one Pb(8) atom. is represented by the CIF card [CIF]
data_Rb4Pb9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.934
_cell_length_b   13.495
_cell_length_c   16.405
_cell_angle_alpha   90.000
_cell_angle_beta   103.005
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   2142.780
_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
  Rb  Rb0  1  0.121  0.250  0.206  1.0
  Rb  Rb1  1  0.619  0.075  0.785  1.0
  Rb  Rb2  1  0.381  0.925  0.215  1.0
  Rb  Rb3  1  0.950  0.501  0.632  1.0
  Rb  Rb4  1  0.050  0.001  0.368  1.0
  Rb  Rb5  1  0.950  0.999  0.632  1.0
  Rb  Rb6  1  0.619  0.425  0.785  1.0
  Rb  Rb7  1  0.737  0.750  0.433  1.0
  Rb  Rb8  1  0.324  0.599  0.908  1.0
  Rb  Rb9  1  0.263  0.250  0.567  1.0
  Rb  Rb10  1  0.381  0.575  0.215  1.0
  Rb  Rb11  1  0.324  0.901  0.908  1.0
  Rb  Rb12  1  0.676  0.401  0.092  1.0
  Rb  Rb13  1  0.050  0.499  0.368  1.0
  Rb  Rb14  1  0.879  0.750  0.794  1.0
  Rb  Rb15  1  0.676  0.099  0.092  1.0
  Pb  Pb16  1  0.769  0.865  0.217  1.0
  Pb  Pb17  1  0.506  0.250  0.246  1.0
  Pb  Pb18  1  0.759  0.865  0.977  1.0
  Pb  Pb19  1  0.570  0.750  0.074  1.0
  Pb  Pb20  1  0.241  0.135  0.023  1.0
  Pb  Pb21  1  0.941  0.250  0.757  1.0
  Pb  Pb22  1  0.004  0.062  0.876  1.0
  Pb  Pb23  1  0.823  0.250  0.310  1.0
  Pb  Pb24  1  0.387  0.633  0.455  1.0
  Pb  Pb25  1  0.689  0.067  0.376  1.0
  Pb  Pb26  1  0.759  0.635  0.977  1.0
  Pb  Pb27  1  0.430  0.250  0.926  1.0
  Pb  Pb28  1  0.996  0.562  0.124  1.0
  Pb  Pb29  1  0.613  0.133  0.545  1.0
  Pb  Pb30  1  0.231  0.135  0.783  1.0
  Pb  Pb31  1  0.996  0.938  0.124  1.0
  Pb  Pb32  1  0.241  0.365  0.023  1.0
  Pb  Pb33  1  0.004  0.438  0.876  1.0
  Pb  Pb34  1  0.610  0.632  0.621  1.0
  Pb  Pb35  1  0.059  0.750  0.243  1.0
  Pb  Pb36  1  0.769  0.635  0.217  1.0
  Pb  Pb37  1  0.390  0.132  0.379  1.0
  Pb  Pb38  1  0.387  0.867  0.455  1.0
  Pb  Pb39  1  0.311  0.933  0.624  1.0
  Pb  Pb40  1  0.613  0.367  0.545  1.0
  Pb  Pb41  1  0.943  0.250  0.970  1.0
  Pb  Pb42  1  0.177  0.750  0.690  1.0
  Pb  Pb43  1  0.494  0.750  0.754  1.0
  Pb  Pb44  1  0.139  0.750  0.498  1.0
  Pb  Pb45  1  0.861  0.250  0.502  1.0
  Pb  Pb46  1  0.610  0.868  0.621  1.0
  Pb  Pb47  1  0.231  0.365  0.783  1.0
  Pb  Pb48  1  0.390  0.368  0.379  1.0
  Pb  Pb49  1  0.311  0.567  0.624  1.0
  Pb  Pb50  1  0.057  0.750  0.030  1.0
  Pb  Pb51  1  0.689  0.433  0.376  1.0
[/CIF]
.