The crystal structure described by La10Si8O3 crystallizes in the hexagonal P6/mmm space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(2), four equivalent Si(1), and two equivalent O(1) atoms. In the second La site, La(2) is bonded in a distorted linear geometry to two equivalent Si(1), two equivalent Si(2), and two equivalent O(1) atoms. In the third La site, La(3) is bonded to twelve equivalent Si(1) atoms to form face-sharing LaSi12 cuboctahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one La(2), two equivalent La(3), four equivalent La(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent La(2) and six equivalent La(1) atoms. O(1) is bonded to two equivalent La(2) and four equivalent La(1) atoms to form corner-sharing OLa6 octahedra. The corner-sharing octahedral tilt angles range from 0-31°. is represented by the CIF card [CIF]
data_La10Si8O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.978
_cell_length_b   10.978
_cell_length_c   4.674
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   487.845
_cell_formula_units_Z   1
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  0.210  0.790  0.000  1.0
  La  La1  1  0.000  0.500  0.500  1.0
  La  La2  1  0.580  0.790  0.000  1.0
  La  La3  1  0.790  0.580  0.000  1.0
  La  La4  1  0.000  0.000  0.000  1.0
  La  La5  1  0.210  0.420  0.000  1.0
  La  La6  1  0.420  0.210  0.000  1.0
  La  La7  1  0.500  0.500  0.500  1.0
  La  La8  1  0.790  0.210  0.000  1.0
  La  La9  1  0.500  0.000  0.500  1.0
  Si  Si10  1  0.000  0.782  0.500  1.0
  Si  Si11  1  0.000  0.218  0.500  1.0
  Si  Si12  1  0.218  0.218  0.500  1.0
  Si  Si13  1  0.782  0.000  0.500  1.0
  Si  Si14  1  0.333  0.667  0.500  1.0
  Si  Si15  1  0.218  0.000  0.500  1.0
  Si  Si16  1  0.667  0.333  0.500  1.0
  Si  Si17  1  0.782  0.782  0.500  1.0
  O  O18  1  0.000  0.500  0.000  1.0
  O  O19  1  0.500  0.500  0.000  1.0
  O  O20  1  0.500  0.000  0.000  1.0
[/CIF]
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The crystal structure described by La10Si8O3 crystallizes in the hexagonal P6/mmm space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(2), four equivalent Si(1), and two equivalent O(1) atoms. In the second La site, La(2) is bonded in a distorted linear geometry to two equivalent Si(1), two equivalent Si(2), and two equivalent O(1) atoms. In the third La site, La(3) is bonded to twelve equivalent Si(1) atoms to form face-sharing LaSi12 cuboctahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one La(2), two equivalent La(3), four equivalent La(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent La(2) and six equivalent La(1) atoms. O(1) is bonded to two equivalent La(2) and four equivalent La(1) atoms to form corner-sharing OLa6 octahedra. The corner-sharing octahedral tilt angles range from 0-31°. is represented by the CIF card [CIF]
data_La10Si8O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.978
_cell_length_b   10.978
_cell_length_c   4.674
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   487.845
_cell_formula_units_Z   1
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  0.210  0.790  0.000  1.0
  La  La1  1  0.000  0.500  0.500  1.0
  La  La2  1  0.580  0.790  0.000  1.0
  La  La3  1  0.790  0.580  0.000  1.0
  La  La4  1  0.000  0.000  0.000  1.0
  La  La5  1  0.210  0.420  0.000  1.0
  La  La6  1  0.420  0.210  0.000  1.0
  La  La7  1  0.500  0.500  0.500  1.0
  La  La8  1  0.790  0.210  0.000  1.0
  La  La9  1  0.500  0.000  0.500  1.0
  Si  Si10  1  0.000  0.782  0.500  1.0
  Si  Si11  1  0.000  0.218  0.500  1.0
  Si  Si12  1  0.218  0.218  0.500  1.0
  Si  Si13  1  0.782  0.000  0.500  1.0
  Si  Si14  1  0.333  0.667  0.500  1.0
  Si  Si15  1  0.218  0.000  0.500  1.0
  Si  Si16  1  0.667  0.333  0.500  1.0
  Si  Si17  1  0.782  0.782  0.500  1.0
  O  O18  1  0.000  0.500  0.000  1.0
  O  O19  1  0.500  0.500  0.000  1.0
  O  O20  1  0.500  0.000  0.000  1.0
[/CIF]
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