The material described by Rb3Cr(HO)6 crystallizes in the trigonal R-3c space group. Rb(1) is bonded to two equivalent H(1) and six equivalent O(1) atoms to form distorted RbH2O6 hexagonal bipyramids that share corners with four equivalent Rb(1)H2O6 hexagonal bipyramids, edges with four equivalent Rb(1)H2O6 hexagonal bipyramids, and faces with two equivalent Cr(1)O6 octahedra. Cr(1) is bonded to six equivalent O(1) atoms to form CrO6 octahedra that share faces with six equivalent Rb(1)H2O6 hexagonal bipyramids. H(1) is bonded in a distorted single-bond geometry to one Rb(1) and one H(1) atom. O(1) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one Cr(1) atom. is represented by the CIF card [CIF]
data_Rb3Cr(HO)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.109
_cell_length_b   8.109
_cell_length_c   8.109
_cell_angle_alpha   85.645
_cell_angle_beta   85.645
_cell_angle_gamma   85.645
_symmetry_Int_Tables_number   1
_cell_volume   528.893
_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  0.358  0.142  0.750  1.0
  Rb  Rb1  1  0.142  0.750  0.358  1.0
  Rb  Rb2  1  0.750  0.358  0.142  1.0
  Rb  Rb3  1  0.642  0.858  0.250  1.0
  Rb  Rb4  1  0.858  0.250  0.642  1.0
  Rb  Rb5  1  0.250  0.642  0.858  1.0
  Cr  Cr6  1  0.500  0.500  0.500  1.0
  Cr  Cr7  1  0.000  0.000  0.000  1.0
  H  H8  1  0.905  0.780  0.640  1.0
  H  H9  1  0.780  0.640  0.905  1.0
  H  H10  1  0.640  0.905  0.780  1.0
  H  H11  1  0.720  0.595  0.860  1.0
  H  H12  1  0.595  0.860  0.720  1.0
  H  H13  1  0.860  0.720  0.595  1.0
  H  H14  1  0.095  0.220  0.360  1.0
  H  H15  1  0.220  0.360  0.095  1.0
  H  H16  1  0.360  0.095  0.220  1.0
  H  H17  1  0.280  0.405  0.140  1.0
  H  H18  1  0.405  0.140  0.280  1.0
  H  H19  1  0.140  0.280  0.405  1.0
  O  O20  1  0.054  0.955  0.785  1.0
  O  O21  1  0.955  0.785  0.054  1.0
  O  O22  1  0.785  0.054  0.955  1.0
  O  O23  1  0.545  0.446  0.715  1.0
  O  O24  1  0.446  0.715  0.545  1.0
  O  O25  1  0.715  0.545  0.446  1.0
  O  O26  1  0.946  0.045  0.215  1.0
  O  O27  1  0.045  0.215  0.946  1.0
  O  O28  1  0.215  0.946  0.045  1.0
  O  O29  1  0.455  0.554  0.285  1.0
  O  O30  1  0.554  0.285  0.455  1.0
  O  O31  1  0.285  0.455  0.554  1.0
[/CIF]
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The material described by Rb3Cr(HO)6 crystallizes in the trigonal R-3c space group. Rb(1) is bonded to two equivalent H(1) and six equivalent O(1) atoms to form distorted RbH2O6 hexagonal bipyramids that share corners with four equivalent Rb(1)H2O6 hexagonal bipyramids, edges with four equivalent Rb(1)H2O6 hexagonal bipyramids, and faces with two equivalent Cr(1)O6 octahedra. Cr(1) is bonded to six equivalent O(1) atoms to form CrO6 octahedra that share faces with six equivalent Rb(1)H2O6 hexagonal bipyramids. H(1) is bonded in a distorted single-bond geometry to one Rb(1) and one H(1) atom. O(1) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one Cr(1) atom. is represented by the CIF card [CIF]
data_Rb3Cr(HO)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.109
_cell_length_b   8.109
_cell_length_c   8.109
_cell_angle_alpha   85.645
_cell_angle_beta   85.645
_cell_angle_gamma   85.645
_symmetry_Int_Tables_number   1
_cell_volume   528.893
_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  0.358  0.142  0.750  1.0
  Rb  Rb1  1  0.142  0.750  0.358  1.0
  Rb  Rb2  1  0.750  0.358  0.142  1.0
  Rb  Rb3  1  0.642  0.858  0.250  1.0
  Rb  Rb4  1  0.858  0.250  0.642  1.0
  Rb  Rb5  1  0.250  0.642  0.858  1.0
  Cr  Cr6  1  0.500  0.500  0.500  1.0
  Cr  Cr7  1  0.000  0.000  0.000  1.0
  H  H8  1  0.905  0.780  0.640  1.0
  H  H9  1  0.780  0.640  0.905  1.0
  H  H10  1  0.640  0.905  0.780  1.0
  H  H11  1  0.720  0.595  0.860  1.0
  H  H12  1  0.595  0.860  0.720  1.0
  H  H13  1  0.860  0.720  0.595  1.0
  H  H14  1  0.095  0.220  0.360  1.0
  H  H15  1  0.220  0.360  0.095  1.0
  H  H16  1  0.360  0.095  0.220  1.0
  H  H17  1  0.280  0.405  0.140  1.0
  H  H18  1  0.405  0.140  0.280  1.0
  H  H19  1  0.140  0.280  0.405  1.0
  O  O20  1  0.054  0.955  0.785  1.0
  O  O21  1  0.955  0.785  0.054  1.0
  O  O22  1  0.785  0.054  0.955  1.0
  O  O23  1  0.545  0.446  0.715  1.0
  O  O24  1  0.446  0.715  0.545  1.0
  O  O25  1  0.715  0.545  0.446  1.0
  O  O26  1  0.946  0.045  0.215  1.0
  O  O27  1  0.045  0.215  0.946  1.0
  O  O28  1  0.215  0.946  0.045  1.0
  O  O29  1  0.455  0.554  0.285  1.0
  O  O30  1  0.554  0.285  0.455  1.0
  O  O31  1  0.285  0.455  0.554  1.0
[/CIF]
.