The material described by Tb3NSe2O crystallizes in the monoclinic C2/m space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to two equivalent N(1), three equivalent Se(1), and two equivalent O(1) atoms. In the second Tb site, Tb(2) is bonded in a 6-coordinate geometry to one N(1), one Se(1), two equivalent Se(2), and two equivalent O(1) atoms. In the third Tb site, Tb(3) is bonded to one N(1), two equivalent Se(1), and three equivalent Se(2) atoms to form distorted edge-sharing TbSe5N octahedra. N(1) is bonded to one Tb(2), one Tb(3), and two equivalent Tb(1) atoms to form NTb4 tetrahedra that share corners with three equivalent Se(1)Tb6 octahedra, corners with five equivalent Se(2)Tb5 square pyramids, corners with two equivalent N(1)Tb4 tetrahedra, corners with two equivalent O(1)Tb4 tetrahedra, edges with three equivalent Se(1)Tb6 octahedra, and edges with two equivalent O(1)Tb4 tetrahedra. The corner-sharing octahedral tilt angles range from 28-40°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one Tb(2), two equivalent Tb(3), and three equivalent Tb(1) atoms to form distorted SeTb6 octahedra that share corners with two equivalent Se(2)Tb5 square pyramids, corners with three equivalent N(1)Tb4 tetrahedra, corners with four equivalent O(1)Tb4 tetrahedra, edges with four equivalent Se(1)Tb6 octahedra, edges with three equivalent Se(2)Tb5 square pyramids, edges with two equivalent O(1)Tb4 tetrahedra, and edges with three equivalent N(1)Tb4 tetrahedra. In the second Se site, Se(2) is bonded to two equivalent Tb(2) and three equivalent Tb(3) atoms to form SeTb5 square pyramids that share corners with two equivalent Se(1)Tb6 octahedra, corners with two equivalent O(1)Tb4 tetrahedra, corners with five equivalent N(1)Tb4 tetrahedra, edges with three equivalent Se(1)Tb6 octahedra, edges with four equivalent Se(2)Tb5 square pyramids, and  an edgeedge with one O(1)Tb4 tetrahedra. The corner-sharing octahedral tilt angles are 9°. O(1) is bonded to two equivalent Tb(1) and two equivalent Tb(2) atoms to form OTb4 tetrahedra that share corners with four equivalent Se(1)Tb6 octahedra, corners with two equivalent Se(2)Tb5 square pyramids, corners with two equivalent N(1)Tb4 tetrahedra, corners with two equivalent O(1)Tb4 tetrahedra, edges with two equivalent Se(1)Tb6 octahedra,  an edgeedge with one Se(2)Tb5 square pyramid,  an edgeedge with one O(1)Tb4 tetrahedra, and edges with two equivalent N(1)Tb4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-50°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb3Se2NO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.047
_cell_length_b   8.047
_cell_length_c   9.765
_cell_angle_alpha   82.850
_cell_angle_beta   82.850
_cell_angle_gamma   28.334
_symmetry_Int_Tables_number   1
_cell_volume   297.642
_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
  Tb  Tb0  1  0.391  0.391  0.946  1.0
  Tb  Tb1  1  0.609  0.609  0.054  1.0
  Tb  Tb2  1  0.044  0.044  0.739  1.0
  Tb  Tb3  1  0.956  0.956  0.261  1.0
  Tb  Tb4  1  0.198  0.198  0.325  1.0
  Tb  Tb5  1  0.802  0.802  0.675  1.0
  Se  Se6  1  0.212  0.212  0.850  1.0
  Se  Se7  1  0.788  0.788  0.150  1.0
  Se  Se8  1  0.371  0.371  0.474  1.0
  Se  Se9  1  0.629  0.629  0.526  1.0
  N  N10  1  0.098  0.098  0.187  1.0
  N  N11  1  0.902  0.902  0.813  1.0
  O  O12  1  0.536  0.536  0.860  1.0
  O  O13  1  0.464  0.464  0.140  1.0
[/CIF]
.
