The structure described by SmBiW2O9 crystallizes in the orthorhombic Pnma space group. Sm(1) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), and four equivalent O(3) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(5), two equivalent O(3), and two equivalent O(6) atoms to form corner-sharing WO5 trigonal bipyramids. In the second W site, W(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 13°. Bi(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are six inequivalent O sites. In the first O site, O(3) is bonded in a trigonal planar geometry to two equivalent Sm(1) and one W(1) atom. In the second O site, O(4) is bonded in a linear geometry to two equivalent W(2) atoms. In the third O site, O(5) is bonded in a linear geometry to one Sm(1) and one W(1) atom. In the fourth O site, O(1) is bonded to one W(2) and three equivalent Bi(1) atoms to form a mixture of corner and edge-sharing OBi3W tetrahedra. In the fifth O site, O(6) is bonded in a linear geometry to two equivalent W(1) atoms. In the sixth O site, O(2) is bonded in a linear geometry to one Sm(1) and one W(2) atom. is represented by the CIF card [CIF]
data_SmBiW2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.937
_cell_length_b   5.813
_cell_length_c   33.342
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   763.030
_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
  Sm  Sm0  1  0.739  0.250  0.334  1.0
  Sm  Sm1  1  0.761  0.250  0.834  1.0
  Sm  Sm2  1  0.261  0.750  0.666  1.0
  Sm  Sm3  1  0.239  0.750  0.166  1.0
  Bi  Bi4  1  0.717  0.750  0.526  1.0
  Bi  Bi5  1  0.783  0.750  0.026  1.0
  Bi  Bi6  1  0.283  0.250  0.474  1.0
  Bi  Bi7  1  0.217  0.250  0.974  1.0
  W  W8  1  0.271  0.750  0.293  1.0
  W  W9  1  0.229  0.750  0.793  1.0
  W  W10  1  0.729  0.250  0.707  1.0
  W  W11  1  0.771  0.250  0.207  1.0
  W  W12  1  0.766  0.750  0.422  1.0
  W  W13  1  0.734  0.750  0.922  1.0
  W  W14  1  0.234  0.250  0.578  1.0
  W  W15  1  0.266  0.250  0.078  1.0
  O  O16  1  0.743  0.521  0.471  1.0
  O  O17  1  0.757  0.979  0.971  1.0
  O  O18  1  0.257  0.021  0.529  1.0
  O  O19  1  0.243  0.479  0.029  1.0
  O  O20  1  0.257  0.479  0.529  1.0
  O  O21  1  0.243  0.021  0.029  1.0
  O  O22  1  0.743  0.979  0.471  1.0
  O  O23  1  0.757  0.521  0.971  1.0
  O  O24  1  0.742  0.504  0.388  1.0
  O  O25  1  0.758  0.996  0.888  1.0
  O  O26  1  0.258  0.004  0.612  1.0
  O  O27  1  0.242  0.496  0.112  1.0
  O  O28  1  0.258  0.496  0.612  1.0
  O  O29  1  0.242  0.004  0.112  1.0
  O  O30  1  0.742  0.996  0.388  1.0
  O  O31  1  0.758  0.504  0.888  1.0
  O  O32  1  0.238  0.026  0.321  1.0
  O  O33  1  0.262  0.474  0.821  1.0
  O  O34  1  0.762  0.526  0.679  1.0
  O  O35  1  0.738  0.974  0.179  1.0
  O  O36  1  0.762  0.974  0.679  1.0
  O  O37  1  0.738  0.526  0.179  1.0
  O  O38  1  0.238  0.474  0.321  1.0
  O  O39  1  0.262  0.026  0.821  1.0
  O  O40  1  0.248  0.750  0.428  1.0
  O  O41  1  0.252  0.750  0.928  1.0
  O  O42  1  0.752  0.250  0.572  1.0
  O  O43  1  0.748  0.250  0.072  1.0
  O  O44  1  0.736  0.250  0.261  1.0
  O  O45  1  0.764  0.250  0.761  1.0
  O  O46  1  0.264  0.750  0.739  1.0
  O  O47  1  0.236  0.750  0.239  1.0
  O  O48  1  0.748  0.750  0.297  1.0
  O  O49  1  0.752  0.750  0.797  1.0
  O  O50  1  0.252  0.250  0.703  1.0
  O  O51  1  0.248  0.250  0.203  1.0
[/CIF]
.
