The material structure described by RbCr(SO4)2 crystallizes in the monoclinic C2 space group. Rb(1) is bonded to two equivalent O(2), two equivalent O(3), two equivalent O(4), and six equivalent O(1) atoms to form RbO12 cuboctahedra that share edges with six equivalent Rb(1)O12 cuboctahedra, edges with six equivalent S(1)O4 tetrahedra, and faces with two equivalent Cr(1)O6 octahedra. Cr(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra and faces with two equivalent Rb(1)O12 cuboctahedra. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with three equivalent Cr(1)O6 octahedra and edges with three equivalent Rb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 25-26°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Rb(1) and one S(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Rb(1), one Cr(1), and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Rb(1), one Cr(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Rb(1), one Cr(1), and one S(1) atom. is represented by the CIF file [CIF]
data_RbCr(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.079
_cell_length_b   5.080
_cell_length_c   8.442
_cell_angle_alpha   89.873
_cell_angle_beta   89.952
_cell_angle_gamma   60.068
_symmetry_Int_Tables_number   1
_cell_volume   188.781
_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
  Cr  Cr0  1  1.000  1.000  0.000  1.0
  O  O1  1  0.334  0.332  0.379  1.0
  O  O2  1  0.667  0.668  0.621  1.0
  O  O3  1  0.126  0.225  0.148  1.0
  O  O4  1  0.648  0.127  0.148  1.0
  O  O5  1  0.351  0.775  0.852  1.0
  O  O6  1  0.225  0.648  0.149  1.0
  O  O7  1  0.776  0.873  0.852  1.0
  O  O8  1  0.873  0.352  0.852  1.0
  Rb  Rb9  1  0.000  0.000  0.500  1.0
  S  S10  1  0.333  0.333  0.206  1.0
  S  S11  1  0.666  0.667  0.794  1.0
[/CIF]
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The material structure described by RbCr(SO4)2 crystallizes in the monoclinic C2 space group. Rb(1) is bonded to two equivalent O(2), two equivalent O(3), two equivalent O(4), and six equivalent O(1) atoms to form RbO12 cuboctahedra that share edges with six equivalent Rb(1)O12 cuboctahedra, edges with six equivalent S(1)O4 tetrahedra, and faces with two equivalent Cr(1)O6 octahedra. Cr(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra and faces with two equivalent Rb(1)O12 cuboctahedra. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with three equivalent Cr(1)O6 octahedra and edges with three equivalent Rb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 25-26°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Rb(1) and one S(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Rb(1), one Cr(1), and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Rb(1), one Cr(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Rb(1), one Cr(1), and one S(1) atom. is represented by the CIF file [CIF]
data_RbCr(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.079
_cell_length_b   5.080
_cell_length_c   8.442
_cell_angle_alpha   89.873
_cell_angle_beta   89.952
_cell_angle_gamma   60.068
_symmetry_Int_Tables_number   1
_cell_volume   188.781
_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
  Cr  Cr0  1  1.000  1.000  0.000  1.0
  O  O1  1  0.334  0.332  0.379  1.0
  O  O2  1  0.667  0.668  0.621  1.0
  O  O3  1  0.126  0.225  0.148  1.0
  O  O4  1  0.648  0.127  0.148  1.0
  O  O5  1  0.351  0.775  0.852  1.0
  O  O6  1  0.225  0.648  0.149  1.0
  O  O7  1  0.776  0.873  0.852  1.0
  O  O8  1  0.873  0.352  0.852  1.0
  Rb  Rb9  1  0.000  0.000  0.500  1.0
  S  S10  1  0.333  0.333  0.206  1.0
  S  S11  1  0.666  0.667  0.794  1.0
[/CIF]
.