The material described by LiCeS2O9 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(1), one O(7), and two equivalent O(5) atoms to form LiO4 tetrahedra that share  a cornercorner with one S(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, and corners with three equivalent S(2)O4 tetrahedra. Ce(1) is bonded in a 9-coordinate geometry to one O(3), one O(4), one O(6), one O(7), one O(9), two equivalent O(2), and two equivalent O(8) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra. In the second S site, S(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share corners with three equivalent Li(1)O4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to two equivalent Li(1) and one S(2) atom. In the second O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one S(2) atom. In the third O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Li(1), one Ce(1), and one S(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Ce(1) and one S(2) atom. In the fifth O site, O(1) is bonded in a bent 120 degrees geometry to one Li(1) and one S(1) atom. In the sixth O site, O(9) is bonded in a single-bond geometry to one Ce(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Ce(1) and one S(1) atom. In the eighth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one S(1) atom. In the ninth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one S(1) atom. is represented by the CIF file [CIF]
data_LiCeS2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.648
_cell_length_b   8.183
_cell_length_c   18.319
_cell_angle_alpha   97.947
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   690.089
_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
  Li  Li0  1  0.932  0.114  0.294  1.0
  Li  Li1  1  0.432  0.886  0.206  1.0
  Li  Li2  1  0.068  0.886  0.706  1.0
  Li  Li3  1  0.568  0.114  0.794  1.0
  Ce  Ce4  1  0.513  0.617  0.399  1.0
  Ce  Ce5  1  0.013  0.383  0.101  1.0
  Ce  Ce6  1  0.487  0.383  0.601  1.0
  Ce  Ce7  1  0.987  0.617  0.899  1.0
  S  S8  1  0.966  0.291  0.447  1.0
  S  S9  1  0.466  0.709  0.053  1.0
  S  S10  1  0.034  0.709  0.553  1.0
  S  S11  1  0.534  0.291  0.947  1.0
  S  S12  1  0.948  0.725  0.264  1.0
  S  S13  1  0.448  0.275  0.236  1.0
  S  S14  1  0.052  0.275  0.736  1.0
  S  S15  1  0.552  0.725  0.764  1.0
  O  O16  1  0.929  0.133  0.401  1.0
  O  O17  1  0.429  0.867  0.099  1.0
  O  O18  1  0.071  0.867  0.599  1.0
  O  O19  1  0.571  0.133  0.901  1.0
  O  O20  1  0.676  0.369  0.470  1.0
  O  O21  1  0.176  0.631  0.030  1.0
  O  O22  1  0.324  0.631  0.530  1.0
  O  O23  1  0.824  0.369  0.970  1.0
  O  O24  1  0.122  0.272  0.517  1.0
  O  O25  1  0.622  0.728  0.983  1.0
  O  O26  1  0.878  0.728  0.483  1.0
  O  O27  1  0.378  0.272  0.017  1.0
  O  O28  1  0.114  0.413  0.407  1.0
  O  O29  1  0.614  0.587  0.093  1.0
  O  O30  1  0.886  0.587  0.593  1.0
  O  O31  1  0.386  0.413  0.907  1.0
  O  O32  1  0.063  0.890  0.256  1.0
  O  O33  1  0.563  0.110  0.244  1.0
  O  O34  1  0.937  0.110  0.744  1.0
  O  O35  1  0.437  0.890  0.756  1.0
  O  O36  1  0.052  0.605  0.202  1.0
  O  O37  1  0.552  0.395  0.298  1.0
  O  O38  1  0.948  0.395  0.798  1.0
  O  O39  1  0.448  0.605  0.702  1.0
  O  O40  1  0.629  0.730  0.269  1.0
  O  O41  1  0.129  0.270  0.231  1.0
  O  O42  1  0.371  0.270  0.731  1.0
  O  O43  1  0.871  0.730  0.769  1.0
  O  O44  1  0.049  0.672  0.336  1.0
  O  O45  1  0.549  0.328  0.164  1.0
  O  O46  1  0.951  0.328  0.664  1.0
  O  O47  1  0.451  0.672  0.836  1.0
  O  O48  1  0.937  0.136  0.082  1.0
  O  O49  1  0.437  0.864  0.418  1.0
  O  O50  1  0.063  0.864  0.918  1.0
  O  O51  1  0.563  0.136  0.582  1.0
[/CIF]
.
