The crystal structure described by K4Sb2O5 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(3) and four equivalent O(2) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form corner-sharing SbO4 tetrahedra. In the second Sb site, Sb(2) is bonded in a water-like geometry to two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one K(4), two equivalent K(2), two equivalent K(3), and one Sb(1) atom to form a mixture of distorted corner, face, and edge-sharing OK5Sb octahedra. The corner-sharing octahedral tilt angles range from 42-65°. In the second O site, O(2) is bonded to one K(3), two equivalent K(1), two equivalent K(4), and one Sb(2) atom to form a mixture of distorted corner, face, and edge-sharing OK5Sb octahedra. The corner-sharing octahedral tilt angles range from 42-65°. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1) and two equivalent Sb(1) atoms. is represented by the CIF card [CIF]
data_K4Sb2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.491
_cell_length_b   9.491
_cell_length_c   6.476
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   156.097
_symmetry_Int_Tables_number   1
_cell_volume   236.369
_cell_formula_units_Z   1
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  0.902  0.098  0.500  1.0
  K  K1  1  0.097  0.903  0.000  1.0
  K  K2  1  0.237  0.763  0.500  1.0
  K  K3  1  0.764  0.236  0.000  1.0
  Sb  Sb4  1  0.587  0.413  0.500  1.0
  Sb  Sb5  1  0.417  0.583  0.000  1.0
  O  O6  1  0.653  0.347  0.269  1.0
  O  O7  1  0.348  0.652  0.228  1.0
  O  O8  1  0.653  0.347  0.731  1.0
  O  O9  1  0.348  0.652  0.772  1.0
  O  O10  1  0.049  0.951  0.500  1.0
[/CIF]
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The crystal structure described by K4Sb2O5 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(3) and four equivalent O(2) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form corner-sharing SbO4 tetrahedra. In the second Sb site, Sb(2) is bonded in a water-like geometry to two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one K(4), two equivalent K(2), two equivalent K(3), and one Sb(1) atom to form a mixture of distorted corner, face, and edge-sharing OK5Sb octahedra. The corner-sharing octahedral tilt angles range from 42-65°. In the second O site, O(2) is bonded to one K(3), two equivalent K(1), two equivalent K(4), and one Sb(2) atom to form a mixture of distorted corner, face, and edge-sharing OK5Sb octahedra. The corner-sharing octahedral tilt angles range from 42-65°. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1) and two equivalent Sb(1) atoms. is represented by the CIF card [CIF]
data_K4Sb2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.491
_cell_length_b   9.491
_cell_length_c   6.476
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   156.097
_symmetry_Int_Tables_number   1
_cell_volume   236.369
_cell_formula_units_Z   1
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  0.902  0.098  0.500  1.0
  K  K1  1  0.097  0.903  0.000  1.0
  K  K2  1  0.237  0.763  0.500  1.0
  K  K3  1  0.764  0.236  0.000  1.0
  Sb  Sb4  1  0.587  0.413  0.500  1.0
  Sb  Sb5  1  0.417  0.583  0.000  1.0
  O  O6  1  0.653  0.347  0.269  1.0
  O  O7  1  0.348  0.652  0.228  1.0
  O  O8  1  0.653  0.347  0.731  1.0
  O  O9  1  0.348  0.652  0.772  1.0
  O  O10  1  0.049  0.951  0.500  1.0
[/CIF]
.