The crystal structure described by La2S2O crystallizes in the monoclinic P2_1/c space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to two equivalent S(2), four equivalent S(1), and one O(1) atom. In the second La site, La(2) is bonded in a 7-coordinate geometry to one S(1), three equivalent S(2), and three equivalent O(1) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to one La(2) and four equivalent La(1) atoms to form distorted SLa5 trigonal bipyramids that share corners with three equivalent O(1)La4 tetrahedra, corners with four equivalent S(1)La5 trigonal bipyramids, corners with nine equivalent S(2)La5 trigonal bipyramids, edges with two equivalent O(1)La4 tetrahedra,  an edgeedge with one S(2)La5 trigonal bipyramid, and edges with four equivalent S(1)La5 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent La(1) and three equivalent La(2) atoms to form distorted SLa5 trigonal bipyramids that share corners with three equivalent O(1)La4 tetrahedra, corners with two equivalent S(2)La5 trigonal bipyramids, corners with nine equivalent S(1)La5 trigonal bipyramids, edges with four equivalent O(1)La4 tetrahedra,  an edgeedge with one S(1)La5 trigonal bipyramid, and edges with three equivalent S(2)La5 trigonal bipyramids. O(1) is bonded to one La(1) and three equivalent La(2) atoms to form OLa4 tetrahedra that share corners with four equivalent O(1)La4 tetrahedra, corners with three equivalent S(1)La5 trigonal bipyramids, corners with three equivalent S(2)La5 trigonal bipyramids,  an edgeedge with one O(1)La4 tetrahedra, edges with two equivalent S(1)La5 trigonal bipyramids, and edges with four equivalent S(2)La5 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_La2S2O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.332
_cell_length_b   7.194
_cell_length_c   8.705
_cell_angle_alpha   81.954
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   454.611
_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
  La  La0  1  0.444  0.247  0.140  1.0
  La  La1  1  0.056  0.747  0.140  1.0
  La  La2  1  0.870  0.310  0.417  1.0
  La  La3  1  0.630  0.810  0.417  1.0
  La  La4  1  0.370  0.190  0.583  1.0
  La  La5  1  0.130  0.690  0.583  1.0
  La  La6  1  0.944  0.253  0.860  1.0
  La  La7  1  0.556  0.753  0.860  1.0
  S  S8  1  0.773  0.473  0.079  1.0
  S  S9  1  0.727  0.973  0.079  1.0
  S  S10  1  0.153  0.053  0.329  1.0
  S  S11  1  0.347  0.553  0.329  1.0
  S  S12  1  0.653  0.447  0.671  1.0
  S  S13  1  0.847  0.947  0.671  1.0
  S  S14  1  0.273  0.027  0.921  1.0
  S  S15  1  0.227  0.527  0.921  1.0
  O  O16  1  0.588  0.150  0.383  1.0
  O  O17  1  0.912  0.650  0.383  1.0
  O  O18  1  0.088  0.350  0.617  1.0
  O  O19  1  0.412  0.850  0.617  1.0
[/CIF]
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The crystal structure described by La2S2O crystallizes in the monoclinic P2_1/c space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to two equivalent S(2), four equivalent S(1), and one O(1) atom. In the second La site, La(2) is bonded in a 7-coordinate geometry to one S(1), three equivalent S(2), and three equivalent O(1) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to one La(2) and four equivalent La(1) atoms to form distorted SLa5 trigonal bipyramids that share corners with three equivalent O(1)La4 tetrahedra, corners with four equivalent S(1)La5 trigonal bipyramids, corners with nine equivalent S(2)La5 trigonal bipyramids, edges with two equivalent O(1)La4 tetrahedra,  an edgeedge with one S(2)La5 trigonal bipyramid, and edges with four equivalent S(1)La5 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent La(1) and three equivalent La(2) atoms to form distorted SLa5 trigonal bipyramids that share corners with three equivalent O(1)La4 tetrahedra, corners with two equivalent S(2)La5 trigonal bipyramids, corners with nine equivalent S(1)La5 trigonal bipyramids, edges with four equivalent O(1)La4 tetrahedra,  an edgeedge with one S(1)La5 trigonal bipyramid, and edges with three equivalent S(2)La5 trigonal bipyramids. O(1) is bonded to one La(1) and three equivalent La(2) atoms to form OLa4 tetrahedra that share corners with four equivalent O(1)La4 tetrahedra, corners with three equivalent S(1)La5 trigonal bipyramids, corners with three equivalent S(2)La5 trigonal bipyramids,  an edgeedge with one O(1)La4 tetrahedra, edges with two equivalent S(1)La5 trigonal bipyramids, and edges with four equivalent S(2)La5 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_La2S2O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.332
_cell_length_b   7.194
_cell_length_c   8.705
_cell_angle_alpha   81.954
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   454.611
_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
  La  La0  1  0.444  0.247  0.140  1.0
  La  La1  1  0.056  0.747  0.140  1.0
  La  La2  1  0.870  0.310  0.417  1.0
  La  La3  1  0.630  0.810  0.417  1.0
  La  La4  1  0.370  0.190  0.583  1.0
  La  La5  1  0.130  0.690  0.583  1.0
  La  La6  1  0.944  0.253  0.860  1.0
  La  La7  1  0.556  0.753  0.860  1.0
  S  S8  1  0.773  0.473  0.079  1.0
  S  S9  1  0.727  0.973  0.079  1.0
  S  S10  1  0.153  0.053  0.329  1.0
  S  S11  1  0.347  0.553  0.329  1.0
  S  S12  1  0.653  0.447  0.671  1.0
  S  S13  1  0.847  0.947  0.671  1.0
  S  S14  1  0.273  0.027  0.921  1.0
  S  S15  1  0.227  0.527  0.921  1.0
  O  O16  1  0.588  0.150  0.383  1.0
  O  O17  1  0.912  0.650  0.383  1.0
  O  O18  1  0.088  0.350  0.617  1.0
  O  O19  1  0.412  0.850  0.617  1.0
[/CIF]
.