The structure described by SmBiW2O9 crystallizes in the orthorhombic Pnma space group. Sm(1) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), and four equivalent O(3) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(5), two equivalent O(3), and two equivalent O(6) atoms to form corner-sharing WO5 trigonal bipyramids. In the second W site, W(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 13°. Bi(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are six inequivalent O sites. In the first O site, O(3) is bonded in a trigonal planar geometry to two equivalent Sm(1) and one W(1) atom. In the second O site, O(4) is bonded in a linear geometry to two equivalent W(2) atoms. In the third O site, O(5) is bonded in a linear geometry to one Sm(1) and one W(1) atom. In the fourth O site, O(1) is bonded to one W(2) and three equivalent Bi(1) atoms to form a mixture of corner and edge-sharing OBi3W tetrahedra. In the fifth O site, O(6) is bonded in a linear geometry to two equivalent W(1) atoms. In the sixth O site, O(2) is bonded in a linear geometry to one Sm(1) and one W(2) atom. is represented by the CIF card [CIF]
data_SmBiW2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.937
_cell_length_b   5.813
_cell_length_c   33.342
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   763.030
_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
  Sm  Sm0  1  0.739  0.250  0.334  1.0
  Sm  Sm1  1  0.761  0.250  0.834  1.0
  Sm  Sm2  1  0.261  0.750  0.666  1.0
  Sm  Sm3  1  0.239  0.750  0.166  1.0
  Bi  Bi4  1  0.717  0.750  0.526  1.0
  Bi  Bi5  1  0.783  0.750  0.026  1.0
  Bi  Bi6  1  0.283  0.250  0.474  1.0
  Bi  Bi7  1  0.217  0.250  0.974  1.0
  W  W8  1  0.271  0.750  0.293  1.0
  W  W9  1  0.229  0.750  0.793  1.0
  W  W10  1  0.729  0.250  0.707  1.0
  W  W11  1  0.771  0.250  0.207  1.0
  W  W12  1  0.766  0.750  0.422  1.0
  W  W13  1  0.734  0.750  0.922  1.0
  W  W14  1  0.234  0.250  0.578  1.0
  W  W15  1  0.266  0.250  0.078  1.0
  O  O16  1  0.743  0.521  0.471  1.0
  O  O17  1  0.757  0.979  0.971  1.0
  O  O18  1  0.257  0.021  0.529  1.0
  O  O19  1  0.243  0.479  0.029  1.0
  O  O20  1  0.257  0.479  0.529  1.0
  O  O21  1  0.243  0.021  0.029  1.0
  O  O22  1  0.743  0.979  0.471  1.0
  O  O23  1  0.757  0.521  0.971  1.0
  O  O24  1  0.742  0.504  0.388  1.0
  O  O25  1  0.758  0.996  0.888  1.0
  O  O26  1  0.258  0.004  0.612  1.0
  O  O27  1  0.242  0.496  0.112  1.0
  O  O28  1  0.258  0.496  0.612  1.0
  O  O29  1  0.242  0.004  0.112  1.0
  O  O30  1  0.742  0.996  0.388  1.0
  O  O31  1  0.758  0.504  0.888  1.0
  O  O32  1  0.238  0.026  0.321  1.0
  O  O33  1  0.262  0.474  0.821  1.0
  O  O34  1  0.762  0.526  0.679  1.0
  O  O35  1  0.738  0.974  0.179  1.0
  O  O36  1  0.762  0.974  0.679  1.0
  O  O37  1  0.738  0.526  0.179  1.0
  O  O38  1  0.238  0.474  0.321  1.0
  O  O39  1  0.262  0.026  0.821  1.0
  O  O40  1  0.248  0.750  0.428  1.0
  O  O41  1  0.252  0.750  0.928  1.0
  O  O42  1  0.752  0.250  0.572  1.0
  O  O43  1  0.748  0.250  0.072  1.0
  O  O44  1  0.736  0.250  0.261  1.0
  O  O45  1  0.764  0.250  0.761  1.0
  O  O46  1  0.264  0.750  0.739  1.0
  O  O47  1  0.236  0.750  0.239  1.0
  O  O48  1  0.748  0.750  0.297  1.0
  O  O49  1  0.752  0.750  0.797  1.0
  O  O50  1  0.252  0.250  0.703  1.0
  O  O51  1  0.248  0.250  0.203  1.0
[/CIF]
.