The crystal structure described by HfW2O8 crystallizes in the cubic P2_13 space group. Hf(1) is bonded to three equivalent O(3) and three equivalent O(4) atoms to form HfO6 octahedra that share corners with three equivalent W(1)O4 tetrahedra and corners with three equivalent W(2)O5 trigonal bipyramids. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1) and three equivalent O(3) atoms to form WO4 tetrahedra that share corners with three equivalent Hf(1)O6 octahedra and  a cornercorner with one W(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 8°. In the second W site, W(2) is bonded to one O(1), one O(2), and three equivalent O(4) atoms to form distorted WO5 trigonal bipyramids that share corners with three equivalent Hf(1)O6 octahedra and  a cornercorner with one W(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 24°. There are four inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to one Hf(1) and one W(2) atom. In the second O site, O(1) is bonded in a distorted linear geometry to one W(1) and one W(2) atom. In the third O site, O(2) is bonded in a single-bond geometry to one W(2) atom. In the fourth O site, O(3) is bonded in a linear geometry to one Hf(1) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.300
_cell_length_b   9.300
_cell_length_c   9.300
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   804.360
_cell_formula_units_Z   4
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
  Hf  Hf0  1  0.749  0.249  0.251  1.0
  Hf  Hf1  1  0.249  0.251  0.749  1.0
  Hf  Hf2  1  0.251  0.749  0.249  1.0
  Hf  Hf3  1  0.751  0.751  0.751  1.0
  W  W4  1  0.148  0.648  0.852  1.0
  W  W5  1  0.648  0.852  0.148  1.0
  W  W6  1  0.852  0.148  0.648  1.0
  W  W7  1  0.352  0.352  0.352  1.0
  W  W8  1  0.407  0.907  0.593  1.0
  W  W9  1  0.907  0.593  0.407  1.0
  W  W10  1  0.593  0.407  0.907  1.0
  W  W11  1  0.093  0.093  0.093  1.0
  O  O12  1  0.259  0.759  0.741  1.0
  O  O13  1  0.759  0.741  0.259  1.0
  O  O14  1  0.741  0.259  0.759  1.0
  O  O15  1  0.241  0.241  0.241  1.0
  O  O16  1  0.516  0.016  0.484  1.0
  O  O17  1  0.016  0.484  0.516  1.0
  O  O18  1  0.484  0.516  0.016  1.0
  O  O19  1  0.984  0.984  0.984  1.0
  O  O20  1  0.960  0.694  0.819  1.0
  O  O21  1  0.181  0.460  0.806  1.0
  O  O22  1  0.194  0.681  0.040  1.0
  O  O23  1  0.460  0.806  0.181  1.0
  O  O24  1  0.681  0.040  0.194  1.0
  O  O25  1  0.694  0.819  0.960  1.0
  O  O26  1  0.040  0.194  0.681  1.0
  O  O27  1  0.819  0.960  0.694  1.0
  O  O28  1  0.806  0.181  0.460  1.0
  O  O29  1  0.540  0.306  0.319  1.0
  O  O30  1  0.319  0.540  0.306  1.0
  O  O31  1  0.306  0.319  0.540  1.0
  O  O32  1  0.547  0.803  0.689  1.0
  O  O33  1  0.311  0.047  0.697  1.0
  O  O34  1  0.303  0.811  0.453  1.0
  O  O35  1  0.047  0.697  0.311  1.0
  O  O36  1  0.811  0.453  0.303  1.0
  O  O37  1  0.803  0.689  0.547  1.0
  O  O38  1  0.453  0.303  0.811  1.0
  O  O39  1  0.689  0.547  0.803  1.0
  O  O40  1  0.697  0.311  0.047  1.0
  O  O41  1  0.953  0.197  0.189  1.0
  O  O42  1  0.189  0.953  0.197  1.0
  O  O43  1  0.197  0.189  0.953  1.0
[/CIF]
.
