The structure described by Rb7NbAs4 crystallizes in the orthorhombic Pmn2_1 space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 3-coordinate geometry to one As(1) and two equivalent As(3) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one As(1), one As(2), and two equivalent As(3) atoms. In the third Rb site, Rb(3) is bonded in a 3-coordinate geometry to one As(1) and two equivalent As(3) atoms. In the fourth Rb site, Rb(4) is bonded in a 3-coordinate geometry to two equivalent As(2) and two equivalent As(3) atoms. In the fifth Rb site, Rb(5) is bonded in a 4-coordinate geometry to one As(1), one As(2), and two equivalent As(3) atoms. Nb(1) is bonded in a tetrahedral geometry to one As(1), one As(2), and two equivalent As(3) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(3), one Rb(5), two equivalent Rb(2), and one Nb(1) atom. In the second As site, As(2) is bonded in a 1-coordinate geometry to one Rb(5), two equivalent Rb(2), four equivalent Rb(4), and one Nb(1) atom. In the third As site, As(3) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(3), one Rb(5), two equivalent Rb(2), two equivalent Rb(4), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb7NbAs4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.669
_cell_length_b   9.543
_cell_length_c   10.678
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   883.395
_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
  Rb  Rb0  1  0.875  0.036  0.000  1.0
  Rb  Rb1  1  0.706  0.834  0.714  1.0
  Rb  Rb2  1  0.394  0.897  0.000  1.0
  Rb  Rb3  1  0.375  0.964  0.500  1.0
  Rb  Rb4  1  0.875  0.470  0.290  1.0
  Rb  Rb5  1  0.894  0.103  0.500  1.0
  Rb  Rb6  1  0.664  0.340  0.000  1.0
  Rb  Rb7  1  0.164  0.660  0.500  1.0
  Rb  Rb8  1  0.206  0.166  0.214  1.0
  Rb  Rb9  1  0.375  0.530  0.210  1.0
  Rb  Rb10  1  0.375  0.530  0.790  1.0
  Rb  Rb11  1  0.875  0.470  0.710  1.0
  Rb  Rb12  1  0.706  0.834  0.286  1.0
  Rb  Rb13  1  0.206  0.166  0.786  1.0
  Nb  Nb14  1  0.999  0.674  0.000  1.0
  Nb  Nb15  1  0.499  0.326  0.500  1.0
  As  As16  1  0.711  0.684  0.000  1.0
  As  As17  1  0.211  0.316  0.500  1.0
  As  As18  1  0.074  0.419  0.000  1.0
  As  As19  1  0.574  0.581  0.500  1.0
  As  As20  1  0.091  0.803  0.196  1.0
  As  As21  1  0.591  0.197  0.304  1.0
  As  As22  1  0.591  0.197  0.696  1.0
  As  As23  1  0.091  0.803  0.804  1.0
[/CIF]
.
The structure described by Rb7NbAs4 crystallizes in the orthorhombic Pmn2_1 space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 3-coordinate geometry to one As(1) and two equivalent As(3) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one As(1), one As(2), and two equivalent As(3) atoms. In the third Rb site, Rb(3) is bonded in a 3-coordinate geometry to one As(1) and two equivalent As(3) atoms. In the fourth Rb site, Rb(4) is bonded in a 3-coordinate geometry to two equivalent As(2) and two equivalent As(3) atoms. In the fifth Rb site, Rb(5) is bonded in a 4-coordinate geometry to one As(1), one As(2), and two equivalent As(3) atoms. Nb(1) is bonded in a tetrahedral geometry to one As(1), one As(2), and two equivalent As(3) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(3), one Rb(5), two equivalent Rb(2), and one Nb(1) atom. In the second As site, As(2) is bonded in a 1-coordinate geometry to one Rb(5), two equivalent Rb(2), four equivalent Rb(4), and one Nb(1) atom. In the third As site, As(3) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(3), one Rb(5), two equivalent Rb(2), two equivalent Rb(4), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb7NbAs4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.669
_cell_length_b   9.543
_cell_length_c   10.678
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   883.395
_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
  Rb  Rb0  1  0.875  0.036  0.000  1.0
  Rb  Rb1  1  0.706  0.834  0.714  1.0
  Rb  Rb2  1  0.394  0.897  0.000  1.0
  Rb  Rb3  1  0.375  0.964  0.500  1.0
  Rb  Rb4  1  0.875  0.470  0.290  1.0
  Rb  Rb5  1  0.894  0.103  0.500  1.0
  Rb  Rb6  1  0.664  0.340  0.000  1.0
  Rb  Rb7  1  0.164  0.660  0.500  1.0
  Rb  Rb8  1  0.206  0.166  0.214  1.0
  Rb  Rb9  1  0.375  0.530  0.210  1.0
  Rb  Rb10  1  0.375  0.530  0.790  1.0
  Rb  Rb11  1  0.875  0.470  0.710  1.0
  Rb  Rb12  1  0.706  0.834  0.286  1.0
  Rb  Rb13  1  0.206  0.166  0.786  1.0
  Nb  Nb14  1  0.999  0.674  0.000  1.0
  Nb  Nb15  1  0.499  0.326  0.500  1.0
  As  As16  1  0.711  0.684  0.000  1.0
  As  As17  1  0.211  0.316  0.500  1.0
  As  As18  1  0.074  0.419  0.000  1.0
  As  As19  1  0.574  0.581  0.500  1.0
  As  As20  1  0.091  0.803  0.196  1.0
  As  As21  1  0.591  0.197  0.304  1.0
  As  As22  1  0.591  0.197  0.696  1.0
  As  As23  1  0.091  0.803  0.804  1.0
[/CIF]
.