The structure described by Cr3O5 crystallizes in the triclinic P1 space group. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of edge and corner-sharing CrO5 trigonal bipyramids. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted edge, corner, and face-sharing CrO5 trigonal bipyramids. In the third Cr site, Cr(3) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted corner and face-sharing CrO5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cr(1), one Cr(2), and one Cr(3) atom. is represented by the CIF file [CIF]
data_Cr3O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.810
_cell_length_b   5.286
_cell_length_c   5.296
_cell_angle_alpha   113.013
_cell_angle_beta   91.647
_cell_angle_gamma   114.834
_symmetry_Int_Tables_number   1
_cell_volume   109.427
_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  0.852  0.765  0.561  1.0
  Cr  Cr1  1  0.211  0.308  0.466  1.0
  Cr  Cr2  1  0.272  0.623  0.016  1.0
  O  O3  1  0.112  0.872  0.283  1.0
  O  O4  1  0.481  0.525  0.274  1.0
  O  O5  1  0.982  0.178  0.753  1.0
  O  O6  1  0.568  0.570  0.772  1.0
  O  O7  1  0.123  0.659  0.674  1.0
[/CIF]
.
The structure described by Cr3O5 crystallizes in the triclinic P1 space group. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of edge and corner-sharing CrO5 trigonal bipyramids. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted edge, corner, and face-sharing CrO5 trigonal bipyramids. In the third Cr site, Cr(3) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted corner and face-sharing CrO5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cr(1), one Cr(2), and one Cr(3) atom. is represented by the CIF file [CIF]
data_Cr3O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.810
_cell_length_b   5.286
_cell_length_c   5.296
_cell_angle_alpha   113.013
_cell_angle_beta   91.647
_cell_angle_gamma   114.834
_symmetry_Int_Tables_number   1
_cell_volume   109.427
_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  0.852  0.765  0.561  1.0
  Cr  Cr1  1  0.211  0.308  0.466  1.0
  Cr  Cr2  1  0.272  0.623  0.016  1.0
  O  O3  1  0.112  0.872  0.283  1.0
  O  O4  1  0.481  0.525  0.274  1.0
  O  O5  1  0.982  0.178  0.753  1.0
  O  O6  1  0.568  0.570  0.772  1.0
  O  O7  1  0.123  0.659  0.674  1.0
[/CIF]
.