The material structure described by Cr(SeO2OH)(Se2O5) crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. H(1) is bonded in a single-bond geometry to one O(1) and one O(7) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(8) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(4), and one O(8) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. In the second O site, O(5) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the third O site, O(6) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the fourth O site, O(7) is bonded in a water-like geometry to one H(1) and one Se(3) atom. In the fifth O site, O(8) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one H(1), and one Se(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one Se(1) atom. In the eighth O site, O(3) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. is represented by the CIF file [CIF]
data_CrHSe3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.553
_cell_length_b   13.002
_cell_length_c   10.696
_cell_angle_alpha   90.000
_cell_angle_beta   133.072
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   767.338
_cell_formula_units_Z   4
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  0.126  0.178  0.944  1.0
  Cr  Cr1  1  0.126  0.322  0.444  1.0
  Cr  Cr2  1  0.874  0.822  0.056  1.0
  Cr  Cr3  1  0.874  0.678  0.556  1.0
  H  H4  1  0.430  0.389  0.081  1.0
  H  H5  1  0.430  0.111  0.581  1.0
  H  H6  1  0.570  0.611  0.919  1.0
  H  H7  1  0.570  0.889  0.419  1.0
  Se  Se8  1  0.654  0.299  0.564  1.0
  Se  Se9  1  0.654  0.201  0.064  1.0
  Se  Se10  1  0.346  0.701  0.436  1.0
  Se  Se11  1  0.346  0.799  0.936  1.0
  Se  Se12  1  0.997  0.137  0.579  1.0
  Se  Se13  1  0.997  0.363  0.079  1.0
  Se  Se14  1  0.003  0.863  0.421  1.0
  Se  Se15  1  0.003  0.637  0.921  1.0
  Se  Se16  1  0.287  0.010  0.222  1.0
  Se  Se17  1  0.287  0.490  0.722  1.0
  Se  Se18  1  0.713  0.990  0.778  1.0
  Se  Se19  1  0.713  0.510  0.278  1.0
  O  O20  1  0.425  0.261  0.035  1.0
  O  O21  1  0.425  0.239  0.535  1.0
  O  O22  1  0.575  0.739  0.965  1.0
  O  O23  1  0.575  0.761  0.465  1.0
  O  O24  1  0.908  0.293  0.776  1.0
  O  O25  1  0.908  0.207  0.276  1.0
  O  O26  1  0.092  0.707  0.224  1.0
  O  O27  1  0.092  0.793  0.724  1.0
  O  O28  1  0.112  0.100  0.775  1.0
  O  O29  1  0.112  0.400  0.275  1.0
  O  O30  1  0.888  0.900  0.225  1.0
  O  O31  1  0.888  0.600  0.725  1.0
  O  O32  1  0.155  0.253  0.124  1.0
  O  O33  1  0.155  0.247  0.624  1.0
  O  O34  1  0.845  0.747  0.876  1.0
  O  O35  1  0.845  0.753  0.376  1.0
  O  O36  1  0.646  0.568  0.385  1.0
  O  O37  1  0.646  0.932  0.885  1.0
  O  O38  1  0.354  0.432  0.615  1.0
  O  O39  1  0.354  0.068  0.115  1.0
  O  O40  1  0.153  0.897  0.110  1.0
  O  O41  1  0.153  0.603  0.610  1.0
  O  O42  1  0.847  0.103  0.890  1.0
  O  O43  1  0.847  0.397  0.390  1.0
  O  O44  1  0.412  0.462  0.105  1.0
  O  O45  1  0.412  0.038  0.605  1.0
  O  O46  1  0.588  0.538  0.895  1.0
  O  O47  1  0.588  0.962  0.395  1.0
  O  O48  1  0.303  0.688  0.020  1.0
  O  O49  1  0.303  0.812  0.520  1.0
  O  O50  1  0.697  0.312  0.980  1.0
  O  O51  1  0.697  0.188  0.480  1.0
[/CIF]
.
