The material structure described by Rb3AsSe4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one Se(3), two equivalent Se(2), and four equivalent Se(1) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to two equivalent Se(2), two equivalent Se(3), and three equivalent Se(1) atoms. As(1) is bonded in a tetrahedral geometry to one Se(2), one Se(3), and two equivalent Se(1) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), three equivalent Rb(2), and one As(1) atom. In the second Se site, Se(2) is bonded in a 7-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), and one As(1) atom. In the third Se site, Se(3) is bonded to one Rb(1), four equivalent Rb(2), and one As(1) atom to form edge-sharing SeRb5As octahedra. is represented by the CIF card [CIF]
data_Rb3AsSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.742
_cell_length_b   10.132
_cell_length_c   11.457
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1130.793
_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  0.649  0.916  0.250  1.0
  Rb  Rb1  1  0.149  0.584  0.250  1.0
  Rb  Rb2  1  0.851  0.416  0.750  1.0
  Rb  Rb3  1  0.351  0.084  0.750  1.0
  Rb  Rb4  1  0.057  0.805  0.957  1.0
  Rb  Rb5  1  0.557  0.695  0.543  1.0
  Rb  Rb6  1  0.443  0.305  0.043  1.0
  Rb  Rb7  1  0.943  0.195  0.457  1.0
  Rb  Rb8  1  0.943  0.195  0.043  1.0
  Rb  Rb9  1  0.443  0.305  0.457  1.0
  Rb  Rb10  1  0.557  0.695  0.957  1.0
  Rb  Rb11  1  0.057  0.805  0.543  1.0
  As  As12  1  0.772  0.976  0.750  1.0
  As  As13  1  0.228  0.024  0.250  1.0
  As  As14  1  0.728  0.476  0.250  1.0
  As  As15  1  0.272  0.524  0.750  1.0
  Se  Se16  1  0.349  0.970  0.082  1.0
  Se  Se17  1  0.849  0.530  0.418  1.0
  Se  Se18  1  0.151  0.470  0.918  1.0
  Se  Se19  1  0.651  0.030  0.582  1.0
  Se  Se20  1  0.016  0.914  0.250  1.0
  Se  Se21  1  0.516  0.586  0.250  1.0
  Se  Se22  1  0.484  0.414  0.750  1.0
  Se  Se23  1  0.984  0.086  0.750  1.0
  Se  Se24  1  0.651  0.030  0.918  1.0
  Se  Se25  1  0.349  0.970  0.418  1.0
  Se  Se26  1  0.849  0.530  0.082  1.0
  Se  Se27  1  0.151  0.470  0.582  1.0
  Se  Se28  1  0.813  0.750  0.750  1.0
  Se  Se29  1  0.313  0.750  0.750  1.0
  Se  Se30  1  0.687  0.250  0.250  1.0
  Se  Se31  1  0.187  0.250  0.250  1.0
[/CIF]
.
The material structure described by Rb3AsSe4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one Se(3), two equivalent Se(2), and four equivalent Se(1) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to two equivalent Se(2), two equivalent Se(3), and three equivalent Se(1) atoms. As(1) is bonded in a tetrahedral geometry to one Se(2), one Se(3), and two equivalent Se(1) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), three equivalent Rb(2), and one As(1) atom. In the second Se site, Se(2) is bonded in a 7-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), and one As(1) atom. In the third Se site, Se(3) is bonded to one Rb(1), four equivalent Rb(2), and one As(1) atom to form edge-sharing SeRb5As octahedra. is represented by the CIF card [CIF]
data_Rb3AsSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.742
_cell_length_b   10.132
_cell_length_c   11.457
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1130.793
_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  0.649  0.916  0.250  1.0
  Rb  Rb1  1  0.149  0.584  0.250  1.0
  Rb  Rb2  1  0.851  0.416  0.750  1.0
  Rb  Rb3  1  0.351  0.084  0.750  1.0
  Rb  Rb4  1  0.057  0.805  0.957  1.0
  Rb  Rb5  1  0.557  0.695  0.543  1.0
  Rb  Rb6  1  0.443  0.305  0.043  1.0
  Rb  Rb7  1  0.943  0.195  0.457  1.0
  Rb  Rb8  1  0.943  0.195  0.043  1.0
  Rb  Rb9  1  0.443  0.305  0.457  1.0
  Rb  Rb10  1  0.557  0.695  0.957  1.0
  Rb  Rb11  1  0.057  0.805  0.543  1.0
  As  As12  1  0.772  0.976  0.750  1.0
  As  As13  1  0.228  0.024  0.250  1.0
  As  As14  1  0.728  0.476  0.250  1.0
  As  As15  1  0.272  0.524  0.750  1.0
  Se  Se16  1  0.349  0.970  0.082  1.0
  Se  Se17  1  0.849  0.530  0.418  1.0
  Se  Se18  1  0.151  0.470  0.918  1.0
  Se  Se19  1  0.651  0.030  0.582  1.0
  Se  Se20  1  0.016  0.914  0.250  1.0
  Se  Se21  1  0.516  0.586  0.250  1.0
  Se  Se22  1  0.484  0.414  0.750  1.0
  Se  Se23  1  0.984  0.086  0.750  1.0
  Se  Se24  1  0.651  0.030  0.918  1.0
  Se  Se25  1  0.349  0.970  0.418  1.0
  Se  Se26  1  0.849  0.530  0.082  1.0
  Se  Se27  1  0.151  0.470  0.582  1.0
  Se  Se28  1  0.813  0.750  0.750  1.0
  Se  Se29  1  0.313  0.750  0.750  1.0
  Se  Se30  1  0.687  0.250  0.250  1.0
  Se  Se31  1  0.187  0.250  0.250  1.0
[/CIF]
.