The material structure described by KTb(WO4)2 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(4) atoms. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 45°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Tb(1), and one W(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Tb(1), and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), two equivalent Tb(1), and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OK2W2 trigonal pyramids. is represented by the CIF file [CIF]
data_KTb(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.472
_cell_length_b   7.472
_cell_length_c   7.531
_cell_angle_alpha   62.105
_cell_angle_beta   62.105
_cell_angle_gamma   88.527
_symmetry_Int_Tables_number   1
_cell_volume   318.202
_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  0.704  0.296  0.750  1.0
  K  K1  1  0.296  0.704  0.250  1.0
  Tb  Tb2  1  0.272  0.728  0.750  1.0
  Tb  Tb3  1  0.728  0.272  0.250  1.0
  W  W4  1  0.803  0.803  0.234  1.0
  W  W5  1  0.197  0.197  0.266  1.0
  W  W6  1  0.197  0.197  0.766  1.0
  W  W7  1  0.803  0.803  0.734  1.0
  O  O8  1  0.457  0.291  0.186  1.0
  O  O9  1  0.709  0.543  0.314  1.0
  O  O10  1  0.543  0.709  0.814  1.0
  O  O11  1  0.291  0.457  0.686  1.0
  O  O12  1  0.085  0.869  0.971  1.0
  O  O13  1  0.131  0.915  0.529  1.0
  O  O14  1  0.915  0.131  0.029  1.0
  O  O15  1  0.869  0.085  0.471  1.0
  O  O16  1  0.118  0.433  0.126  1.0
  O  O17  1  0.567  0.882  0.374  1.0
  O  O18  1  0.882  0.567  0.874  1.0
  O  O19  1  0.433  0.118  0.626  1.0
  O  O20  1  0.736  0.882  0.945  1.0
  O  O21  1  0.118  0.264  0.555  1.0
  O  O22  1  0.264  0.118  0.055  1.0
  O  O23  1  0.882  0.736  0.445  1.0
[/CIF]
.
The material structure described by KTb(WO4)2 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(4) atoms. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 45°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Tb(1), and one W(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Tb(1), and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), two equivalent Tb(1), and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OK2W2 trigonal pyramids. is represented by the CIF file [CIF]
data_KTb(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.472
_cell_length_b   7.472
_cell_length_c   7.531
_cell_angle_alpha   62.105
_cell_angle_beta   62.105
_cell_angle_gamma   88.527
_symmetry_Int_Tables_number   1
_cell_volume   318.202
_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  0.704  0.296  0.750  1.0
  K  K1  1  0.296  0.704  0.250  1.0
  Tb  Tb2  1  0.272  0.728  0.750  1.0
  Tb  Tb3  1  0.728  0.272  0.250  1.0
  W  W4  1  0.803  0.803  0.234  1.0
  W  W5  1  0.197  0.197  0.266  1.0
  W  W6  1  0.197  0.197  0.766  1.0
  W  W7  1  0.803  0.803  0.734  1.0
  O  O8  1  0.457  0.291  0.186  1.0
  O  O9  1  0.709  0.543  0.314  1.0
  O  O10  1  0.543  0.709  0.814  1.0
  O  O11  1  0.291  0.457  0.686  1.0
  O  O12  1  0.085  0.869  0.971  1.0
  O  O13  1  0.131  0.915  0.529  1.0
  O  O14  1  0.915  0.131  0.029  1.0
  O  O15  1  0.869  0.085  0.471  1.0
  O  O16  1  0.118  0.433  0.126  1.0
  O  O17  1  0.567  0.882  0.374  1.0
  O  O18  1  0.882  0.567  0.874  1.0
  O  O19  1  0.433  0.118  0.626  1.0
  O  O20  1  0.736  0.882  0.945  1.0
  O  O21  1  0.118  0.264  0.555  1.0
  O  O22  1  0.264  0.118  0.055  1.0
  O  O23  1  0.882  0.736  0.445  1.0
[/CIF]
.