The structure described by NaSmSiO4 crystallizes in the tetragonal I4/m space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(3), and four equivalent O(2) atoms. Sm(1) is bonded in a 8-coordinate geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Sm(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), three equivalent Sm(1), and one Si(1) atom. In the third O site, O(2) is bonded to four equivalent Na(1), one Sm(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing ONa4SmSi octahedra. The corner-sharing octahedral tilt angles are 11°. is represented by the CIF file [CIF]
data_NaSmSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.851
_cell_length_b   8.851
_cell_length_c   8.851
_cell_angle_alpha   95.326
_cell_angle_beta   95.326
_cell_angle_gamma   144.523
_symmetry_Int_Tables_number   1
_cell_volume   383.309
_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
  Na  Na0  1  0.393  0.087  0.480  1.0
  Na  Na1  1  0.913  0.393  0.306  1.0
  Na  Na2  1  0.087  0.607  0.694  1.0
  Na  Na3  1  0.607  0.913  0.520  1.0
  Sm  Sm4  1  0.878  0.809  0.687  1.0
  Sm  Sm5  1  0.191  0.878  0.070  1.0
  Sm  Sm6  1  0.122  0.191  0.313  1.0
  Sm  Sm7  1  0.809  0.122  0.930  1.0
  Si  Si8  1  0.402  0.738  0.141  1.0
  Si  Si9  1  0.598  0.262  0.859  1.0
  Si  Si10  1  0.738  0.598  0.336  1.0
  Si  Si11  1  0.262  0.402  0.664  1.0
  O  O12  1  0.695  0.730  0.425  1.0
  O  O13  1  0.730  0.305  0.035  1.0
  O  O14  1  0.270  0.695  0.965  1.0
  O  O15  1  0.305  0.270  0.575  1.0
  O  O16  1  0.122  0.397  0.518  1.0
  O  O17  1  0.397  0.878  0.275  1.0
  O  O18  1  0.603  0.122  0.725  1.0
  O  O19  1  0.878  0.603  0.481  1.0
  O  O20  1  0.050  0.203  0.766  1.0
  O  O21  1  0.203  0.437  0.154  1.0
  O  O22  1  0.284  0.050  0.846  1.0
  O  O23  1  0.437  0.284  0.234  1.0
  O  O24  1  0.563  0.716  0.766  1.0
  O  O25  1  0.716  0.950  0.154  1.0
  O  O26  1  0.797  0.563  0.846  1.0
  O  O27  1  0.950  0.797  0.234  1.0
[/CIF]
.
The structure described by NaSmSiO4 crystallizes in the tetragonal I4/m space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(3), and four equivalent O(2) atoms. Sm(1) is bonded in a 8-coordinate geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Sm(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), three equivalent Sm(1), and one Si(1) atom. In the third O site, O(2) is bonded to four equivalent Na(1), one Sm(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing ONa4SmSi octahedra. The corner-sharing octahedral tilt angles are 11°. is represented by the CIF file [CIF]
data_NaSmSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.851
_cell_length_b   8.851
_cell_length_c   8.851
_cell_angle_alpha   95.326
_cell_angle_beta   95.326
_cell_angle_gamma   144.523
_symmetry_Int_Tables_number   1
_cell_volume   383.309
_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
  Na  Na0  1  0.393  0.087  0.480  1.0
  Na  Na1  1  0.913  0.393  0.306  1.0
  Na  Na2  1  0.087  0.607  0.694  1.0
  Na  Na3  1  0.607  0.913  0.520  1.0
  Sm  Sm4  1  0.878  0.809  0.687  1.0
  Sm  Sm5  1  0.191  0.878  0.070  1.0
  Sm  Sm6  1  0.122  0.191  0.313  1.0
  Sm  Sm7  1  0.809  0.122  0.930  1.0
  Si  Si8  1  0.402  0.738  0.141  1.0
  Si  Si9  1  0.598  0.262  0.859  1.0
  Si  Si10  1  0.738  0.598  0.336  1.0
  Si  Si11  1  0.262  0.402  0.664  1.0
  O  O12  1  0.695  0.730  0.425  1.0
  O  O13  1  0.730  0.305  0.035  1.0
  O  O14  1  0.270  0.695  0.965  1.0
  O  O15  1  0.305  0.270  0.575  1.0
  O  O16  1  0.122  0.397  0.518  1.0
  O  O17  1  0.397  0.878  0.275  1.0
  O  O18  1  0.603  0.122  0.725  1.0
  O  O19  1  0.878  0.603  0.481  1.0
  O  O20  1  0.050  0.203  0.766  1.0
  O  O21  1  0.203  0.437  0.154  1.0
  O  O22  1  0.284  0.050  0.846  1.0
  O  O23  1  0.437  0.284  0.234  1.0
  O  O24  1  0.563  0.716  0.766  1.0
  O  O25  1  0.716  0.950  0.154  1.0
  O  O26  1  0.797  0.563  0.846  1.0
  O  O27  1  0.950  0.797  0.234  1.0
[/CIF]
.