The material described by Tb3NSe2O crystallizes in the monoclinic C2/m space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to two equivalent N(1), three equivalent Se(1), and two equivalent O(1) atoms. In the second Tb site, Tb(2) is bonded in a 6-coordinate geometry to one N(1), one Se(1), two equivalent Se(2), and two equivalent O(1) atoms. In the third Tb site, Tb(3) is bonded to one N(1), two equivalent Se(1), and three equivalent Se(2) atoms to form distorted edge-sharing TbSe5N octahedra. N(1) is bonded to one Tb(2), one Tb(3), and two equivalent Tb(1) atoms to form NTb4 tetrahedra that share corners with three equivalent Se(1)Tb6 octahedra, corners with five equivalent Se(2)Tb5 square pyramids, corners with two equivalent N(1)Tb4 tetrahedra, corners with two equivalent O(1)Tb4 tetrahedra, edges with three equivalent Se(1)Tb6 octahedra, and edges with two equivalent O(1)Tb4 tetrahedra. The corner-sharing octahedral tilt angles range from 28-40°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one Tb(2), two equivalent Tb(3), and three equivalent Tb(1) atoms to form distorted SeTb6 octahedra that share corners with two equivalent Se(2)Tb5 square pyramids, corners with three equivalent N(1)Tb4 tetrahedra, corners with four equivalent O(1)Tb4 tetrahedra, edges with four equivalent Se(1)Tb6 octahedra, edges with three equivalent Se(2)Tb5 square pyramids, edges with two equivalent O(1)Tb4 tetrahedra, and edges with three equivalent N(1)Tb4 tetrahedra. In the second Se site, Se(2) is bonded to two equivalent Tb(2) and three equivalent Tb(3) atoms to form SeTb5 square pyramids that share corners with two equivalent Se(1)Tb6 octahedra, corners with two equivalent O(1)Tb4 tetrahedra, corners with five equivalent N(1)Tb4 tetrahedra, edges with three equivalent Se(1)Tb6 octahedra, edges with four equivalent Se(2)Tb5 square pyramids, and  an edgeedge with one O(1)Tb4 tetrahedra. The corner-sharing octahedral tilt angles are 9°. O(1) is bonded to two equivalent Tb(1) and two equivalent Tb(2) atoms to form OTb4 tetrahedra that share corners with four equivalent Se(1)Tb6 octahedra, corners with two equivalent Se(2)Tb5 square pyramids, corners with two equivalent N(1)Tb4 tetrahedra, corners with two equivalent O(1)Tb4 tetrahedra, edges with two equivalent Se(1)Tb6 octahedra,  an edgeedge with one Se(2)Tb5 square pyramid,  an edgeedge with one O(1)Tb4 tetrahedra, and edges with two equivalent N(1)Tb4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-50°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb3Se2NO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.047
_cell_length_b   8.047
_cell_length_c   9.765
_cell_angle_alpha   82.850
_cell_angle_beta   82.850
_cell_angle_gamma   28.334
_symmetry_Int_Tables_number   1
_cell_volume   297.642
_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
  Tb  Tb0  1  0.391  0.391  0.946  1.0
  Tb  Tb1  1  0.609  0.609  0.054  1.0
  Tb  Tb2  1  0.044  0.044  0.739  1.0
  Tb  Tb3  1  0.956  0.956  0.261  1.0
  Tb  Tb4  1  0.198  0.198  0.325  1.0
  Tb  Tb5  1  0.802  0.802  0.675  1.0
  Se  Se6  1  0.212  0.212  0.850  1.0
  Se  Se7  1  0.788  0.788  0.150  1.0
  Se  Se8  1  0.371  0.371  0.474  1.0
  Se  Se9  1  0.629  0.629  0.526  1.0
  N  N10  1  0.098  0.098  0.187  1.0
  N  N11  1  0.902  0.902  0.813  1.0
  O  O12  1  0.536  0.536  0.860  1.0
  O  O13  1  0.464  0.464  0.140  1.0
[/CIF]
.