The compound described by NaYb3Ti2(SbO7)2 crystallizes in the monoclinic P2/c space group. Na(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form distorted NaO8 hexagonal bipyramids that share edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, edges with two equivalent Yb(3)O8 hexagonal bipyramids, edges with two equivalent Ti(1)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form distorted YbO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, edges with two equivalent Yb(3)O8 hexagonal bipyramids, edges with two equivalent Ti(1)O6 octahedra, edges with two equivalent Ti(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the second Yb site, Yb(2) is bonded to two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form distorted YbO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(3)O8 hexagonal bipyramids, edges with two equivalent Ti(2)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. In the third Yb site, Yb(3) is bonded to two equivalent O(1), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form distorted YbO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, edges with two equivalent Ti(1)O6 octahedra, edges with two equivalent Ti(2)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, and edges with two equivalent Yb(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 42-45°. In the second Ti site, Ti(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, and edges with two equivalent Yb(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 42-48°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, and edges with two equivalent Yb(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 45-49°. In the second Sb site, Sb(2) is bonded to two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms to form SbO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, and edges with two equivalent Yb(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 45-49°. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Yb(1), one Yb(2), and one Yb(3) atom to form ONaYb3 tetrahedra that share corners with two equivalent O(4)NaYbSb2 tetrahedra, corners with two equivalent O(7)Yb2TiSb tetrahedra, corners with four equivalent O(1)NaYb3 tetrahedra,  an edgeedge with one O(4)NaYbSb2 tetrahedra, and  an edgeedge with one O(7)Yb2TiSb tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Yb(1), one Ti(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), one Ti(2), and one Sb(1) atom. In the fourth O site, O(4) is bonded to one Na(1), one Yb(2), one Sb(1), and one Sb(2) atom to form distorted ONaYbSb2 tetrahedra that share corners with two equivalent O(1)NaYb3 tetrahedra, corners with two equivalent O(4)NaYbSb2 tetrahedra, corners with four equivalent O(7)Yb2TiSb tetrahedra,  an edgeedge with one O(1)NaYb3 tetrahedra, and  an edgeedge with one O(4)NaYbSb2 tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Ti(1), and one Ti(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), one Yb(3), one Ti(1), and one Sb(2) atom. In the seventh O site, O(7) is bonded to one Yb(2), one Yb(3), one Ti(2), and one Sb(2) atom to form distorted OYb2TiSb tetrahedra that share corners with two equivalent O(1)NaYb3 tetrahedra, corners with two equivalent O(7)Yb2TiSb tetrahedra, corners with four equivalent O(4)NaYbSb2 tetrahedra,  an edgeedge with one O(1)NaYb3 tetrahedra, and  an edgeedge with one O(7)Yb2TiSb tetrahedra. is represented by the CIF card [CIF]
data_NaYb3Ti2(SbO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.273
_cell_length_b   7.342
_cell_length_c   12.643
_cell_angle_alpha   54.885
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   552.218
