The material described by Rb2Cr2O5 crystallizes in the orthorhombic Ima2 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form corner-sharing CrO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Rb(1) and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Rb(1) and two equivalent Cr(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Cr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.833
_cell_length_b   10.833
_cell_length_c   10.833
_cell_angle_alpha   150.784
_cell_angle_beta   149.943
_cell_angle_gamma   42.412
_symmetry_Int_Tables_number   1
_cell_volume   310.074
_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  0.890  0.393  0.503  1.0
  Rb  Rb1  1  0.110  0.613  0.503  1.0
  Rb  Rb2  1  0.390  0.893  0.503  1.0
  Rb  Rb3  1  0.610  0.113  0.503  1.0
  Cr  Cr4  1  0.000  0.000  0.000  1.0
  Cr  Cr5  1  0.500  0.500  0.000  1.0
  Cr  Cr6  1  0.677  0.718  0.896  1.0
  Cr  Cr7  1  0.323  0.218  0.041  1.0
  O  O8  1  0.252  0.252  0.500  1.0
  O  O9  1  0.748  0.249  0.000  1.0
  O  O10  1  0.252  0.752  0.000  1.0
  O  O11  1  0.748  0.749  0.500  1.0
  O  O12  1  0.878  0.845  0.077  1.0
  O  O13  1  0.122  0.199  0.966  1.0
  O  O14  1  0.267  0.345  0.966  1.0
  O  O15  1  0.733  0.699  0.077  1.0
  O  O16  1  0.596  0.395  0.492  1.0
  O  O17  1  0.404  0.895  0.799  1.0
[/CIF]
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The material described by Rb2Cr2O5 crystallizes in the orthorhombic Ima2 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form corner-sharing CrO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Rb(1) and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Rb(1) and two equivalent Cr(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Cr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.833
_cell_length_b   10.833
_cell_length_c   10.833
_cell_angle_alpha   150.784
_cell_angle_beta   149.943
_cell_angle_gamma   42.412
_symmetry_Int_Tables_number   1
_cell_volume   310.074
_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  0.890  0.393  0.503  1.0
  Rb  Rb1  1  0.110  0.613  0.503  1.0
  Rb  Rb2  1  0.390  0.893  0.503  1.0
  Rb  Rb3  1  0.610  0.113  0.503  1.0
  Cr  Cr4  1  0.000  0.000  0.000  1.0
  Cr  Cr5  1  0.500  0.500  0.000  1.0
  Cr  Cr6  1  0.677  0.718  0.896  1.0
  Cr  Cr7  1  0.323  0.218  0.041  1.0
  O  O8  1  0.252  0.252  0.500  1.0
  O  O9  1  0.748  0.249  0.000  1.0
  O  O10  1  0.252  0.752  0.000  1.0
  O  O11  1  0.748  0.749  0.500  1.0
  O  O12  1  0.878  0.845  0.077  1.0
  O  O13  1  0.122  0.199  0.966  1.0
  O  O14  1  0.267  0.345  0.966  1.0
  O  O15  1  0.733  0.699  0.077  1.0
  O  O16  1  0.596  0.395  0.492  1.0
  O  O17  1  0.404  0.895  0.799  1.0
[/CIF]
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