The structure described by CaW3O7 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. In the second W site, W(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to one Ca(1), one W(2), and two equivalent W(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent W(1) atoms. In the third O site, O(1) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of corner and edge-sharing OCaW3 tetrahedra. In the fourth O site, O(2) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OCaW3 trigonal pyramids. is represented by the CIF file [CIF]
data_CaW3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.356
_cell_length_b   10.188
_cell_length_c   10.642
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   580.730
_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
  Ca  Ca0  1  0.337  0.137  0.250  1.0
  Ca  Ca1  1  0.837  0.363  0.750  1.0
  Ca  Ca2  1  0.663  0.863  0.750  1.0
  Ca  Ca3  1  0.163  0.637  0.250  1.0
  W  W4  1  0.622  0.643  0.016  1.0
  W  W5  1  0.122  0.857  0.984  1.0
  W  W6  1  0.378  0.357  0.516  1.0
  W  W7  1  0.878  0.143  0.484  1.0
  W  W8  1  0.657  0.853  0.250  1.0
  W  W9  1  0.157  0.647  0.750  1.0
  W  W10  1  0.343  0.147  0.750  1.0
  W  W11  1  0.843  0.353  0.250  1.0
  W  W12  1  0.122  0.857  0.516  1.0
  W  W13  1  0.622  0.643  0.484  1.0
  W  W14  1  0.878  0.143  0.016  1.0
  W  W15  1  0.378  0.357  0.984  1.0
  O  O16  1  0.111  0.234  0.885  1.0
  O  O17  1  0.611  0.266  0.115  1.0
  O  O18  1  0.889  0.766  0.385  1.0
  O  O19  1  0.389  0.734  0.615  1.0
  O  O20  1  0.889  0.766  0.115  1.0
  O  O21  1  0.389  0.734  0.885  1.0
  O  O22  1  0.111  0.234  0.615  1.0
  O  O23  1  0.611  0.266  0.385  1.0
  O  O24  1  0.591  0.209  0.882  1.0
  O  O25  1  0.091  0.291  0.118  1.0
  O  O26  1  0.409  0.791  0.382  1.0
  O  O27  1  0.909  0.709  0.618  1.0
  O  O28  1  0.409  0.791  0.118  1.0
  O  O29  1  0.909  0.709  0.882  1.0
  O  O30  1  0.591  0.209  0.618  1.0
  O  O31  1  0.091  0.291  0.382  1.0
  O  O32  1  0.754  0.538  0.250  1.0
  O  O33  1  0.254  0.962  0.750  1.0
  O  O34  1  0.246  0.462  0.750  1.0
  O  O35  1  0.746  0.038  0.250  1.0
  O  O36  1  0.815  0.967  0.569  1.0
  O  O37  1  0.315  0.533  0.431  1.0
  O  O38  1  0.185  0.033  0.069  1.0
  O  O39  1  0.685  0.467  0.931  1.0
  O  O40  1  0.185  0.033  0.431  1.0
  O  O41  1  0.685  0.467  0.569  1.0
  O  O42  1  0.815  0.967  0.931  1.0
  O  O43  1  0.315  0.533  0.069  1.0
[/CIF]
.
The structure described by CaW3O7 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. In the second W site, W(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to one Ca(1), one W(2), and two equivalent W(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent W(1) atoms. In the third O site, O(1) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of corner and edge-sharing OCaW3 tetrahedra. In the fourth O site, O(2) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OCaW3 trigonal pyramids. is represented by the CIF file [CIF]
data_CaW3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.356
_cell_length_b   10.188
_cell_length_c   10.642
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   580.730
_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
  Ca  Ca0  1  0.337  0.137  0.250  1.0
  Ca  Ca1  1  0.837  0.363  0.750  1.0
  Ca  Ca2  1  0.663  0.863  0.750  1.0
  Ca  Ca3  1  0.163  0.637  0.250  1.0
  W  W4  1  0.622  0.643  0.016  1.0
  W  W5  1  0.122  0.857  0.984  1.0
  W  W6  1  0.378  0.357  0.516  1.0
  W  W7  1  0.878  0.143  0.484  1.0
  W  W8  1  0.657  0.853  0.250  1.0
  W  W9  1  0.157  0.647  0.750  1.0
  W  W10  1  0.343  0.147  0.750  1.0
  W  W11  1  0.843  0.353  0.250  1.0
  W  W12  1  0.122  0.857  0.516  1.0
  W  W13  1  0.622  0.643  0.484  1.0
  W  W14  1  0.878  0.143  0.016  1.0
  W  W15  1  0.378  0.357  0.984  1.0
  O  O16  1  0.111  0.234  0.885  1.0
  O  O17  1  0.611  0.266  0.115  1.0
  O  O18  1  0.889  0.766  0.385  1.0
  O  O19  1  0.389  0.734  0.615  1.0
  O  O20  1  0.889  0.766  0.115  1.0
  O  O21  1  0.389  0.734  0.885  1.0
  O  O22  1  0.111  0.234  0.615  1.0
  O  O23  1  0.611  0.266  0.385  1.0
  O  O24  1  0.591  0.209  0.882  1.0
  O  O25  1  0.091  0.291  0.118  1.0
  O  O26  1  0.409  0.791  0.382  1.0
  O  O27  1  0.909  0.709  0.618  1.0
  O  O28  1  0.409  0.791  0.118  1.0
  O  O29  1  0.909  0.709  0.882  1.0
  O  O30  1  0.591  0.209  0.618  1.0
  O  O31  1  0.091  0.291  0.382  1.0
  O  O32  1  0.754  0.538  0.250  1.0
  O  O33  1  0.254  0.962  0.750  1.0
  O  O34  1  0.246  0.462  0.750  1.0
  O  O35  1  0.746  0.038  0.250  1.0
  O  O36  1  0.815  0.967  0.569  1.0
  O  O37  1  0.315  0.533  0.431  1.0
  O  O38  1  0.185  0.033  0.069  1.0
  O  O39  1  0.685  0.467  0.931  1.0
  O  O40  1  0.185  0.033  0.431  1.0
  O  O41  1  0.685  0.467  0.569  1.0
  O  O42  1  0.815  0.967  0.931  1.0
  O  O43  1  0.315  0.533  0.069  1.0
[/CIF]
.