The compound described by Fe(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to one O(1), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form edge-sharing FeO6 octahedra. There are two 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(3) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(2) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Fe(1) and one Se(1) atom. In the third O site, O(2) is bonded in a single-bond geometry to one Se(1) atom. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(1) atom. In the fifth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1) and one Se(2) atom. In the sixth O site, O(5) is bonded in a trigonal non-coplanar geometry to two equivalent Fe(1) and one Se(2) atom. is represented by the CIF file [CIF]
data_Fe(SeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.041
_cell_length_b   6.634
_cell_length_c   8.179
_cell_angle_alpha   89.413
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   544.783
_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
  Fe  Fe0  1  0.506  0.552  0.302  1.0
  Fe  Fe1  1  0.006  0.448  0.198  1.0
  Fe  Fe2  1  0.494  0.448  0.698  1.0
  Fe  Fe3  1  0.994  0.552  0.802  1.0
  Se  Se4  1  0.917  0.940  0.220  1.0
  Se  Se5  1  0.417  0.060  0.280  1.0
  Se  Se6  1  0.083  0.060  0.780  1.0
  Se  Se7  1  0.583  0.940  0.720  1.0
  Se  Se8  1  0.711  0.408  0.022  1.0
  Se  Se9  1  0.211  0.592  0.478  1.0
  Se  Se10  1  0.289  0.592  0.978  1.0
  Se  Se11  1  0.789  0.408  0.522  1.0
  O  O12  1  0.034  0.754  0.230  1.0
  O  O13  1  0.534  0.246  0.270  1.0
  O  O14  1  0.966  0.246  0.770  1.0
  O  O15  1  0.466  0.754  0.730  1.0
  O  O16  1  0.851  0.979  0.404  1.0
  O  O17  1  0.351  0.021  0.096  1.0
  O  O18  1  0.149  0.021  0.596  1.0
  O  O19  1  0.649  0.979  0.904  1.0
  O  O20  1  0.003  0.147  0.150  1.0
  O  O21  1  0.503  0.853  0.350  1.0
  O  O22  1  0.997  0.853  0.850  1.0
  O  O23  1  0.497  0.147  0.650  1.0
  O  O24  1  0.625  0.599  0.114  1.0
  O  O25  1  0.125  0.401  0.386  1.0
  O  O26  1  0.375  0.401  0.886  1.0
  O  O27  1  0.875  0.599  0.614  1.0
  O  O28  1  0.872  0.521  0.003  1.0
  O  O29  1  0.372  0.479  0.497  1.0
  O  O30  1  0.128  0.479  0.997  1.0
  O  O31  1  0.628  0.521  0.503  1.0
  O  O32  1  0.663  0.438  0.822  1.0
  O  O33  1  0.163  0.562  0.678  1.0
  O  O34  1  0.337  0.562  0.178  1.0
  O  O35  1  0.837  0.438  0.322  1.0
[/CIF]
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The compound described by Fe(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to one O(1), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form edge-sharing FeO6 octahedra. There are two 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(3) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(2) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Fe(1) and one Se(1) atom. In the third O site, O(2) is bonded in a single-bond geometry to one Se(1) atom. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(1) atom. In the fifth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1) and one Se(2) atom. In the sixth O site, O(5) is bonded in a trigonal non-coplanar geometry to two equivalent Fe(1) and one Se(2) atom. is represented by the CIF file [CIF]
data_Fe(SeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.041
_cell_length_b   6.634
_cell_length_c   8.179
_cell_angle_alpha   89.413
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   544.783
_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
  Fe  Fe0  1  0.506  0.552  0.302  1.0
  Fe  Fe1  1  0.006  0.448  0.198  1.0
  Fe  Fe2  1  0.494  0.448  0.698  1.0
  Fe  Fe3  1  0.994  0.552  0.802  1.0
  Se  Se4  1  0.917  0.940  0.220  1.0
  Se  Se5  1  0.417  0.060  0.280  1.0
  Se  Se6  1  0.083  0.060  0.780  1.0
  Se  Se7  1  0.583  0.940  0.720  1.0
  Se  Se8  1  0.711  0.408  0.022  1.0
  Se  Se9  1  0.211  0.592  0.478  1.0
  Se  Se10  1  0.289  0.592  0.978  1.0
  Se  Se11  1  0.789  0.408  0.522  1.0
  O  O12  1  0.034  0.754  0.230  1.0
  O  O13  1  0.534  0.246  0.270  1.0
  O  O14  1  0.966  0.246  0.770  1.0
  O  O15  1  0.466  0.754  0.730  1.0
  O  O16  1  0.851  0.979  0.404  1.0
  O  O17  1  0.351  0.021  0.096  1.0
  O  O18  1  0.149  0.021  0.596  1.0
  O  O19  1  0.649  0.979  0.904  1.0
  O  O20  1  0.003  0.147  0.150  1.0
  O  O21  1  0.503  0.853  0.350  1.0
  O  O22  1  0.997  0.853  0.850  1.0
  O  O23  1  0.497  0.147  0.650  1.0
  O  O24  1  0.625  0.599  0.114  1.0
  O  O25  1  0.125  0.401  0.386  1.0
  O  O26  1  0.375  0.401  0.886  1.0
  O  O27  1  0.875  0.599  0.614  1.0
  O  O28  1  0.872  0.521  0.003  1.0
  O  O29  1  0.372  0.479  0.497  1.0
  O  O30  1  0.128  0.479  0.997  1.0
  O  O31  1  0.628  0.521  0.503  1.0
  O  O32  1  0.663  0.438  0.822  1.0
  O  O33  1  0.163  0.562  0.678  1.0
  O  O34  1  0.337  0.562  0.178  1.0
  O  O35  1  0.837  0.438  0.322  1.0
[/CIF]
.