The structure described by La3Si2O8Cl crystallizes in the monoclinic C2/c space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(4), four equivalent O(2), and one Cl(1) atom. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(4), three equivalent O(3), and one Cl(1) atom. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one La(1), two equivalent La(2), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one La(2), two equivalent La(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to three equivalent La(2) and one Si(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one La(1), two equivalent La(2), and one Si(1) atom. Cl(1) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent La(2) atoms. is represented by the CIF file [CIF]
data_La3Si2ClO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.030
_cell_length_b   8.030
_cell_length_c   8.907
_cell_angle_alpha   82.566
_cell_angle_beta   82.566
_cell_angle_gamma   48.266
_symmetry_Int_Tables_number   1
_cell_volume   424.232
_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
  La  La0  1  0.931  0.069  0.750  1.0
  La  La1  1  0.420  0.212  0.171  1.0
  La  La2  1  0.788  0.580  0.329  1.0
  La  La3  1  0.580  0.788  0.829  1.0
  La  La4  1  0.212  0.420  0.671  1.0
  La  La5  1  0.069  0.931  0.250  1.0
  Si  Si6  1  0.102  0.215  0.974  1.0
  Si  Si7  1  0.898  0.785  0.026  1.0
  Si  Si8  1  0.785  0.898  0.526  1.0
  Si  Si9  1  0.215  0.102  0.474  1.0
  Cl  Cl10  1  0.475  0.525  0.750  1.0
  Cl  Cl11  1  0.525  0.475  0.250  1.0
  O  O12  1  0.381  0.907  0.353  1.0
  O  O13  1  0.957  0.200  0.467  1.0
  O  O14  1  0.797  0.685  0.581  1.0
  O  O15  1  0.685  0.797  0.081  1.0
  O  O16  1  0.800  0.043  0.033  1.0
  O  O17  1  0.907  0.381  0.853  1.0
  O  O18  1  0.619  0.093  0.647  1.0
  O  O19  1  0.728  0.964  0.348  1.0
  O  O20  1  0.272  0.036  0.652  1.0
  O  O21  1  0.964  0.728  0.848  1.0
  O  O22  1  0.315  0.203  0.919  1.0
  O  O23  1  0.043  0.800  0.533  1.0
  O  O24  1  0.203  0.315  0.419  1.0
  O  O25  1  0.200  0.957  0.967  1.0
  O  O26  1  0.093  0.619  0.147  1.0
  O  O27  1  0.036  0.272  0.152  1.0
[/CIF]
.
The structure described by La3Si2O8Cl crystallizes in the monoclinic C2/c space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(4), four equivalent O(2), and one Cl(1) atom. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(4), three equivalent O(3), and one Cl(1) atom. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one La(1), two equivalent La(2), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one La(2), two equivalent La(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to three equivalent La(2) and one Si(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one La(1), two equivalent La(2), and one Si(1) atom. Cl(1) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent La(2) atoms. is represented by the CIF file [CIF]
data_La3Si2ClO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.030
_cell_length_b   8.030
_cell_length_c   8.907
_cell_angle_alpha   82.566
_cell_angle_beta   82.566
_cell_angle_gamma   48.266
_symmetry_Int_Tables_number   1
_cell_volume   424.232
_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
  La  La0  1  0.931  0.069  0.750  1.0
  La  La1  1  0.420  0.212  0.171  1.0
  La  La2  1  0.788  0.580  0.329  1.0
  La  La3  1  0.580  0.788  0.829  1.0
  La  La4  1  0.212  0.420  0.671  1.0
  La  La5  1  0.069  0.931  0.250  1.0
  Si  Si6  1  0.102  0.215  0.974  1.0
  Si  Si7  1  0.898  0.785  0.026  1.0
  Si  Si8  1  0.785  0.898  0.526  1.0
  Si  Si9  1  0.215  0.102  0.474  1.0
  Cl  Cl10  1  0.475  0.525  0.750  1.0
  Cl  Cl11  1  0.525  0.475  0.250  1.0
  O  O12  1  0.381  0.907  0.353  1.0
  O  O13  1  0.957  0.200  0.467  1.0
  O  O14  1  0.797  0.685  0.581  1.0
  O  O15  1  0.685  0.797  0.081  1.0
  O  O16  1  0.800  0.043  0.033  1.0
  O  O17  1  0.907  0.381  0.853  1.0
  O  O18  1  0.619  0.093  0.647  1.0
  O  O19  1  0.728  0.964  0.348  1.0
  O  O20  1  0.272  0.036  0.652  1.0
  O  O21  1  0.964  0.728  0.848  1.0
  O  O22  1  0.315  0.203  0.919  1.0
  O  O23  1  0.043  0.800  0.533  1.0
  O  O24  1  0.203  0.315  0.419  1.0
  O  O25  1  0.200  0.957  0.967  1.0
  O  O26  1  0.093  0.619  0.147  1.0
  O  O27  1  0.036  0.272  0.152  1.0
[/CIF]
.