_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
  Na  Na0  1  0.000  0.500  0.000  1.0
  Na  Na1  1  0.000  0.500  0.500  1.0
  Yb  Yb2  1  0.248  0.000  0.750  1.0
  Yb  Yb3  1  0.250  0.500  0.750  1.0
  Yb  Yb4  1  0.752  0.000  0.250  1.0
  Yb  Yb5  1  0.750  0.500  0.250  1.0
  Yb  Yb6  1  0.500  0.500  0.000  1.0
  Yb  Yb7  1  0.500  0.500  0.500  1.0
  Ti  Ti8  1  0.260  0.000  0.250  1.0
  Ti  Ti9  1  0.740  0.000  0.750  1.0
  Ti  Ti10  1  0.500  0.000  0.500  1.0
  Ti  Ti11  1  0.500  0.000  0.000  1.0
  Sb  Sb12  1  0.000  0.000  0.000  1.0
  Sb  Sb13  1  0.253  0.500  0.250  1.0
  Sb  Sb14  1  0.000  0.000  0.500  1.0
  Sb  Sb15  1  0.747  0.500  0.750  1.0
  O  O16  1  0.263  0.629  0.870  1.0
  O  O17  1  0.049  0.061  0.131  1.0
  O  O18  1  0.251  0.073  0.924  1.0
  O  O19  1  0.737  0.629  0.370  1.0
  O  O20  1  0.044  0.668  0.129  1.0
  O  O21  1  0.554  0.068  0.623  1.0
  O  O22  1  0.044  0.332  0.371  1.0
  O  O23  1  0.951  0.061  0.631  1.0
  O  O24  1  0.261  0.319  0.176  1.0
  O  O25  1  0.749  0.073  0.424  1.0
  O  O26  1  0.739  0.681  0.824  1.0
  O  O27  1  0.546  0.673  0.624  1.0
  O  O28  1  0.049  0.939  0.369  1.0
  O  O29  1  0.956  0.668  0.629  1.0
  O  O30  1  0.546  0.327  0.876  1.0
  O  O31  1  0.956  0.332  0.871  1.0
  O  O32  1  0.446  0.068  0.123  1.0
  O  O33  1  0.263  0.371  0.630  1.0
  O  O34  1  0.739  0.319  0.676  1.0
  O  O35  1  0.749  0.927  0.076  1.0
  O  O36  1  0.261  0.681  0.324  1.0
  O  O37  1  0.951  0.939  0.869  1.0
  O  O38  1  0.554  0.932  0.877  1.0
  O  O39  1  0.454  0.673  0.124  1.0
  O  O40  1  0.454  0.327  0.376  1.0
  O  O41  1  0.737  0.371  0.130  1.0
  O  O42  1  0.251  0.927  0.576  1.0
  O  O43  1  0.446  0.932  0.377  1.0
[/CIF]
.
The compound described by NaYb3Ti2(SbO7)2 crystallizes in the monoclinic P2/c space group. Na(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form distorted NaO8 hexagonal bipyramids that share edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, edges with two equivalent Yb(3)O8 hexagonal bipyramids, edges with two equivalent Ti(1)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form distorted YbO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, edges with two equivalent Yb(3)O8 hexagonal bipyramids, edges with two equivalent Ti(1)O6 octahedra, edges with two equivalent Ti(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the second Yb site, Yb(2) is bonded to two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form distorted YbO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(3)O8 hexagonal bipyramids, edges with two equivalent Ti(2)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. In the third Yb site, Yb(3) is bonded to two equivalent O(1), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form distorted YbO8 hexagonal bipyramids that share edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, edges with two equivalent Ti(1)O6 octahedra, edges with two equivalent Ti(2)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, and edges with two equivalent Yb(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 42-45°. In the second Ti site, Ti(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Yb(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, and edges with two equivalent Yb(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 42-48°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(1)O8 hexagonal bipyramids, and edges with two equivalent Yb(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 45-49°. In the second Sb site, Sb(2) is bonded to two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms to form SbO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, edges with two equivalent Yb(2)O8 hexagonal bipyramids, and edges with two equivalent Yb(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 45-49°. