The structure described by Rb3NaPbO4 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(3) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(3), one O(4), and three equivalent O(1) atoms. Na(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form NaO4 tetrahedra that share corners with four equivalent Pb(1)O4 tetrahedra and  an edgeedge with one Na(1)O4 tetrahedra. Pb(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PbO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Rb(1), three equivalent Rb(3), and one Pb(1) atom to form ORb5Pb octahedra that share corners with two equivalent O(3)Rb4NaPb octahedra, corners with four equivalent O(1)Rb5Pb octahedra, edges with two equivalent O(3)Rb4NaPb octahedra, and edges with two equivalent O(1)Rb5Pb octahedra. The corner-sharing octahedral tilt angles range from 18-71°. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), two equivalent Rb(2), two equivalent Na(1), and one Pb(1) atom. In the third O site, O(3) is bonded to one Rb(1), one Rb(3), two equivalent Rb(2), one Na(1), and one Pb(1) atom to form distorted ORb4NaPb octahedra that share corners with two equivalent O(3)Rb4NaPb octahedra, corners with two equivalent O(1)Rb5Pb octahedra, and edges with two equivalent O(1)Rb5Pb octahedra. The corner-sharing octahedral tilt angles range from 18-71°. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Na(1), and one Pb(1) atom. is represented by the CIF file [CIF]
data_Rb3NaPbO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.780
_cell_length_b   11.173
_cell_length_c   11.292
_cell_angle_alpha   68.351
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   795.102
_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  0.621  0.681  0.893  1.0
  Rb  Rb1  1  0.324  0.966  0.672  1.0
  Rb  Rb2  1  0.379  0.319  0.107  1.0
  Rb  Rb3  1  0.121  0.319  0.607  1.0
  Rb  Rb4  1  0.607  0.456  0.688  1.0
  Rb  Rb5  1  0.393  0.544  0.312  1.0
  Rb  Rb6  1  0.107  0.544  0.812  1.0
  Rb  Rb7  1  0.893  0.456  0.188  1.0
  Rb  Rb8  1  0.824  0.034  0.828  1.0
  Rb  Rb9  1  0.879  0.681  0.393  1.0
  Rb  Rb10  1  0.176  0.966  0.172  1.0
  Rb  Rb11  1  0.676  0.034  0.328  1.0
  Na  Na12  1  0.619  0.875  0.109  1.0
  Na  Na13  1  0.881  0.875  0.609  1.0
  Na  Na14  1  0.119  0.125  0.391  1.0
  Na  Na15  1  0.381  0.125  0.891  1.0
  Pb  Pb16  1  0.643  0.241  0.510  1.0
  Pb  Pb17  1  0.357  0.759  0.490  1.0
  Pb  Pb18  1  0.143  0.759  0.990  1.0
  Pb  Pb19  1  0.857  0.241  0.010  1.0
  O  O20  1  0.262  0.571  0.054  1.0
  O  O21  1  0.238  0.571  0.554  1.0
  O  O22  1  0.126  0.895  0.455  1.0
  O  O23  1  0.006  0.796  0.812  1.0
  O  O24  1  0.575  0.771  0.619  1.0
  O  O25  1  0.925  0.771  0.119  1.0
  O  O26  1  0.762  0.429  0.446  1.0
  O  O27  1  0.738  0.429  0.946  1.0
  O  O28  1  0.874  0.105  0.545  1.0
  O  O29  1  0.425  0.229  0.381  1.0
  O  O30  1  0.506  0.204  0.688  1.0
  O  O31  1  0.075  0.229  0.881  1.0
  O  O32  1  0.626  0.105  0.045  1.0
  O  O33  1  0.994  0.204  0.188  1.0
  O  O34  1  0.374  0.895  0.955  1.0
  O  O35  1  0.494  0.796  0.312  1.0
[/CIF]
.
The structure described by Rb3NaPbO4 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(3) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(3), one O(4), and three equivalent O(1) atoms. Na(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form NaO4 tetrahedra that share corners with four equivalent Pb(1)O4 tetrahedra and  an edgeedge with one Na(1)O4 tetrahedra. Pb(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PbO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Rb(1), three equivalent Rb(3), and one Pb(1) atom to form ORb5Pb octahedra that share corners with two equivalent O(3)Rb4NaPb octahedra, corners with four equivalent O(1)Rb5Pb octahedra, edges with two equivalent O(3)Rb4NaPb octahedra, and edges with two equivalent O(1)Rb5Pb octahedra. The corner-sharing octahedral tilt angles range from 18-71°. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), two equivalent Rb(2), two equivalent Na(1), and one Pb(1) atom. In the third O site, O(3) is bonded to one Rb(1), one Rb(3), two equivalent Rb(2), one Na(1), and one Pb(1) atom to form distorted ORb4NaPb octahedra that share corners with two equivalent O(3)Rb4NaPb octahedra, corners with two equivalent O(1)Rb5Pb octahedra, and edges with two equivalent O(1)Rb5Pb octahedra. The corner-sharing octahedral tilt angles range from 18-71°. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Na(1), and one Pb(1) atom. is represented by the CIF file [CIF]
data_Rb3NaPbO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.780
_cell_length_b   11.173
_cell_length_c   11.292
_cell_angle_alpha   68.351
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   795.102
_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  0.621  0.681  0.893  1.0
  Rb  Rb1  1  0.324  0.966  0.672  1.0
  Rb  Rb2  1  0.379  0.319  0.107  1.0
  Rb  Rb3  1  0.121  0.319  0.607  1.0
  Rb  Rb4  1  0.607  0.456  0.688  1.0
  Rb  Rb5  1  0.393  0.544  0.312  1.0
  Rb  Rb6  1  0.107  0.544  0.812  1.0
  Rb  Rb7  1  0.893  0.456  0.188  1.0
  Rb  Rb8  1  0.824  0.034  0.828  1.0
  Rb  Rb9  1  0.879  0.681  0.393  1.0
  Rb  Rb10  1  0.176  0.966  0.172  1.0
  Rb  Rb11  1  0.676  0.034  0.328  1.0
  Na  Na12  1  0.619  0.875  0.109  1.0
  Na  Na13  1  0.881  0.875  0.609  1.0
  Na  Na14  1  0.119  0.125  0.391  1.0
  Na  Na15  1  0.381  0.125  0.891  1.0
  Pb  Pb16  1  0.643  0.241  0.510  1.0
  Pb  Pb17  1  0.357  0.759  0.490  1.0
  Pb  Pb18  1  0.143  0.759  0.990  1.0
  Pb  Pb19  1  0.857  0.241  0.010  1.0
  O  O20  1  0.262  0.571  0.054  1.0
  O  O21  1  0.238  0.571  0.554  1.0
  O  O22  1  0.126  0.895  0.455  1.0
  O  O23  1  0.006  0.796  0.812  1.0
  O  O24  1  0.575  0.771  0.619  1.0
  O  O25  1  0.925  0.771  0.119  1.0
  O  O26  1  0.762  0.429  0.446  1.0
  O  O27  1  0.738  0.429  0.946  1.0
  O  O28  1  0.874  0.105  0.545  1.0
  O  O29  1  0.425  0.229  0.381  1.0
  O  O30  1  0.506  0.204  0.688  1.0
  O  O31  1  0.075  0.229  0.881  1.0
  O  O32  1  0.626  0.105  0.045  1.0
  O  O33  1  0.994  0.204  0.188  1.0
  O  O34  1  0.374  0.895  0.955  1.0
  O  O35  1  0.494  0.796  0.312  1.0
[/CIF]
.