The material structure described by Cr(SeO2OH)(Se2O5) crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. H(1) is bonded in a single-bond geometry to one O(1) and one O(7) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(8) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(4), and one O(8) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. In the second O site, O(5) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the third O site, O(6) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the fourth O site, O(7) is bonded in a water-like geometry to one H(1) and one Se(3) atom. In the fifth O site, O(8) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one H(1), and one Se(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one Se(1) atom. In the eighth O site, O(3) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. is represented by the CIF file [CIF]
data_CrHSe3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.553
_cell_length_b   13.002
_cell_length_c   10.696
_cell_angle_alpha   90.000
_cell_angle_beta   133.072
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   767.338
_cell_formula_units_Z   4
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  0.126  0.178  0.944  1.0
  Cr  Cr1  1  0.126  0.322  0.444  1.0
  Cr  Cr2  1  0.874  0.822  0.056  1.0
  Cr  Cr3  1  0.874  0.678  0.556  1.0
  H  H4  1  0.430  0.389  0.081  1.0
  H  H5  1  0.430  0.111  0.581  1.0
  H  H6  1  0.570  0.611  0.919  1.0
  H  H7  1  0.570  0.889  0.419  1.0
  Se  Se8  1  0.654  0.299  0.564  1.0
  Se  Se9  1  0.654  0.201  0.064  1.0
  Se  Se10  1  0.346  0.701  0.436  1.0
  Se  Se11  1  0.346  0.799  0.936  1.0
  Se  Se12  1  0.997  0.137  0.579  1.0
  Se  Se13  1  0.997  0.363  0.079  1.0
  Se  Se14  1  0.003  0.863  0.421  1.0
  Se  Se15  1  0.003  0.637  0.921  1.0
  Se  Se16  1  0.287  0.010  0.222  1.0
  Se  Se17  1  0.287  0.490  0.722  1.0
  Se  Se18  1  0.713  0.990  0.778  1.0
  Se  Se19  1  0.713  0.510  0.278  1.0
  O  O20  1  0.425  0.261  0.035  1.0
  O  O21  1  0.425  0.239  0.535  1.0
  O  O22  1  0.575  0.739  0.965  1.0
  O  O23  1  0.575  0.761  0.465  1.0
  O  O24  1  0.908  0.293  0.776  1.0
  O  O25  1  0.908  0.207  0.276  1.0
  O  O26  1  0.092  0.707  0.224  1.0
  O  O27  1  0.092  0.793  0.724  1.0
  O  O28  1  0.112  0.100  0.775  1.0
  O  O29  1  0.112  0.400  0.275  1.0
  O  O30  1  0.888  0.900  0.225  1.0
  O  O31  1  0.888  0.600  0.725  1.0
  O  O32  1  0.155  0.253  0.124  1.0
  O  O33  1  0.155  0.247  0.624  1.0
  O  O34  1  0.845  0.747  0.876  1.0
  O  O35  1  0.845  0.753  0.376  1.0
  O  O36  1  0.646  0.568  0.385  1.0
  O  O37  1  0.646  0.932  0.885  1.0
  O  O38  1  0.354  0.432  0.615  1.0
  O  O39  1  0.354  0.068  0.115  1.0
  O  O40  1  0.153  0.897  0.110  1.0
  O  O41  1  0.153  0.603  0.610  1.0
  O  O42  1  0.847  0.103  0.890  1.0
  O  O43  1  0.847  0.397  0.390  1.0
  O  O44  1  0.412  0.462  0.105  1.0
  O  O45  1  0.412  0.038  0.605  1.0
  O  O46  1  0.588  0.538  0.895  1.0
  O  O47  1  0.588  0.962  0.395  1.0
  O  O48  1  0.303  0.688  0.020  1.0
  O  O49  1  0.303  0.812  0.520  1.0
  O  O50  1  0.697  0.312  0.980  1.0
  O  O51  1  0.697  0.188  0.480  1.0
[/CIF]
.