The crystal structure described by HfW2O8 crystallizes in the cubic P2_13 space group. Hf(1) is bonded to three equivalent O(3) and three equivalent O(4) atoms to form HfO6 octahedra that share corners with three equivalent W(1)O4 tetrahedra and corners with three equivalent W(2)O5 trigonal bipyramids. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1) and three equivalent O(3) atoms to form WO4 tetrahedra that share corners with three equivalent Hf(1)O6 octahedra and  a cornercorner with one W(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 8°. In the second W site, W(2) is bonded to one O(1), one O(2), and three equivalent O(4) atoms to form distorted WO5 trigonal bipyramids that share corners with three equivalent Hf(1)O6 octahedra and  a cornercorner with one W(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 24°. There are four inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to one Hf(1) and one W(2) atom. In the second O site, O(1) is bonded in a distorted linear geometry to one W(1) and one W(2) atom. In the third O site, O(2) is bonded in a single-bond geometry to one W(2) atom. In the fourth O site, O(3) is bonded in a linear geometry to one Hf(1) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.300
_cell_length_b   9.300
_cell_length_c   9.300
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   804.360
_cell_formula_units_Z   4
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
  Hf  Hf0  1  0.749  0.249  0.251  1.0
  Hf  Hf1  1  0.249  0.251  0.749  1.0
  Hf  Hf2  1  0.251  0.749  0.249  1.0
  Hf  Hf3  1  0.751  0.751  0.751  1.0
  W  W4  1  0.148  0.648  0.852  1.0
  W  W5  1  0.648  0.852  0.148  1.0
  W  W6  1  0.852  0.148  0.648  1.0
  W  W7  1  0.352  0.352  0.352  1.0
  W  W8  1  0.407  0.907  0.593  1.0
  W  W9  1  0.907  0.593  0.407  1.0
  W  W10  1  0.593  0.407  0.907  1.0
  W  W11  1  0.093  0.093  0.093  1.0
  O  O12  1  0.259  0.759  0.741  1.0
  O  O13  1  0.759  0.741  0.259  1.0
  O  O14  1  0.741  0.259  0.759  1.0
  O  O15  1  0.241  0.241  0.241  1.0
  O  O16  1  0.516  0.016  0.484  1.0
  O  O17  1  0.016  0.484  0.516  1.0
  O  O18  1  0.484  0.516  0.016  1.0
  O  O19  1  0.984  0.984  0.984  1.0
  O  O20  1  0.960  0.694  0.819  1.0
  O  O21  1  0.181  0.460  0.806  1.0
  O  O22  1  0.194  0.681  0.040  1.0
  O  O23  1  0.460  0.806  0.181  1.0
  O  O24  1  0.681  0.040  0.194  1.0
  O  O25  1  0.694  0.819  0.960  1.0
  O  O26  1  0.040  0.194  0.681  1.0
  O  O27  1  0.819  0.960  0.694  1.0
  O  O28  1  0.806  0.181  0.460  1.0
  O  O29  1  0.540  0.306  0.319  1.0
  O  O30  1  0.319  0.540  0.306  1.0
  O  O31  1  0.306  0.319  0.540  1.0
  O  O32  1  0.547  0.803  0.689  1.0
  O  O33  1  0.311  0.047  0.697  1.0
  O  O34  1  0.303  0.811  0.453  1.0
  O  O35  1  0.047  0.697  0.311  1.0
  O  O36  1  0.811  0.453  0.303  1.0
  O  O37  1  0.803  0.689  0.547  1.0
  O  O38  1  0.453  0.303  0.811  1.0
  O  O39  1  0.689  0.547  0.803  1.0
  O  O40  1  0.697  0.311  0.047  1.0
  O  O41  1  0.953  0.197  0.189  1.0
  O  O42  1  0.189  0.953  0.197  1.0
  O  O43  1  0.197  0.189  0.953  1.0
[/CIF]
.