The material 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 6-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(4), one Sb(5), and one Sb(6) atom. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one Mg(1), one Sb(2), one Sb(3), 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(2), one Sb(4), one Sb(5), one Sb(6), and one O(2) atom. In the second Ba site, Ba(2) is bonded in a single-bond geometry to one Sb(2), one Sb(3), one Sb(4), one Sb(5), one Sb(6), and one O(2) atom. In the third Ba site, Ba(3) is bonded in a distorted single-bond geometry to one Mg(1), one Sb(2), one Sb(4), 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(3), one Sb(4), one Sb(6), 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), one Sb(5), one Sb(6), and one O(1) atom. In the sixth Ba site, Ba(6) is bonded in a distorted single-bond geometry to one Sb(2), one Sb(3), one Sb(5), one Sb(6), and one O(1) atom. In the seventh Ba site, Ba(7) is bonded in a distorted single-bond geometry to 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(3), one Sb(4), one Sb(5), one Sb(6), and one O(2) atom. Mg(1) is bonded in a 5-coordinate geometry to one Rb(2), one Ba(3), one Sb(1), one Sb(4), and one Sb(6) atom. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 1-coordinate geometry to one Rb(1) and one Mg(1) atom. In the second Sb site, Sb(2) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(5), one Ba(6), one Ba(7), and one Sb(4) atom. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), one Ba(2), one Ba(4), one Ba(5), one Ba(6), one Ba(7), and one Ba(8) atom. In the fourth Sb site, Sb(4) is bonded in a 9-coordinate geometry to one Rb(1), one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Ba(5), one Ba(8), one Mg(1), and one Sb(2) atom. In the fifth Sb site, Sb(5) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(5), one Ba(6), one Ba(7), and one Ba(8) atom. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to one Rb(1), one Ba(1), one Ba(2), one Ba(4), one Ba(5), one Ba(6), one Ba(8), and one Mg(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a tetrahedral geometry to one Ba(3), one Ba(4), one Ba(5), and one Ba(6) 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 Crystallographic Information File (CIF) [CIF]
data_Rb2Ba8Mg(Sb3O)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.455
_cell_length_b   9.598
_cell_length_c   10.165
_cell_angle_alpha   112.608
_cell_angle_beta   116.196
_cell_angle_gamma   93.580
_symmetry_Int_Tables_number   1
_cell_volume   733.472
_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  0.007  0.005  0.007  1.0
  Rb  Rb1  1  0.439  0.395  0.896  1.0
  Ba  Ba2  1  0.502  0.684  0.698  1.0
  Ba  Ba3  1  0.188  0.956  0.671  1.0
  Ba  Ba4  1  0.871  0.103  0.370  1.0
  Ba  Ba5  1  0.987  0.551  0.749  1.0
  Ba  Ba6  1  0.496  0.310  0.292  1.0
  Ba  Ba7  1  0.705  0.203  0.700  1.0
  Ba  Ba8  1  0.006  0.476  0.281  1.0
  Ba  Ba9  1  0.295  0.783  0.288  1.0
  Mg  Mg10  1  0.659  0.735  0.188  1.0
  Sb  Sb11  1  0.844  0.661  0.034  1.0
  Sb  Sb12  1  0.613  0.095  0.992  1.0
  Sb  Sb13  1  0.134  0.351  0.986  1.0
  Sb  Sb14  1  0.412  0.882  0.027  1.0
  Sb  Sb15  1  0.271  0.235  0.474  1.0
  Sb  Sb16  1  0.743  0.767  0.503  1.0
  O  O17  1  0.767  0.301  0.525  1.0
  O  O18  1  0.247  0.726  0.492  1.0
[/CIF]
.
The material 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 6-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(4), one Sb(5), and one Sb(6) atom. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one Mg(1), one Sb(2), one Sb(3), 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(2), one Sb(4), one Sb(5), one Sb(6), and one O(2) atom. In the second Ba site, Ba(2) is bonded in a single-bond geometry to one Sb(2), one Sb(3), one Sb(4), one Sb(5), one Sb(6), and one O(2) atom. In the third Ba site, Ba(3) is bonded in a distorted single-bond geometry to one Mg(1), one Sb(2), one Sb(4), 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(3), one Sb(4), one Sb(6), 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), one Sb(5), one Sb(6), and one O(1) atom. In the sixth Ba site, Ba(6) is bonded in a distorted single-bond geometry to one Sb(2), one Sb(3), one Sb(5), one Sb(6), and one O(1) atom. In the seventh Ba site, Ba(7) is bonded in a distorted single-bond geometry to 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(3), one Sb(4), one Sb(5), one Sb(6), and one O(2) atom. Mg(1) is bonded in a 5-coordinate geometry to one Rb(2), one Ba(3), one Sb(1), one Sb(4), and one Sb(6) atom. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 1-coordinate geometry to one Rb(1) and one Mg(1) atom. In the second Sb site, Sb(2) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(5), one Ba(6), one Ba(7), and one Sb(4) atom. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one Rb(1), one Rb(2), one Ba(2), one Ba(4), one Ba(5), one Ba(6), one Ba(7), and one Ba(8) atom. In the fourth Sb site, Sb(4) is bonded in a 9-coordinate geometry to one Rb(1), one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Ba(5), one Ba(8), one Mg(1), and one Sb(2) atom. In the fifth Sb site, Sb(5) is bonded in a 9-coordinate geometry to one Rb(1), one Rb(2), one Ba(1), one Ba(2), one Ba(3), one Ba(5), one Ba(6), one Ba(7), and one Ba(8) atom. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to one Rb(1), one Ba(1), one Ba(2), one Ba(4), one Ba(5), one Ba(6), one Ba(8), and one Mg(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a tetrahedral geometry to one Ba(3), one Ba(4), one Ba(5), and one Ba(6) 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 Crystallographic Information File (CIF) [CIF]
data_Rb2Ba8Mg(Sb3O)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.455
_cell_length_b   9.598
_cell_length_c   10.165
_cell_angle_alpha   112.608
_cell_angle_beta   116.196
_cell_angle_gamma   93.580
_symmetry_Int_Tables_number   1
_cell_volume   733.472
_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  0.007  0.005  0.007  1.0
  Rb  Rb1  1  0.439  0.395  0.896  1.0
  Ba  Ba2  1  0.502  0.684  0.698  1.0
  Ba  Ba3  1  0.188  0.956  0.671  1.0
  Ba  Ba4  1  0.871  0.103  0.370  1.0
  Ba  Ba5  1  0.987  0.551  0.749  1.0
  Ba  Ba6  1  0.496  0.310  0.292  1.0
  Ba  Ba7  1  0.705  0.203  0.700  1.0
  Ba  Ba8  1  0.006  0.476  0.281  1.0
  Ba  Ba9  1  0.295  0.783  0.288  1.0
  Mg  Mg10  1  0.659  0.735  0.188  1.0
  Sb  Sb11  1  0.844  0.661  0.034  1.0
  Sb  Sb12  1  0.613  0.095  0.992  1.0
  Sb  Sb13  1  0.134  0.351  0.986  1.0
  Sb  Sb14  1  0.412  0.882  0.027  1.0
  Sb  Sb15  1  0.271  0.235  0.474  1.0
  Sb  Sb16  1  0.743  0.767  0.503  1.0
  O  O17  1  0.767  0.301  0.525  1.0
  O  O18  1  0.247  0.726  0.492  1.0
[/CIF]
.