The crystal structure described by NaTmO2 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Tm(1)O6 octahedra, corners with two equivalent Tm(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Tm(1)O6 octahedra, and edges with four equivalent Tm(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the second Na site, Na(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Tm(1)O6 octahedra, corners with two equivalent Tm(2)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Tm(2)O6 octahedra, and edges with four equivalent Tm(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TmO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Tm(2)O6 octahedra, edges with two equivalent Tm(1)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Tm(2)O6 octahedra, and edges with four equivalent Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. In the second Tm site, Tm(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TmO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Tm(1)O6 octahedra, edges with two equivalent Tm(2)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Tm(1)O6 octahedra, and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(2), two equivalent Na(1), one Tm(1), and two equivalent Tm(2) atoms to form a mixture of corner and edge-sharing ONa3Tm3 octahedra. The corner-sharing octahedral tilt angles range from 2-12°. In the second O site, O(2) is bonded to one Na(1), two equivalent Na(2), one Tm(2), and two equivalent Tm(1) atoms to form a mixture of corner and edge-sharing ONa3Tm3 octahedra. The corner-sharing octahedral tilt angles range from 4-12°. is represented by the CIF file [CIF]
data_NaTmO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.801
_cell_length_b   7.248
_cell_length_c   5.925
_cell_angle_alpha   75.146
_cell_angle_beta   112.386
_cell_angle_gamma   75.848
_symmetry_Int_Tables_number   1
_cell_volume   205.708
_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  0.806  0.389  0.056  1.0
  Na  Na1  1  0.430  0.140  0.180  1.0
  Na  Na2  1  0.570  0.860  0.820  1.0
  Na  Na3  1  0.194  0.611  0.944  1.0
  Tm  Tm4  1  0.943  0.113  0.693  1.0
  Tm  Tm5  1  0.683  0.634  0.433  1.0
  Tm  Tm6  1  0.317  0.366  0.567  1.0
  Tm  Tm7  1  0.057  0.887  0.307  1.0
  O  O8  1  0.939  0.627  0.231  1.0
  O  O9  1  0.832  0.876  0.542  1.0
  O  O10  1  0.292  0.876  0.082  1.0
  O  O11  1  0.566  0.373  0.358  1.0
  O  O12  1  0.434  0.627  0.642  1.0
  O  O13  1  0.708  0.124  0.918  1.0
  O  O14  1  0.168  0.124  0.458  1.0
  O  O15  1  0.061  0.373  0.769  1.0
[/CIF]
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The crystal structure described by NaTmO2 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Tm(1)O6 octahedra, corners with two equivalent Tm(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Tm(1)O6 octahedra, and edges with four equivalent Tm(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the second Na site, Na(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Tm(1)O6 octahedra, corners with two equivalent Tm(2)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Tm(2)O6 octahedra, and edges with four equivalent Tm(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TmO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Tm(2)O6 octahedra, edges with two equivalent Tm(1)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Tm(2)O6 octahedra, and edges with four equivalent Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. In the second Tm site, Tm(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TmO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Tm(1)O6 octahedra, edges with two equivalent Tm(2)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Tm(1)O6 octahedra, and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(2), two equivalent Na(1), one Tm(1), and two equivalent Tm(2) atoms to form a mixture of corner and edge-sharing ONa3Tm3 octahedra. The corner-sharing octahedral tilt angles range from 2-12°. In the second O site, O(2) is bonded to one Na(1), two equivalent Na(2), one Tm(2), and two equivalent Tm(1) atoms to form a mixture of corner and edge-sharing ONa3Tm3 octahedra. The corner-sharing octahedral tilt angles range from 4-12°. is represented by the CIF file [CIF]
data_NaTmO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.801
_cell_length_b   7.248
_cell_length_c   5.925
_cell_angle_alpha   75.146
_cell_angle_beta   112.386
_cell_angle_gamma   75.848
_symmetry_Int_Tables_number   1
_cell_volume   205.708
_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  0.806  0.389  0.056  1.0
  Na  Na1  1  0.430  0.140  0.180  1.0
  Na  Na2  1  0.570  0.860  0.820  1.0
  Na  Na3  1  0.194  0.611  0.944  1.0
  Tm  Tm4  1  0.943  0.113  0.693  1.0
  Tm  Tm5  1  0.683  0.634  0.433  1.0
  Tm  Tm6  1  0.317  0.366  0.567  1.0
  Tm  Tm7  1  0.057  0.887  0.307  1.0
  O  O8  1  0.939  0.627  0.231  1.0
  O  O9  1  0.832  0.876  0.542  1.0
  O  O10  1  0.292  0.876  0.082  1.0
  O  O11  1  0.566  0.373  0.358  1.0
  O  O12  1  0.434  0.627  0.642  1.0
  O  O13  1  0.708  0.124  0.918  1.0
  O  O14  1  0.168  0.124  0.458  1.0
  O  O15  1  0.061  0.373  0.769  1.0
[/CIF]
.