The material structure described by Na5Gd4Si4O16F crystallizes in the tetragonal I-4 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), and four equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a distorted q6 geometry to four equivalent O(2), four equivalent O(3), and two equivalent F(1) atoms. Gd(1) is bonded in a 8-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and one F(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(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), two equivalent Gd(1), and one Si(1) atom. In the second O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Gd(1), and one Si(1) atom. In the third O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Na(1), one Gd(1), and one Si(1) atom. In the fourth O site, O(2) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), two equivalent Gd(1), and one Si(1) atom. F(1) is bonded to two equivalent Na(2) and four equivalent Gd(1) atoms to form corner-sharing FNa2Gd4 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Na5Gd4Si4O16F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.787
_cell_length_b   8.787
_cell_length_c   8.787
_cell_angle_alpha   95.568
_cell_angle_beta   95.568
_cell_angle_gamma   143.701
_symmetry_Int_Tables_number   1
_cell_volume   381.709
_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
  Na  Na0  1  0.097  0.403  0.485  1.0
  Na  Na1  1  0.918  0.613  0.515  1.0
  Na  Na2  1  0.387  0.903  0.306  1.0
  Na  Na3  1  0.597  0.082  0.694  1.0
  Na  Na4  1  0.500  0.500  0.000  1.0
  Gd  Gd5  1  0.138  0.838  0.933  1.0
  Gd  Gd6  1  0.906  0.205  0.067  1.0
  Gd  Gd7  1  0.795  0.862  0.701  1.0
  Gd  Gd8  1  0.162  0.094  0.299  1.0
  Si  Si9  1  0.243  0.593  0.856  1.0
  Si  Si10  1  0.737  0.387  0.144  1.0
  Si  Si11  1  0.613  0.757  0.350  1.0
  Si  Si12  1  0.407  0.263  0.650  1.0
  O  O13  1  0.128  0.622  0.722  1.0
  O  O14  1  0.900  0.406  0.278  1.0
  O  O15  1  0.594  0.872  0.494  1.0
  O  O16  1  0.378  0.100  0.506  1.0
  O  O17  1  0.546  0.782  0.860  1.0
  O  O18  1  0.922  0.686  0.140  1.0
  O  O19  1  0.314  0.454  0.236  1.0
  O  O20  1  0.218  0.078  0.764  1.0
  O  O21  1  0.038  0.279  0.828  1.0
  O  O22  1  0.451  0.210  0.172  1.0
  O  O23  1  0.790  0.962  0.241  1.0
  O  O24  1  0.721  0.549  0.759  1.0
  O  O25  1  0.238  0.675  0.032  1.0
  O  O26  1  0.643  0.206  0.968  1.0
  O  O27  1  0.794  0.762  0.437  1.0
  O  O28  1  0.325  0.357  0.563  1.0
  F  F29  1  0.000  0.000  0.000  1.0
[/CIF]
.
The material structure described by Na5Gd4Si4O16F crystallizes in the tetragonal I-4 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), and four equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a distorted q6 geometry to four equivalent O(2), four equivalent O(3), and two equivalent F(1) atoms. Gd(1) is bonded in a 8-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and one F(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(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), two equivalent Gd(1), and one Si(1) atom. In the second O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Gd(1), and one Si(1) atom. In the third O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Na(1), one Gd(1), and one Si(1) atom. In the fourth O site, O(2) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), two equivalent Gd(1), and one Si(1) atom. F(1) is bonded to two equivalent Na(2) and four equivalent Gd(1) atoms to form corner-sharing FNa2Gd4 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Na5Gd4Si4O16F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.787
_cell_length_b   8.787
_cell_length_c   8.787
_cell_angle_alpha   95.568
_cell_angle_beta   95.568
_cell_angle_gamma   143.701
_symmetry_Int_Tables_number   1
_cell_volume   381.709
_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
  Na  Na0  1  0.097  0.403  0.485  1.0
  Na  Na1  1  0.918  0.613  0.515  1.0
  Na  Na2  1  0.387  0.903  0.306  1.0
  Na  Na3  1  0.597  0.082  0.694  1.0
  Na  Na4  1  0.500  0.500  0.000  1.0
  Gd  Gd5  1  0.138  0.838  0.933  1.0
  Gd  Gd6  1  0.906  0.205  0.067  1.0
  Gd  Gd7  1  0.795  0.862  0.701  1.0
  Gd  Gd8  1  0.162  0.094  0.299  1.0
  Si  Si9  1  0.243  0.593  0.856  1.0
  Si  Si10  1  0.737  0.387  0.144  1.0
  Si  Si11  1  0.613  0.757  0.350  1.0
  Si  Si12  1  0.407  0.263  0.650  1.0
  O  O13  1  0.128  0.622  0.722  1.0
  O  O14  1  0.900  0.406  0.278  1.0
  O  O15  1  0.594  0.872  0.494  1.0
  O  O16  1  0.378  0.100  0.506  1.0
  O  O17  1  0.546  0.782  0.860  1.0
  O  O18  1  0.922  0.686  0.140  1.0
  O  O19  1  0.314  0.454  0.236  1.0
  O  O20  1  0.218  0.078  0.764  1.0
  O  O21  1  0.038  0.279  0.828  1.0
  O  O22  1  0.451  0.210  0.172  1.0
  O  O23  1  0.790  0.962  0.241  1.0
  O  O24  1  0.721  0.549  0.759  1.0
  O  O25  1  0.238  0.675  0.032  1.0
  O  O26  1  0.643  0.206  0.968  1.0
  O  O27  1  0.794  0.762  0.437  1.0
  O  O28  1  0.325  0.357  0.563  1.0
  F  F29  1  0.000  0.000  0.000  1.0
[/CIF]
.