The material structure described by La5Si3O13 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), and four equivalent O(4) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), and one Si(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent La(2) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), 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. is represented by the CIF file [CIF]
data_La5Si3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.822
_cell_length_b   9.822
_cell_length_c   7.297
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   609.696
_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  0.333  0.667  0.995  1.0
  La  La1  1  0.667  0.333  0.005  1.0
  La  La2  1  0.243  0.231  0.250  1.0
  La  La3  1  0.757  0.769  0.750  1.0
  La  La4  1  0.769  0.012  0.250  1.0
  La  La5  1  0.231  0.988  0.750  1.0
  La  La6  1  0.988  0.757  0.250  1.0
  La  La7  1  0.012  0.243  0.750  1.0
  La  La8  1  0.333  0.667  0.505  1.0
  La  La9  1  0.667  0.333  0.495  1.0
  Si  Si10  1  0.030  0.400  0.250  1.0
  Si  Si11  1  0.970  0.600  0.750  1.0
  Si  Si12  1  0.600  0.630  0.250  1.0
  Si  Si13  1  0.400  0.370  0.750  1.0
  Si  Si14  1  0.370  0.970  0.250  1.0
  Si  Si15  1  0.630  0.030  0.750  1.0
  O  O16  1  0.484  0.162  0.250  1.0
  O  O17  1  0.516  0.838  0.750  1.0
  O  O18  1  0.838  0.322  0.250  1.0
  O  O19  1  0.162  0.678  0.750  1.0
  O  O20  1  0.678  0.516  0.250  1.0
  O  O21  1  0.322  0.484  0.750  1.0
  O  O22  1  0.000  0.000  0.250  1.0
  O  O23  1  0.000  0.000  0.750  1.0
  O  O24  1  0.124  0.594  0.250  1.0
  O  O25  1  0.876  0.406  0.750  1.0
  O  O26  1  0.406  0.530  0.250  1.0
  O  O27  1  0.594  0.470  0.750  1.0
  O  O28  1  0.470  0.876  0.250  1.0
  O  O29  1  0.530  0.124  0.750  1.0
  O  O30  1  0.091  0.343  0.431  1.0
  O  O31  1  0.909  0.657  0.569  1.0
  O  O32  1  0.657  0.748  0.431  1.0
  O  O33  1  0.343  0.252  0.569  1.0
  O  O34  1  0.252  0.909  0.431  1.0
  O  O35  1  0.748  0.091  0.569  1.0
  O  O36  1  0.091  0.343  0.069  1.0
  O  O37  1  0.909  0.657  0.931  1.0
  O  O38  1  0.657  0.748  0.069  1.0
  O  O39  1  0.343  0.252  0.931  1.0
  O  O40  1  0.252  0.909  0.069  1.0
  O  O41  1  0.748  0.091  0.931  1.0
[/CIF]
.
The material structure described by La5Si3O13 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), and four equivalent O(4) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), and one Si(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent La(2) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), 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. is represented by the CIF file [CIF]
data_La5Si3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.822
_cell_length_b   9.822
_cell_length_c   7.297
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   609.696
_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  0.333  0.667  0.995  1.0
  La  La1  1  0.667  0.333  0.005  1.0
  La  La2  1  0.243  0.231  0.250  1.0
  La  La3  1  0.757  0.769  0.750  1.0
  La  La4  1  0.769  0.012  0.250  1.0
  La  La5  1  0.231  0.988  0.750  1.0
  La  La6  1  0.988  0.757  0.250  1.0
  La  La7  1  0.012  0.243  0.750  1.0
  La  La8  1  0.333  0.667  0.505  1.0
  La  La9  1  0.667  0.333  0.495  1.0
  Si  Si10  1  0.030  0.400  0.250  1.0
  Si  Si11  1  0.970  0.600  0.750  1.0
  Si  Si12  1  0.600  0.630  0.250  1.0
  Si  Si13  1  0.400  0.370  0.750  1.0
  Si  Si14  1  0.370  0.970  0.250  1.0
  Si  Si15  1  0.630  0.030  0.750  1.0
  O  O16  1  0.484  0.162  0.250  1.0
  O  O17  1  0.516  0.838  0.750  1.0
  O  O18  1  0.838  0.322  0.250  1.0
  O  O19  1  0.162  0.678  0.750  1.0
  O  O20  1  0.678  0.516  0.250  1.0
  O  O21  1  0.322  0.484  0.750  1.0
  O  O22  1  0.000  0.000  0.250  1.0
  O  O23  1  0.000  0.000  0.750  1.0
  O  O24  1  0.124  0.594  0.250  1.0
  O  O25  1  0.876  0.406  0.750  1.0
  O  O26  1  0.406  0.530  0.250  1.0
  O  O27  1  0.594  0.470  0.750  1.0
  O  O28  1  0.470  0.876  0.250  1.0
  O  O29  1  0.530  0.124  0.750  1.0
  O  O30  1  0.091  0.343  0.431  1.0
  O  O31  1  0.909  0.657  0.569  1.0
  O  O32  1  0.657  0.748  0.431  1.0
  O  O33  1  0.343  0.252  0.569  1.0
  O  O34  1  0.252  0.909  0.431  1.0
  O  O35  1  0.748  0.091  0.569  1.0
  O  O36  1  0.091  0.343  0.069  1.0
  O  O37  1  0.909  0.657  0.931  1.0
  O  O38  1  0.657  0.748  0.069  1.0
  O  O39  1  0.343  0.252  0.931  1.0
  O  O40  1  0.252  0.909  0.069  1.0
  O  O41  1  0.748  0.091  0.931  1.0
[/CIF]
.