The structure described by Na2Sb4O11 crystallizes in the monoclinic C2/m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one O(6) and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(4), and two equivalent O(7) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 50-55°. In the second Sb site, Sb(2) is bonded to one O(1), one O(3), two equivalent O(4), and two equivalent O(8) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 48-55°. In the third Sb site, Sb(3) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 34-48°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Na(2) and two equivalent Sb(3) atoms. In the second O site, O(8) is bonded in a water-like geometry to two equivalent Sb(2) atoms. In the third O site, O(1) is bonded in a trigonal planar geometry to one Sb(2) and two equivalent Sb(1) atoms. In the fourth O site, O(2) is bonded in a distorted water-like geometry to one Na(1), one Sb(1), and one Sb(3) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Na(2), one Sb(1), and one Sb(2) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to one Na(2), one Sb(2), and one Sb(3) atom. In the seventh O site, O(5) is bonded in a distorted T-shaped geometry to one Sb(1) and two equivalent Sb(3) atoms. In the eighth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Na(1) and two equivalent Sb(3) atoms. is represented by the CIF card [CIF]
data_Na2Sb4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.621
_cell_length_b   10.621
_cell_length_c   7.280
_cell_angle_alpha   84.834
_cell_angle_beta   84.834
_cell_angle_gamma   42.172
_symmetry_Int_Tables_number   1
_cell_volume   548.740
_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  0.969  0.969  0.281  1.0
  Na  Na1  1  0.265  0.265  0.076  1.0
  Na  Na2  1  0.735  0.735  0.924  1.0
  Na  Na3  1  0.031  0.031  0.719  1.0
  Sb  Sb4  1  0.424  0.424  0.617  1.0
  Sb  Sb5  1  0.429  0.429  0.097  1.0
  Sb  Sb6  1  0.584  0.068  0.436  1.0
  Sb  Sb7  1  0.068  0.584  0.436  1.0
  Sb  Sb8  1  0.416  0.932  0.564  1.0
  Sb  Sb9  1  0.932  0.416  0.564  1.0
  Sb  Sb10  1  0.571  0.571  0.903  1.0
  Sb  Sb11  1  0.576  0.576  0.383  1.0
  O  O12  1  0.477  0.477  0.344  1.0
  O  O13  1  0.669  0.156  0.565  1.0
  O  O14  1  0.156  0.669  0.565  1.0
  O  O15  1  0.381  0.381  0.869  1.0
  O  O16  1  0.561  0.175  0.186  1.0
  O  O17  1  0.175  0.561  0.186  1.0
  O  O18  1  0.333  0.333  0.515  1.0
  O  O19  1  0.846  0.846  0.353  1.0
  O  O20  1  0.969  0.557  0.667  1.0
  O  O21  1  0.557  0.969  0.667  1.0
  O  O22  1  0.031  0.443  0.333  1.0
  O  O23  1  0.443  0.031  0.333  1.0
  O  O24  1  0.154  0.154  0.647  1.0
  O  O25  1  0.667  0.667  0.485  1.0
  O  O26  1  0.439  0.825  0.814  1.0
  O  O27  1  0.825  0.439  0.814  1.0
  O  O28  1  0.619  0.619  0.131  1.0
  O  O29  1  0.844  0.331  0.435  1.0
  O  O30  1  0.331  0.844  0.435  1.0
  O  O31  1  0.523  0.523  0.656  1.0
  O  O32  1  0.674  0.326  0.000  1.0
  O  O33  1  0.326  0.674  0.000  1.0
[/CIF]
.
The structure described by Na2Sb4O11 crystallizes in the monoclinic C2/m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one O(6) and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(4), and two equivalent O(7) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 50-55°. In the second Sb site, Sb(2) is bonded to one O(1), one O(3), two equivalent O(4), and two equivalent O(8) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 48-55°. In the third Sb site, Sb(3) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 34-48°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Na(2) and two equivalent Sb(3) atoms. In the second O site, O(8) is bonded in a water-like geometry to two equivalent Sb(2) atoms. In the third O site, O(1) is bonded in a trigonal planar geometry to one Sb(2) and two equivalent Sb(1) atoms. In the fourth O site, O(2) is bonded in a distorted water-like geometry to one Na(1), one Sb(1), and one Sb(3) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Na(2), one Sb(1), and one Sb(2) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to one Na(2), one Sb(2), and one Sb(3) atom. In the seventh O site, O(5) is bonded in a distorted T-shaped geometry to one Sb(1) and two equivalent Sb(3) atoms. In the eighth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Na(1) and two equivalent Sb(3) atoms. is represented by the CIF card [CIF]
data_Na2Sb4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.621
_cell_length_b   10.621
_cell_length_c   7.280
_cell_angle_alpha   84.834
_cell_angle_beta   84.834
_cell_angle_gamma   42.172
_symmetry_Int_Tables_number   1
_cell_volume   548.740
_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  0.969  0.969  0.281  1.0
  Na  Na1  1  0.265  0.265  0.076  1.0
  Na  Na2  1  0.735  0.735  0.924  1.0
  Na  Na3  1  0.031  0.031  0.719  1.0
  Sb  Sb4  1  0.424  0.424  0.617  1.0
  Sb  Sb5  1  0.429  0.429  0.097  1.0
  Sb  Sb6  1  0.584  0.068  0.436  1.0
  Sb  Sb7  1  0.068  0.584  0.436  1.0
  Sb  Sb8  1  0.416  0.932  0.564  1.0
  Sb  Sb9  1  0.932  0.416  0.564  1.0
  Sb  Sb10  1  0.571  0.571  0.903  1.0
  Sb  Sb11  1  0.576  0.576  0.383  1.0
  O  O12  1  0.477  0.477  0.344  1.0
  O  O13  1  0.669  0.156  0.565  1.0
  O  O14  1  0.156  0.669  0.565  1.0
  O  O15  1  0.381  0.381  0.869  1.0
  O  O16  1  0.561  0.175  0.186  1.0
  O  O17  1  0.175  0.561  0.186  1.0
  O  O18  1  0.333  0.333  0.515  1.0
  O  O19  1  0.846  0.846  0.353  1.0
  O  O20  1  0.969  0.557  0.667  1.0
  O  O21  1  0.557  0.969  0.667  1.0
  O  O22  1  0.031  0.443  0.333  1.0
  O  O23  1  0.443  0.031  0.333  1.0
  O  O24  1  0.154  0.154  0.647  1.0
  O  O25  1  0.667  0.667  0.485  1.0
  O  O26  1  0.439  0.825  0.814  1.0
  O  O27  1  0.825  0.439  0.814  1.0
  O  O28  1  0.619  0.619  0.131  1.0
  O  O29  1  0.844  0.331  0.435  1.0
  O  O30  1  0.331  0.844  0.435  1.0
  O  O31  1  0.523  0.523  0.656  1.0
  O  O32  1  0.674  0.326  0.000  1.0
  O  O33  1  0.326  0.674  0.000  1.0
[/CIF]
.