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Yb(1), one Yb(2), and one Yb(3) atom to form ONaYb3 tetrahedra that share corners with two equivalent O(4)NaYbSb2 tetrahedra, corners with two equivalent O(7)Yb2TiSb tetrahedra, corners with four equivalent O(1)NaYb3 tetrahedra,  an edgeedge with one O(4)NaYbSb2 tetrahedra, and  an edgeedge with one O(7)Yb2TiSb tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Yb(1), one Ti(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), one Ti(2), and one Sb(1) atom. In the fourth O site, O(4) is bonded to one Na(1), one Yb(2), one Sb(1), and one Sb(2) atom to form distorted ONaYbSb2 tetrahedra that share corners with two equivalent O(1)NaYb3 tetrahedra, corners with two equivalent O(4)NaYbSb2 tetrahedra, corners with four equivalent O(7)Yb2TiSb tetrahedra,  an edgeedge with one O(1)NaYb3 tetrahedra, and  an edgeedge with one O(4)NaYbSb2 tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Ti(1), and one Ti(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), one Yb(3), one Ti(1), and one Sb(2) atom. In the seventh O site, O(7) is bonded to one Yb(2), one Yb(3), one Ti(2), and one Sb(2) atom to form distorted OYb2TiSb tetrahedra that share corners with two equivalent O(1)NaYb3 tetrahedra, corners with two equivalent O(7)Yb2TiSb tetrahedra, corners with four equivalent O(4)NaYbSb2 tetrahedra,  an edgeedge with one O(1)NaYb3 tetrahedra, and  an edgeedge with one O(7)Yb2TiSb tetrahedra. is represented by the CIF card [CIF]
data_NaYb3Ti2(SbO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.273
_cell_length_b   7.342
_cell_length_c   12.643
_cell_angle_alpha   54.885
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   552.218
_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
  Na  Na0  1  0.000  0.500  0.000  1.0
  Na  Na1  1  0.000  0.500  0.500  1.0
  Yb  Yb2  1  0.248  0.000  0.750  1.0
  Yb  Yb3  1  0.250  0.500  0.750  1.0
  Yb  Yb4  1  0.752  0.000  0.250  1.0
  Yb  Yb5  1  0.750  0.500  0.250  1.0
  Yb  Yb6  1  0.500  0.500  0.000  1.0
  Yb  Yb7  1  0.500  0.500  0.500  1.0
  Ti  Ti8  1  0.260  0.000  0.250  1.0
  Ti  Ti9  1  0.740  0.000  0.750  1.0
  Ti  Ti10  1  0.500  0.000  0.500  1.0
  Ti  Ti11  1  0.500  0.000  0.000  1.0
  Sb  Sb12  1  0.000  0.000  0.000  1.0
  Sb  Sb13  1  0.253  0.500  0.250  1.0
  Sb  Sb14  1  0.000  0.000  0.500  1.0
  Sb  Sb15  1  0.747  0.500  0.750  1.0
  O  O16  1  0.263  0.629  0.870  1.0
  O  O17  1  0.049  0.061  0.131  1.0
  O  O18  1  0.251  0.073  0.924  1.0
  O  O19  1  0.737  0.629  0.370  1.0
  O  O20  1  0.044  0.668  0.129  1.0
  O  O21  1  0.554  0.068  0.623  1.0
  O  O22  1  0.044  0.332  0.371  1.0
  O  O23  1  0.951  0.061  0.631  1.0
  O  O24  1  0.261  0.319  0.176  1.0
  O  O25  1  0.749  0.073  0.424  1.0
  O  O26  1  0.739  0.681  0.824  1.0
  O  O27  1  0.546  0.673  0.624  1.0
  O  O28  1  0.049  0.939  0.369  1.0
  O  O29  1  0.956  0.668  0.629  1.0
  O  O30  1  0.546  0.327  0.876  1.0
  O  O31  1  0.956  0.332  0.871  1.0
  O  O32  1  0.446  0.068  0.123  1.0
  O  O33  1  0.263  0.371  0.630  1.0
  O  O34  1  0.739  0.319  0.676  1.0
  O  O35  1  0.749  0.927  0.076  1.0
  O  O36  1  0.261  0.681  0.324  1.0
  O  O37  1  0.951  0.939  0.869  1.0
  O  O38  1  0.554  0.932  0.877  1.0
  O  O39  1  0.454  0.673  0.124  1.0
  O  O40  1  0.454  0.327  0.376  1.0
  O  O41  1  0.737  0.371  0.130  1.0
  O  O42  1  0.251  0.927  0.576  1.0
  O  O43  1  0.446  0.932  0.377  1.0
[/CIF]
.