The crystal structure described by CaCu2(WO4)2 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms to form CaO6 octahedra that share corners with three equivalent W(1)O4 tetrahedra, corners with three equivalent W(2)O4 tetrahedra, and  an edgeedge with one Ca(1)O6 octahedra. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form WO4 tetrahedra that share corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-54°. In the second W site, W(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form WO4 tetrahedra that share corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-60°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one O(1), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 3-coordinate geometry to one Ca(1), one W(1), and one Cu(1) atom. In the second O site, O(8) is bonded in a distorted trigonal planar geometry to one Ca(1), one W(2), and one Cu(2) atom. In the third O site, O(1) is bonded in a trigonal planar geometry to one Ca(1), one W(1), and one Cu(1) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(2) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ca(1) and one W(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one W(1), and one Cu(2) atom. In the seventh O site, O(5) is bonded in a bent 150 degrees geometry to one W(2) and one Cu(1) atom. In the eighth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one Cu(1), and one Cu(2) atom. is represented by the CIF file [CIF]
data_CaCu2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.059
_cell_length_b   6.802
_cell_length_c   13.189
_cell_angle_alpha   89.301
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   812.584
_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  0.164  0.122  0.047  1.0
  Ca  Ca1  1  0.836  0.878  0.953  1.0
  Ca  Ca2  1  0.664  0.878  0.453  1.0
  Ca  Ca3  1  0.336  0.122  0.547  1.0
  Cu  Cu4  1  0.190  0.765  0.861  1.0
  Cu  Cu5  1  0.049  0.387  0.621  1.0
  Cu  Cu6  1  0.951  0.613  0.379  1.0
  Cu  Cu7  1  0.810  0.235  0.139  1.0
  Cu  Cu8  1  0.310  0.765  0.361  1.0
  Cu  Cu9  1  0.451  0.387  0.121  1.0
  Cu  Cu10  1  0.690  0.235  0.639  1.0
  Cu  Cu11  1  0.549  0.613  0.879  1.0
  W  W12  1  0.458  0.094  0.845  1.0
  W  W13  1  0.042  0.094  0.345  1.0
  W  W14  1  0.077  0.607  0.137  1.0
  W  W15  1  0.958  0.906  0.655  1.0
  W  W16  1  0.923  0.393  0.863  1.0
  W  W17  1  0.577  0.393  0.363  1.0
  W  W18  1  0.423  0.607  0.637  1.0
  W  W19  1  0.542  0.906  0.155  1.0
  O  O20  1  0.229  0.025  0.391  1.0
  O  O21  1  0.003  0.668  0.604  1.0
  O  O22  1  0.566  0.189  0.456  1.0
  O  O23  1  0.066  0.811  0.044  1.0
  O  O24  1  0.271  0.025  0.891  1.0
  O  O25  1  0.771  0.975  0.609  1.0
  O  O26  1  0.095  0.089  0.611  1.0
  O  O27  1  0.898  0.489  0.134  1.0
  O  O28  1  0.602  0.489  0.634  1.0
  O  O29  1  0.881  0.307  0.736  1.0
  O  O30  1  0.381  0.693  0.764  1.0
  O  O31  1  0.102  0.511  0.866  1.0
  O  O32  1  0.905  0.911  0.389  1.0
  O  O33  1  0.538  0.879  0.293  1.0
  O  O34  1  0.280  0.435  0.597  1.0
  O  O35  1  0.220  0.435  0.097  1.0
  O  O36  1  0.038  0.121  0.207  1.0
  O  O37  1  0.398  0.511  0.366  1.0
  O  O38  1  0.462  0.121  0.707  1.0
  O  O39  1  0.434  0.811  0.544  1.0
  O  O40  1  0.497  0.668  0.104  1.0
  O  O41  1  0.119  0.693  0.264  1.0
  O  O42  1  0.729  0.975  0.109  1.0
  O  O43  1  0.405  0.089  0.111  1.0
  O  O44  1  0.934  0.189  0.956  1.0
  O  O45  1  0.780  0.565  0.903  1.0
  O  O46  1  0.997  0.332  0.396  1.0
  O  O47  1  0.503  0.332  0.896  1.0
  O  O48  1  0.595  0.911  0.889  1.0
  O  O49  1  0.720  0.565  0.403  1.0
  O  O50  1  0.619  0.307  0.236  1.0
  O  O51  1  0.962  0.879  0.793  1.0
[/CIF]
.
