The crystal structure described by Sm2Cu(SeO3)4 crystallizes in the monoclinic P2_1/c space group. Sm(1) is bonded in a 10-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), two equivalent O(4), and three equivalent O(1) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(6) atoms. 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 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 120 degrees geometry to one Cu(1) and one Se(2) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Sm(1) and one Se(1) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Sm(1) and one Se(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(1) and one Se(1) atom. In the fifth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Sm(1) and one Se(2) atom. In the sixth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sm(1), one Cu(1), and one Se(2) atom. is represented by the CIF file [CIF]
data_Sm2Cu(SeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.037
_cell_length_b   8.258
_cell_length_c   10.818
_cell_angle_alpha   70.054
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   590.968
_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
  Sm  Sm0  1  0.663  0.761  0.584  1.0
  Sm  Sm1  1  0.163  0.739  0.416  1.0
  Sm  Sm2  1  0.337  0.239  0.416  1.0
  Sm  Sm3  1  0.837  0.261  0.584  1.0
  Cu  Cu4  1  0.500  0.500  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.000  1.0
  Se  Se6  1  0.823  0.135  0.317  1.0
  Se  Se7  1  0.323  0.365  0.683  1.0
  Se  Se8  1  0.672  0.876  0.865  1.0
  Se  Se9  1  0.172  0.624  0.135  1.0
  Se  Se10  1  0.328  0.124  0.135  1.0
  Se  Se11  1  0.828  0.376  0.865  1.0
  Se  Se12  1  0.677  0.635  0.317  1.0
  Se  Se13  1  0.177  0.865  0.683  1.0
  O  O14  1  0.346  0.911  0.556  1.0
  O  O15  1  0.846  0.589  0.444  1.0
  O  O16  1  0.654  0.089  0.444  1.0
  O  O17  1  0.154  0.411  0.556  1.0
  O  O18  1  0.113  0.074  0.656  1.0
  O  O19  1  0.613  0.426  0.344  1.0
  O  O20  1  0.887  0.926  0.344  1.0
  O  O21  1  0.387  0.574  0.656  1.0
  O  O22  1  0.507  0.721  0.393  1.0
  O  O23  1  0.007  0.779  0.607  1.0
  O  O24  1  0.778  0.469  0.700  1.0
  O  O25  1  0.278  0.031  0.300  1.0
  O  O26  1  0.222  0.531  0.300  1.0
  O  O27  1  0.722  0.969  0.700  1.0
  O  O28  1  0.882  0.177  0.848  1.0
  O  O29  1  0.382  0.323  0.152  1.0
  O  O30  1  0.118  0.823  0.152  1.0
  O  O31  1  0.618  0.677  0.848  1.0
  O  O32  1  0.891  0.823  0.942  1.0
  O  O33  1  0.391  0.677  0.058  1.0
  O  O34  1  0.109  0.177  0.058  1.0
  O  O35  1  0.609  0.323  0.942  1.0
  O  O36  1  0.493  0.279  0.607  1.0
  O  O37  1  0.993  0.221  0.393  1.0
[/CIF]
.
The crystal structure described by Sm2Cu(SeO3)4 crystallizes in the monoclinic P2_1/c space group. Sm(1) is bonded in a 10-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), two equivalent O(4), and three equivalent O(1) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(6) atoms. 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 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 120 degrees geometry to one Cu(1) and one Se(2) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Sm(1) and one Se(1) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Sm(1) and one Se(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(1) and one Se(1) atom. In the fifth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Sm(1) and one Se(2) atom. In the sixth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sm(1), one Cu(1), and one Se(2) atom. is represented by the CIF file [CIF]
data_Sm2Cu(SeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.037
_cell_length_b   8.258
_cell_length_c   10.818
_cell_angle_alpha   70.054
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   590.968
_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
  Sm  Sm0  1  0.663  0.761  0.584  1.0
  Sm  Sm1  1  0.163  0.739  0.416  1.0
  Sm  Sm2  1  0.337  0.239  0.416  1.0
  Sm  Sm3  1  0.837  0.261  0.584  1.0
  Cu  Cu4  1  0.500  0.500  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.000  1.0
  Se  Se6  1  0.823  0.135  0.317  1.0
  Se  Se7  1  0.323  0.365  0.683  1.0
  Se  Se8  1  0.672  0.876  0.865  1.0
  Se  Se9  1  0.172  0.624  0.135  1.0
  Se  Se10  1  0.328  0.124  0.135  1.0
  Se  Se11  1  0.828  0.376  0.865  1.0
  Se  Se12  1  0.677  0.635  0.317  1.0
  Se  Se13  1  0.177  0.865  0.683  1.0
  O  O14  1  0.346  0.911  0.556  1.0
  O  O15  1  0.846  0.589  0.444  1.0
  O  O16  1  0.654  0.089  0.444  1.0
  O  O17  1  0.154  0.411  0.556  1.0
  O  O18  1  0.113  0.074  0.656  1.0
  O  O19  1  0.613  0.426  0.344  1.0
  O  O20  1  0.887  0.926  0.344  1.0
  O  O21  1  0.387  0.574  0.656  1.0
  O  O22  1  0.507  0.721  0.393  1.0
  O  O23  1  0.007  0.779  0.607  1.0
  O  O24  1  0.778  0.469  0.700  1.0
  O  O25  1  0.278  0.031  0.300  1.0
  O  O26  1  0.222  0.531  0.300  1.0
  O  O27  1  0.722  0.969  0.700  1.0
  O  O28  1  0.882  0.177  0.848  1.0
  O  O29  1  0.382  0.323  0.152  1.0
  O  O30  1  0.118  0.823  0.152  1.0
  O  O31  1  0.618  0.677  0.848  1.0
  O  O32  1  0.891  0.823  0.942  1.0
  O  O33  1  0.391  0.677  0.058  1.0
  O  O34  1  0.109  0.177  0.058  1.0
  O  O35  1  0.609  0.323  0.942  1.0
  O  O36  1  0.493  0.279  0.607  1.0
  O  O37  1  0.993  0.221  0.393  1.0
[/CIF]
.