The compound described by Rb3Os2Br9 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to three equivalent Br(1) and nine equivalent Br(2) atoms to form distorted RbBr12 cuboctahedra that share corners with three equivalent Rb(2)Br12 cuboctahedra, corners with six equivalent Rb(1)Br12 cuboctahedra, corners with three equivalent Os(1)Br6 octahedra, faces with three equivalent Rb(2)Br12 cuboctahedra, faces with four equivalent Rb(1)Br12 cuboctahedra, and faces with four equivalent Os(1)Br6 octahedra. The corner-sharing octahedral tilt angles are 25°. In the second Rb site, Rb(2) is bonded to six equivalent Br(1) and six equivalent Br(2) atoms to form RbBr12 cuboctahedra that share corners with six equivalent Rb(1)Br12 cuboctahedra, corners with six equivalent Rb(2)Br12 cuboctahedra, faces with six equivalent Rb(1)Br12 cuboctahedra, and faces with six equivalent Os(1)Br6 octahedra. Os(1) is bonded to three equivalent Br(1) and three equivalent Br(2) atoms to form OsBr6 octahedra that share corners with three equivalent Rb(1)Br12 cuboctahedra, faces with three equivalent Rb(2)Br12 cuboctahedra, faces with four equivalent Rb(1)Br12 cuboctahedra, and  a faceface with one Os(1)Br6 octahedra. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 2-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Os(1) atoms. In the second Br site, Br(2) is bonded to one Rb(2), three equivalent Rb(1), and one Os(1) atom to form a mixture of distorted corner, edge, and face-sharing BrRb4Os square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Os2Br9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.489
_cell_length_b   7.489
_cell_length_c   18.221
_cell_angle_alpha   89.999
_cell_angle_beta   90.002
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   884.911
_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  0.333  0.667  0.564  1.0
  Rb  Rb1  1  0.667  0.333  0.064  1.0
  Rb  Rb2  1  0.667  0.333  0.436  1.0
  Rb  Rb3  1  0.333  0.667  0.936  1.0
  Rb  Rb4  1  0.000  0.000  0.250  1.0
  Rb  Rb5  1  0.000  0.000  0.750  1.0
  Os  Os6  1  0.667  0.333  0.824  1.0
  Os  Os7  1  0.333  0.667  0.324  1.0
  Os  Os8  1  0.333  0.667  0.176  1.0
  Os  Os9  1  0.667  0.333  0.676  1.0
  Br  Br10  1  0.499  0.999  0.250  1.0
  Br  Br11  1  0.501  0.499  0.750  1.0
  Br  Br12  1  0.999  0.499  0.750  1.0
  Br  Br13  1  0.001  0.501  0.250  1.0
  Br  Br14  1  0.499  0.501  0.250  1.0
  Br  Br15  1  0.501  0.001  0.750  1.0
  Br  Br16  1  0.824  0.176  0.904  1.0
  Br  Br17  1  0.824  0.648  0.904  1.0
  Br  Br18  1  0.352  0.176  0.904  1.0
  Br  Br19  1  0.648  0.824  0.404  1.0
  Br  Br20  1  0.824  0.648  0.596  1.0
  Br  Br21  1  0.176  0.824  0.096  1.0
  Br  Br22  1  0.648  0.824  0.096  1.0
  Br  Br23  1  0.352  0.176  0.596  1.0
  Br  Br24  1  0.824  0.176  0.596  1.0
  Br  Br25  1  0.176  0.352  0.404  1.0
  Br  Br26  1  0.176  0.824  0.404  1.0
  Br  Br27  1  0.176  0.352  0.096  1.0
[/CIF]
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The compound described by Rb3Os2Br9 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to three equivalent Br(1) and nine equivalent Br(2) atoms to form distorted RbBr12 cuboctahedra that share corners with three equivalent Rb(2)Br12 cuboctahedra, corners with six equivalent Rb(1)Br12 cuboctahedra, corners with three equivalent Os(1)Br6 octahedra, faces with three equivalent Rb(2)Br12 cuboctahedra, faces with four equivalent Rb(1)Br12 cuboctahedra, and faces with four equivalent Os(1)Br6 octahedra. The corner-sharing octahedral tilt angles are 25°. In the second Rb site, Rb(2) is bonded to six equivalent Br(1) and six equivalent Br(2) atoms to form RbBr12 cuboctahedra that share corners with six equivalent Rb(1)Br12 cuboctahedra, corners with six equivalent Rb(2)Br12 cuboctahedra, faces with six equivalent Rb(1)Br12 cuboctahedra, and faces with six equivalent Os(1)Br6 octahedra. Os(1) is bonded to three equivalent Br(1) and three equivalent Br(2) atoms to form OsBr6 octahedra that share corners with three equivalent Rb(1)Br12 cuboctahedra, faces with three equivalent Rb(2)Br12 cuboctahedra, faces with four equivalent Rb(1)Br12 cuboctahedra, and  a faceface with one Os(1)Br6 octahedra. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 2-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Os(1) atoms. In the second Br site, Br(2) is bonded to one Rb(2), three equivalent Rb(1), and one Os(1) atom to form a mixture of distorted corner, edge, and face-sharing BrRb4Os square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Os2Br9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.489
_cell_length_b   7.489
_cell_length_c   18.221
_cell_angle_alpha   89.999
_cell_angle_beta   90.002
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   884.911
_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  0.333  0.667  0.564  1.0
  Rb  Rb1  1  0.667  0.333  0.064  1.0
  Rb  Rb2  1  0.667  0.333  0.436  1.0
  Rb  Rb3  1  0.333  0.667  0.936  1.0
  Rb  Rb4  1  0.000  0.000  0.250  1.0
  Rb  Rb5  1  0.000  0.000  0.750  1.0
  Os  Os6  1  0.667  0.333  0.824  1.0
  Os  Os7  1  0.333  0.667  0.324  1.0
  Os  Os8  1  0.333  0.667  0.176  1.0
  Os  Os9  1  0.667  0.333  0.676  1.0
  Br  Br10  1  0.499  0.999  0.250  1.0
  Br  Br11  1  0.501  0.499  0.750  1.0
  Br  Br12  1  0.999  0.499  0.750  1.0
  Br  Br13  1  0.001  0.501  0.250  1.0
  Br  Br14  1  0.499  0.501  0.250  1.0
  Br  Br15  1  0.501  0.001  0.750  1.0
  Br  Br16  1  0.824  0.176  0.904  1.0
  Br  Br17  1  0.824  0.648  0.904  1.0
  Br  Br18  1  0.352  0.176  0.904  1.0
  Br  Br19  1  0.648  0.824  0.404  1.0
  Br  Br20  1  0.824  0.648  0.596  1.0
  Br  Br21  1  0.176  0.824  0.096  1.0
  Br  Br22  1  0.648  0.824  0.096  1.0
  Br  Br23  1  0.352  0.176  0.596  1.0
  Br  Br24  1  0.824  0.176  0.596  1.0
  Br  Br25  1  0.176  0.352  0.404  1.0
  Br  Br26  1  0.176  0.824  0.404  1.0
  Br  Br27  1  0.176  0.352  0.096  1.0
[/CIF]
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