The crystal structure described by CaCu2(WO4)2 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms to form CaO6 octahedra that share corners with three equivalent W(1)O4 tetrahedra, corners with three equivalent W(2)O4 tetrahedra, and  an edgeedge with one Ca(1)O6 octahedra. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form WO4 tetrahedra that share corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-54°. In the second W site, W(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form WO4 tetrahedra that share corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-60°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one O(1), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 3-coordinate geometry to one Ca(1), one W(1), and one Cu(1) atom. In the second O site, O(8) is bonded in a distorted trigonal planar geometry to one Ca(1), one W(2), and one Cu(2) atom. In the third O site, O(1) is bonded in a trigonal planar geometry to one Ca(1), one W(1), and one Cu(1) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(2) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ca(1) and one W(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one W(1), and one Cu(2) atom. In the seventh O site, O(5) is bonded in a bent 150 degrees geometry to one W(2) and one Cu(1) atom. In the eighth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one Cu(1), and one Cu(2) atom. is represented by the CIF file [CIF]
data_CaCu2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.059
_cell_length_b   6.802
_cell_length_c   13.189
_cell_angle_alpha   89.301
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   812.584
_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  0.164  0.122  0.047  1.0
  Ca  Ca1  1  0.836  0.878  0.953  1.0
  Ca  Ca2  1  0.664  0.878  0.453  1.0
  Ca  Ca3  1  0.336  0.122  0.547  1.0
  Cu  Cu4  1  0.190  0.765  0.861  1.0
  Cu  Cu5  1  0.049  0.387  0.621  1.0
  Cu  Cu6  1  0.951  0.613  0.379  1.0
  Cu  Cu7  1  0.810  0.235  0.139  1.0
  Cu  Cu8  1  0.310  0.765  0.361  1.0
  Cu  Cu9  1  0.451  0.387  0.121  1.0
  Cu  Cu10  1  0.690  0.235  0.639  1.0
  Cu  Cu11  1  0.549  0.613  0.879  1.0
  W  W12  1  0.458  0.094  0.845  1.0
  W  W13  1  0.042  0.094  0.345  1.0
  W  W14  1  0.077  0.607  0.137  1.0
  W  W15  1  0.958  0.906  0.655  1.0
  W  W16  1  0.923  0.393  0.863  1.0
  W  W17  1  0.577  0.393  0.363  1.0
  W  W18  1  0.423  0.607  0.637  1.0
  W  W19  1  0.542  0.906  0.155  1.0
  O  O20  1  0.229  0.025  0.391  1.0
  O  O21  1  0.003  0.668  0.604  1.0
  O  O22  1  0.566  0.189  0.456  1.0
  O  O23  1  0.066  0.811  0.044  1.0
  O  O24  1  0.271  0.025  0.891  1.0
  O  O25  1  0.771  0.975  0.609  1.0
  O  O26  1  0.095  0.089  0.611  1.0
  O  O27  1  0.898  0.489  0.134  1.0
  O  O28  1  0.602  0.489  0.634  1.0
  O  O29  1  0.881  0.307  0.736  1.0
  O  O30  1  0.381  0.693  0.764  1.0
  O  O31  1  0.102  0.511  0.866  1.0
  O  O32  1  0.905  0.911  0.389  1.0
  O  O33  1  0.538  0.879  0.293  1.0
  O  O34  1  0.280  0.435  0.597  1.0
  O  O35  1  0.220  0.435  0.097  1.0
  O  O36  1  0.038  0.121  0.207  1.0
  O  O37  1  0.398  0.511  0.366  1.0
  O  O38  1  0.462  0.121  0.707  1.0
  O  O39  1  0.434  0.811  0.544  1.0
  O  O40  1  0.497  0.668  0.104  1.0
  O  O41  1  0.119  0.693  0.264  1.0
  O  O42  1  0.729  0.975  0.109  1.0
  O  O43  1  0.405  0.089  0.111  1.0
  O  O44  1  0.934  0.189  0.956  1.0
  O  O45  1  0.780  0.565  0.903  1.0
  O  O46  1  0.997  0.332  0.396  1.0
  O  O47  1  0.503  0.332  0.896  1.0
  O  O48  1  0.595  0.911  0.889  1.0
  O  O49  1  0.720  0.565  0.403  1.0
  O  O50  1  0.619  0.307  0.236  1.0
  O  O51  1  0.962  0.879  0.793  1.0
[/CIF]
.