The material 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(2), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. H(1) is bonded in a single-bond geometry to one O(2) 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(6), and one O(7) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(4), and one O(5) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Cr(1), one H(1), and one Se(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Se(2) and one Se(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Cr(1) and one Se(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CrHSe3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.162
_cell_length_b   7.635
_cell_length_c   10.761
_cell_angle_alpha   48.896
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   752.908
_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  0.325  0.756  0.624  1.0
  Cr  Cr1  1  0.825  0.244  0.876  1.0
  Cr  Cr2  1  0.175  0.756  0.124  1.0
  Cr  Cr3  1  0.675  0.244  0.376  1.0
  H  H4  1  0.819  0.309  0.153  1.0
  H  H5  1  0.319  0.691  0.347  1.0
  H  H6  1  0.681  0.309  0.653  1.0
  H  H7  1  0.181  0.691  0.847  1.0
  Se  Se8  1  0.658  0.485  0.977  1.0
  Se  Se9  1  0.874  0.860  0.580  1.0
  Se  Se10  1  0.547  0.843  0.409  1.0
  Se  Se11  1  0.047  0.157  0.091  1.0
  Se  Se12  1  0.374  0.140  0.920  1.0
  Se  Se13  1  0.158  0.515  0.523  1.0
  Se  Se14  1  0.842  0.485  0.477  1.0
  Se  Se15  1  0.626  0.860  0.080  1.0
  Se  Se16  1  0.953  0.843  0.909  1.0
  Se  Se17  1  0.453  0.157  0.591  1.0
  Se  Se18  1  0.126  0.140  0.420  1.0
  Se  Se19  1  0.342  0.515  0.023  1.0
  O  O20  1  0.263  0.285  0.124  1.0
  O  O21  1  0.741  0.281  0.185  1.0
  O  O22  1  0.043  0.098  0.284  1.0
  O  O23  1  0.409  0.773  0.453  1.0
  O  O24  1  0.546  0.124  0.332  1.0
  O  O25  1  0.737  0.914  0.550  1.0
  O  O26  1  0.388  0.429  0.804  1.0
  O  O27  1  0.185  0.656  0.595  1.0
  O  O28  1  0.685  0.344  0.905  1.0
  O  O29  1  0.888  0.571  0.696  1.0
  O  O30  1  0.237  0.086  0.950  1.0
  O  O31  1  0.046  0.876  0.168  1.0
  O  O32  1  0.909  0.227  0.047  1.0
  O  O33  1  0.543  0.902  0.216  1.0
  O  O34  1  0.241  0.719  0.315  1.0
  O  O35  1  0.763  0.715  0.376  1.0
  O  O36  1  0.237  0.285  0.624  1.0
  O  O37  1  0.759  0.281  0.685  1.0
  O  O38  1  0.457  0.098  0.784  1.0
  O  O39  1  0.091  0.773  0.953  1.0
  O  O40  1  0.954  0.124  0.832  1.0
  O  O41  1  0.763  0.914  0.050  1.0
  O  O42  1  0.112  0.429  0.304  1.0
  O  O43  1  0.315  0.656  0.095  1.0
  O  O44  1  0.815  0.344  0.405  1.0
  O  O45  1  0.612  0.571  0.196  1.0
  O  O46  1  0.263  0.086  0.450  1.0
  O  O47  1  0.454  0.876  0.668  1.0
  O  O48  1  0.591  0.227  0.547  1.0
  O  O49  1  0.957  0.902  0.716  1.0
  O  O50  1  0.259  0.719  0.815  1.0
  O  O51  1  0.737  0.715  0.876  1.0
[/CIF]
.
The material 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(2), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. H(1) is bonded in a single-bond geometry to one O(2) 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(6), and one O(7) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(4), and one O(5) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Cr(1), one H(1), and one Se(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Se(2) and one Se(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Cr(1) and one Se(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CrHSe3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.162
_cell_length_b   7.635
_cell_length_c   10.761
_cell_angle_alpha   48.896
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   752.908
_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  0.325  0.756  0.624  1.0
  Cr  Cr1  1  0.825  0.244  0.876  1.0
  Cr  Cr2  1  0.175  0.756  0.124  1.0
  Cr  Cr3  1  0.675  0.244  0.376  1.0
  H  H4  1  0.819  0.309  0.153  1.0
  H  H5  1  0.319  0.691  0.347  1.0
  H  H6  1  0.681  0.309  0.653  1.0
  H  H7  1  0.181  0.691  0.847  1.0
  Se  Se8  1  0.658  0.485  0.977  1.0
  Se  Se9  1  0.874  0.860  0.580  1.0
  Se  Se10  1  0.547  0.843  0.409  1.0
  Se  Se11  1  0.047  0.157  0.091  1.0
  Se  Se12  1  0.374  0.140  0.920  1.0
  Se  Se13  1  0.158  0.515  0.523  1.0
  Se  Se14  1  0.842  0.485  0.477  1.0
  Se  Se15  1  0.626  0.860  0.080  1.0
  Se  Se16  1  0.953  0.843  0.909  1.0
  Se  Se17  1  0.453  0.157  0.591  1.0
  Se  Se18  1  0.126  0.140  0.420  1.0
  Se  Se19  1  0.342  0.515  0.023  1.0
  O  O20  1  0.263  0.285  0.124  1.0
  O  O21  1  0.741  0.281  0.185  1.0
  O  O22  1  0.043  0.098  0.284  1.0
  O  O23  1  0.409  0.773  0.453  1.0
  O  O24  1  0.546  0.124  0.332  1.0
  O  O25  1  0.737  0.914  0.550  1.0
  O  O26  1  0.388  0.429  0.804  1.0
  O  O27  1  0.185  0.656  0.595  1.0
  O  O28  1  0.685  0.344  0.905  1.0
  O  O29  1  0.888  0.571  0.696  1.0
  O  O30  1  0.237  0.086  0.950  1.0
  O  O31  1  0.046  0.876  0.168  1.0
  O  O32  1  0.909  0.227  0.047  1.0
  O  O33  1  0.543  0.902  0.216  1.0
  O  O34  1  0.241  0.719  0.315  1.0
  O  O35  1  0.763  0.715  0.376  1.0
  O  O36  1  0.237  0.285  0.624  1.0
  O  O37  1  0.759  0.281  0.685  1.0
  O  O38  1  0.457  0.098  0.784  1.0
  O  O39  1  0.091  0.773  0.953  1.0
  O  O40  1  0.954  0.124  0.832  1.0
  O  O41  1  0.763  0.914  0.050  1.0
  O  O42  1  0.112  0.429  0.304  1.0
  O  O43  1  0.315  0.656  0.095  1.0
  O  O44  1  0.815  0.344  0.405  1.0
  O  O45  1  0.612  0.571  0.196  1.0
  O  O46  1  0.263  0.086  0.450  1.0
  O  O47  1  0.454  0.876  0.668  1.0
  O  O48  1  0.591  0.227  0.547  1.0
  O  O49  1  0.957  0.902  0.716  1.0
  O  O50  1  0.259  0.719  0.815  1.0
  O  O51  1  0.737  0.715  0.876  1.0
[/CIF]
.