The compound described by K2Sb4O11 crystallizes in the monoclinic C2/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one O(5), one O(6), and four equivalent O(2) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(1), two equivalent O(4), and four equivalent O(3) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(6), one O(8), two equivalent O(1), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the second Sb site, Sb(2) is bonded to one O(6), one O(7), two equivalent O(3), 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 50-55°. In the third Sb site, Sb(3) is bonded to one O(1), one O(3), one O(5), one O(7), 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 32-47°. There are eight inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to two equivalent K(2), one Sb(2), and one Sb(3) atom. In the second O site, O(4) is bonded in a distorted water-like geometry to two equivalent K(2) and two equivalent Sb(1) atoms. In the third O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), and two equivalent Sb(3) atoms. In the fourth O site, O(6) is bonded in a distorted trigonal planar geometry to one K(1), one Sb(1), and one Sb(2) atom. In the fifth O site, O(7) is bonded in a distorted T-shaped geometry to one Sb(2) and two equivalent Sb(3) atoms. In the sixth O site, O(8) is bonded in a trigonal planar geometry to one Sb(1) and two equivalent Sb(2) atoms. In the seventh O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(2), one Sb(1), and one Sb(3) atom. In the eighth O site, O(2) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Sb(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Sb4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.453
_cell_length_b   10.453
_cell_length_c   7.185
_cell_angle_alpha   85.639
_cell_angle_beta   85.639
_cell_angle_gamma   42.465
_symmetry_Int_Tables_number   1
_cell_volume   528.289
_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
  K  K0  1  0.759  0.759  0.004  1.0
  K  K1  1  0.241  0.241  0.996  1.0
  K  K2  1  0.988  0.988  0.262  1.0
  K  K3  1  0.012  0.012  0.738  1.0
  Sb  Sb4  1  0.428  0.428  0.097  1.0
  Sb  Sb5  1  0.572  0.572  0.903  1.0
  Sb  Sb6  1  0.425  0.425  0.616  1.0
  Sb  Sb7  1  0.575  0.575  0.384  1.0
  Sb  Sb8  1  0.583  0.068  0.435  1.0
  Sb  Sb9  1  0.932  0.417  0.565  1.0
  Sb  Sb10  1  0.417  0.932  0.565  1.0
  Sb  Sb11  1  0.068  0.583  0.435  1.0
  O  O12  1  0.173  0.567  0.187  1.0
  O  O13  1  0.433  0.827  0.813  1.0
  O  O14  1  0.827  0.433  0.813  1.0
  O  O15  1  0.567  0.173  0.187  1.0
  O  O16  1  0.024  0.447  0.332  1.0
  O  O17  1  0.553  0.976  0.668  1.0
  O  O18  1  0.976  0.553  0.668  1.0
  O  O19  1  0.447  0.024  0.332  1.0
  O  O20  1  0.843  0.332  0.432  1.0
  O  O21  1  0.668  0.157  0.568  1.0
  O  O22  1  0.157  0.668  0.568  1.0
  O  O23  1  0.332  0.843  0.432  1.0
  O  O24  1  0.672  0.328  0.000  1.0
  O  O25  1  0.328  0.672  0.000  1.0
  O  O26  1  0.839  0.839  0.353  1.0
  O  O27  1  0.161  0.161  0.647  1.0
  O  O28  1  0.618  0.618  0.135  1.0
  O  O29  1  0.382  0.382  0.865  1.0
  O  O30  1  0.667  0.667  0.493  1.0
  O  O31  1  0.333  0.333  0.507  1.0
  O  O32  1  0.476  0.476  0.345  1.0
  O  O33  1  0.524  0.524  0.655  1.0
[/CIF]
.
The compound described by K2Sb4O11 crystallizes in the monoclinic C2/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one O(5), one O(6), and four equivalent O(2) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(1), two equivalent O(4), and four equivalent O(3) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(6), one O(8), two equivalent O(1), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the second Sb site, Sb(2) is bonded to one O(6), one O(7), two equivalent O(3), 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 50-55°. In the third Sb site, Sb(3) is bonded to one O(1), one O(3), one O(5), one O(7), 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 32-47°. There are eight inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to two equivalent K(2), one Sb(2), and one Sb(3) atom. In the second O site, O(4) is bonded in a distorted water-like geometry to two equivalent K(2) and two equivalent Sb(1) atoms. In the third O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), and two equivalent Sb(3) atoms. In the fourth O site, O(6) is bonded in a distorted trigonal planar geometry to one K(1), one Sb(1), and one Sb(2) atom. In the fifth O site, O(7) is bonded in a distorted T-shaped geometry to one Sb(2) and two equivalent Sb(3) atoms. In the sixth O site, O(8) is bonded in a trigonal planar geometry to one Sb(1) and two equivalent Sb(2) atoms. In the seventh O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(2), one Sb(1), and one Sb(3) atom. In the eighth O site, O(2) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Sb(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Sb4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.453
_cell_length_b   10.453
_cell_length_c   7.185
_cell_angle_alpha   85.639
_cell_angle_beta   85.639
_cell_angle_gamma   42.465
_symmetry_Int_Tables_number   1
_cell_volume   528.289
_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
  K  K0  1  0.759  0.759  0.004  1.0
  K  K1  1  0.241  0.241  0.996  1.0
  K  K2  1  0.988  0.988  0.262  1.0
  K  K3  1  0.012  0.012  0.738  1.0
  Sb  Sb4  1  0.428  0.428  0.097  1.0
  Sb  Sb5  1  0.572  0.572  0.903  1.0
  Sb  Sb6  1  0.425  0.425  0.616  1.0
  Sb  Sb7  1  0.575  0.575  0.384  1.0
  Sb  Sb8  1  0.583  0.068  0.435  1.0
  Sb  Sb9  1  0.932  0.417  0.565  1.0
  Sb  Sb10  1  0.417  0.932  0.565  1.0
  Sb  Sb11  1  0.068  0.583  0.435  1.0
  O  O12  1  0.173  0.567  0.187  1.0
  O  O13  1  0.433  0.827  0.813  1.0
  O  O14  1  0.827  0.433  0.813  1.0
  O  O15  1  0.567  0.173  0.187  1.0
  O  O16  1  0.024  0.447  0.332  1.0
  O  O17  1  0.553  0.976  0.668  1.0
  O  O18  1  0.976  0.553  0.668  1.0
  O  O19  1  0.447  0.024  0.332  1.0
  O  O20  1  0.843  0.332  0.432  1.0
  O  O21  1  0.668  0.157  0.568  1.0
  O  O22  1  0.157  0.668  0.568  1.0
  O  O23  1  0.332  0.843  0.432  1.0
  O  O24  1  0.672  0.328  0.000  1.0
  O  O25  1  0.328  0.672  0.000  1.0
  O  O26  1  0.839  0.839  0.353  1.0
  O  O27  1  0.161  0.161  0.647  1.0
  O  O28  1  0.618  0.618  0.135  1.0
  O  O29  1  0.382  0.382  0.865  1.0
  O  O30  1  0.667  0.667  0.493  1.0
  O  O31  1  0.333  0.333  0.507  1.0
  O  O32  1  0.476  0.476  0.345  1.0
  O  O33  1  0.524  0.524  0.655  1.0
[/CIF]
.