The material described by LiCeS2O9 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(1), one O(7), and two equivalent O(5) atoms to form LiO4 tetrahedra that share  a cornercorner with one S(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, and corners with three equivalent S(2)O4 tetrahedra. Ce(1) is bonded in a 9-coordinate geometry to one O(3), one O(4), one O(6), one O(7), one O(9), two equivalent O(2), and two equivalent O(8) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra. In the second S site, S(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share corners with three equivalent Li(1)O4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to two equivalent Li(1) and one S(2) atom. In the second O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one S(2) atom. In the third O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Li(1), one Ce(1), and one S(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Ce(1) and one S(2) atom. In the fifth O site, O(1) is bonded in a bent 120 degrees geometry to one Li(1) and one S(1) atom. In the sixth O site, O(9) is bonded in a single-bond geometry to one Ce(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Ce(1) and one S(1) atom. In the eighth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one S(1) atom. In the ninth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one S(1) atom. is represented by the CIF file [CIF]
data_LiCeS2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.648
_cell_length_b   8.183
_cell_length_c   18.319
_cell_angle_alpha   97.947
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   690.089
_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
  Li  Li0  1  0.932  0.114  0.294  1.0
  Li  Li1  1  0.432  0.886  0.206  1.0
  Li  Li2  1  0.068  0.886  0.706  1.0
  Li  Li3  1  0.568  0.114  0.794  1.0
  Ce  Ce4  1  0.513  0.617  0.399  1.0
  Ce  Ce5  1  0.013  0.383  0.101  1.0
  Ce  Ce6  1  0.487  0.383  0.601  1.0
  Ce  Ce7  1  0.987  0.617  0.899  1.0
  S  S8  1  0.966  0.291  0.447  1.0
  S  S9  1  0.466  0.709  0.053  1.0
  S  S10  1  0.034  0.709  0.553  1.0
  S  S11  1  0.534  0.291  0.947  1.0
  S  S12  1  0.948  0.725  0.264  1.0
  S  S13  1  0.448  0.275  0.236  1.0
  S  S14  1  0.052  0.275  0.736  1.0
  S  S15  1  0.552  0.725  0.764  1.0
  O  O16  1  0.929  0.133  0.401  1.0
  O  O17  1  0.429  0.867  0.099  1.0
  O  O18  1  0.071  0.867  0.599  1.0
  O  O19  1  0.571  0.133  0.901  1.0
  O  O20  1  0.676  0.369  0.470  1.0
  O  O21  1  0.176  0.631  0.030  1.0
  O  O22  1  0.324  0.631  0.530  1.0
  O  O23  1  0.824  0.369  0.970  1.0
  O  O24  1  0.122  0.272  0.517  1.0
  O  O25  1  0.622  0.728  0.983  1.0
  O  O26  1  0.878  0.728  0.483  1.0
  O  O27  1  0.378  0.272  0.017  1.0
  O  O28  1  0.114  0.413  0.407  1.0
  O  O29  1  0.614  0.587  0.093  1.0
  O  O30  1  0.886  0.587  0.593  1.0
  O  O31  1  0.386  0.413  0.907  1.0
  O  O32  1  0.063  0.890  0.256  1.0
  O  O33  1  0.563  0.110  0.244  1.0
  O  O34  1  0.937  0.110  0.744  1.0
  O  O35  1  0.437  0.890  0.756  1.0
  O  O36  1  0.052  0.605  0.202  1.0
  O  O37  1  0.552  0.395  0.298  1.0
  O  O38  1  0.948  0.395  0.798  1.0
  O  O39  1  0.448  0.605  0.702  1.0
  O  O40  1  0.629  0.730  0.269  1.0
  O  O41  1  0.129  0.270  0.231  1.0
  O  O42  1  0.371  0.270  0.731  1.0
  O  O43  1  0.871  0.730  0.769  1.0
  O  O44  1  0.049  0.672  0.336  1.0
  O  O45  1  0.549  0.328  0.164  1.0
  O  O46  1  0.951  0.328  0.664  1.0
  O  O47  1  0.451  0.672  0.836  1.0
  O  O48  1  0.937  0.136  0.082  1.0
  O  O49  1  0.437  0.864  0.418  1.0
  O  O50  1  0.063  0.864  0.918  1.0
  O  O51  1  0.563  0.136  0.582  1.0
[/CIF]
.