The crystal structure described by Rb2Ba8Mg(Sb3O)2 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(4), and one Sb(6) atom. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. There are eight inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(2), one Sb(4), one Sb(5), and one O(2) atom. In the second Ba site, Ba(2) is bonded in a distorted single-bond geometry to one Sb(2), one Sb(3), one Sb(4), one Sb(5), and one O(2) atom. In the third Ba site, Ba(3) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(2), one Sb(5), and one O(1) atom. In the fourth Ba site, Ba(4) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(3), one Sb(4), one Sb(5), and one O(1) atom. In the fifth Ba site, Ba(5) is bonded in a distorted single-bond geometry to one Sb(2), one Sb(3), one Sb(4), and one O(1) atom. In the sixth Ba site, Ba(6) is bonded in a 6-coordinate geometry to one Mg(1), one Sb(1), one Sb(2), one Sb(3), one Sb(5), and one Sb(6) atom. In the seventh Ba site, Ba(7) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(5), and one O(2) atom. In the eighth Ba site, Ba(8) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(3), one Sb(5), and one O(2) atom. Mg(1) is bonded in a distorted single-bond geometry to one Ba(6), one Sb(4), one Sb(6), and one O(1) atom. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(3), one Ba(4), one Ba(6), one Ba(7), one Ba(8), and one Sb(3) atom. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(5), one Ba(6), and one Ba(7) atom. In the third Sb site, Sb(3) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(2), one Ba(4), one Ba(5), one Ba(6), one Ba(7), one Ba(8), and one Sb(1) atom. In the fourth Sb site, Sb(4) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(4), one Ba(5), and one Mg(1) atom. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Ba(6), one Ba(7), and one Ba(8) atom. In the sixth Sb site, Sb(6) is bonded in a 1-coordinate geometry to one Rb(1), one Ba(6), and one Mg(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to one Ba(3), one Ba(4), one Ba(5), and one Mg(1) atom. In the second O site, O(2) is bonded in a tetrahedral geometry to one Ba(1), one Ba(2), one Ba(7), and one Ba(8) atom. is represented by the CIF card [CIF]
data_Rb2Ba8Mg(Sb3O)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.864
_cell_length_b   9.372
_cell_length_c   11.304
_cell_angle_alpha   119.887
_cell_angle_beta   123.076
_cell_angle_gamma   82.676
_symmetry_Int_Tables_number   1
_cell_volume   744.015
_cell_formula_units_Z   1
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  0.001  0.997  0.994  1.0
  Rb  Rb1  1  0.491  0.513  0.012  1.0
  Ba  Ba2  1  0.478  0.694  0.733  1.0
  Ba  Ba3  1  0.183  0.010  0.715  1.0
  Ba  Ba4  1  0.860  0.018  0.261  1.0
  Ba  Ba5  1  0.988  0.473  0.695  1.0
  Ba  Ba6  1  0.510  0.306  0.260  1.0
  Ba  Ba7  1  0.675  0.207  0.736  1.0
  Ba  Ba8  1  0.990  0.503  0.305  1.0
  Ba  Ba9  1  0.297  0.805  0.349  1.0
  Mg  Mg10  1  0.608  0.982  0.343  1.0
  Sb  Sb11  1  0.885  0.618  0.994  1.0
  Sb  Sb12  1  0.640  0.146  0.988  1.0
  Sb  Sb13  1  0.107  0.384  0.009  1.0
  Sb  Sb14  1  0.352  0.870  0.012  1.0
  Sb  Sb15  1  0.248  0.265  0.529  1.0
  Sb  Sb16  1  0.738  0.777  0.491  1.0
  O  O17  1  0.742  0.201  0.443  1.0
  O  O18  1  0.236  0.751  0.519  1.0
[/CIF]
.
The crystal structure described by Rb2Ba8Mg(Sb3O)2 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(4), and one Sb(6) atom. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. There are eight inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(2), one Sb(4), one Sb(5), and one O(2) atom. In the second Ba site, Ba(2) is bonded in a distorted single-bond geometry to one Sb(2), one Sb(3), one Sb(4), one Sb(5), and one O(2) atom. In the third Ba site, Ba(3) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(2), one Sb(5), and one O(1) atom. In the fourth Ba site, Ba(4) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(3), one Sb(4), one Sb(5), and one O(1) atom. In the fifth Ba site, Ba(5) is bonded in a distorted single-bond geometry to one Sb(2), one Sb(3), one Sb(4), and one O(1) atom. In the sixth Ba site, Ba(6) is bonded in a 6-coordinate geometry to one Mg(1), one Sb(1), one Sb(2), one Sb(3), one Sb(5), and one Sb(6) atom. In the seventh Ba site, Ba(7) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(5), and one O(2) atom. In the eighth Ba site, Ba(8) is bonded in a distorted single-bond geometry to one Sb(1), one Sb(3), one Sb(5), and one O(2) atom. Mg(1) is bonded in a distorted single-bond geometry to one Ba(6), one Sb(4), one Sb(6), and one O(1) atom. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(3), one Ba(4), one Ba(6), one Ba(7), one Ba(8), and one Sb(3) atom. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(5), one Ba(6), and one Ba(7) atom. In the third Sb site, Sb(3) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(2), one Ba(4), one Ba(5), one Ba(6), one Ba(7), one Ba(8), and one Sb(1) atom. In the fourth Sb site, Sb(4) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(4), one Ba(5), and one Mg(1) atom. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Ba(6), one Ba(7), and one Ba(8) atom. In the sixth Sb site, Sb(6) is bonded in a 1-coordinate geometry to one Rb(1), one Ba(6), and one Mg(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to one Ba(3), one Ba(4), one Ba(5), and one Mg(1) atom. In the second O site, O(2) is bonded in a tetrahedral geometry to one Ba(1), one Ba(2), one Ba(7), and one Ba(8) atom. is represented by the CIF card [CIF]
data_Rb2Ba8Mg(Sb3O)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.864
_cell_length_b   9.372
_cell_length_c   11.304
_cell_angle_alpha   119.887
_cell_angle_beta   123.076
_cell_angle_gamma   82.676
_symmetry_Int_Tables_number   1
_cell_volume   744.015
_cell_formula_units_Z   1
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  0.001  0.997  0.994  1.0
  Rb  Rb1  1  0.491  0.513  0.012  1.0
  Ba  Ba2  1  0.478  0.694  0.733  1.0
  Ba  Ba3  1  0.183  0.010  0.715  1.0
  Ba  Ba4  1  0.860  0.018  0.261  1.0
  Ba  Ba5  1  0.988  0.473  0.695  1.0
  Ba  Ba6  1  0.510  0.306  0.260  1.0
  Ba  Ba7  1  0.675  0.207  0.736  1.0
  Ba  Ba8  1  0.990  0.503  0.305  1.0
  Ba  Ba9  1  0.297  0.805  0.349  1.0
  Mg  Mg10  1  0.608  0.982  0.343  1.0
  Sb  Sb11  1  0.885  0.618  0.994  1.0
  Sb  Sb12  1  0.640  0.146  0.988  1.0
  Sb  Sb13  1  0.107  0.384  0.009  1.0
  Sb  Sb14  1  0.352  0.870  0.012  1.0
  Sb  Sb15  1  0.248  0.265  0.529  1.0
  Sb  Sb16  1  0.738  0.777  0.491  1.0
  O  O17  1  0.742  0.201  0.443  1.0
  O  O18  1  0.236  0.751  0.519  1.0
[/CIF]
.