The structure described by CaWO2 crystallizes in the triclinic P-1 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(3), and two equivalent O(4) atoms. In the second Ca site, Ca(2) is bonded in a 5-coordinate geometry to one O(3), one O(4), and three equivalent O(2) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second W site, W(2) is bonded in a distorted pentagonal planar geometry to one O(1), two equivalent O(2), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Ca(1), one W(2), and two equivalent W(1) atoms. In the second O site, O(2) is bonded to three equivalent Ca(2), one W(1), and two equivalent W(2) atoms to form OCa3W3 octahedra that share  a cornercorner with one O(3)Ca3W2 trigonal bipyramid, corners with four equivalent O(4)Ca3W2 trigonal bipyramids, edges with four equivalent O(2)Ca3W3 octahedra, edges with two equivalent O(3)Ca3W2 trigonal bipyramids, and  a faceface with one O(4)Ca3W2 trigonal bipyramid. In the third O site, O(3) is bonded to one Ca(2), two equivalent Ca(1), and two equivalent W(1) atoms to form distorted OCa3W2 trigonal bipyramids that share  a cornercorner with one O(2)Ca3W3 octahedra, corners with three equivalent O(4)Ca3W2 trigonal bipyramids, edges with two equivalent O(2)Ca3W3 octahedra,  an edgeedge with one O(4)Ca3W2 trigonal bipyramid, and edges with two equivalent O(3)Ca3W2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 19°. In the fourth O site, O(4) is bonded to one Ca(2), two equivalent Ca(1), and two equivalent W(2) atoms to form distorted OCa3W2 trigonal bipyramids that share corners with four equivalent O(2)Ca3W3 octahedra, corners with three equivalent O(3)Ca3W2 trigonal bipyramids,  an edgeedge with one O(3)Ca3W2 trigonal bipyramid, edges with two equivalent O(4)Ca3W2 trigonal bipyramids, and  a faceface with one O(2)Ca3W3 octahedra. The corner-sharing octahedral tilt angles range from 43-54°. is represented by the CIF card [CIF]
data_CaWO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.963
_cell_length_b   8.621
_cell_length_c   8.896
_cell_angle_alpha   88.953
_cell_angle_beta   99.378
_cell_angle_gamma   99.060
_symmetry_Int_Tables_number   1
_cell_volume   221.435
_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  0.846  0.478  0.732  1.0
  Ca  Ca1  1  0.154  0.522  0.268  1.0
  Ca  Ca2  1  0.655  0.815  0.974  1.0
  Ca  Ca3  1  0.345  0.185  0.026  1.0
  W  W4  1  0.067  0.172  0.391  1.0
  W  W5  1  0.670  0.113  0.695  1.0
  W  W6  1  0.330  0.887  0.305  1.0
  W  W7  1  0.933  0.828  0.609  1.0
  O  O8  1  0.319  0.705  0.466  1.0
  O  O9  1  0.858  0.034  0.172  1.0
  O  O10  1  0.142  0.966  0.828  1.0
  O  O11  1  0.681  0.295  0.534  1.0
  O  O12  1  0.552  0.314  0.256  1.0
  O  O13  1  0.288  0.280  0.793  1.0
  O  O14  1  0.448  0.686  0.744  1.0
  O  O15  1  0.712  0.720  0.207  1.0
[/CIF]
.
The structure described by CaWO2 crystallizes in the triclinic P-1 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(3), and two equivalent O(4) atoms. In the second Ca site, Ca(2) is bonded in a 5-coordinate geometry to one O(3), one O(4), and three equivalent O(2) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second W site, W(2) is bonded in a distorted pentagonal planar geometry to one O(1), two equivalent O(2), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Ca(1), one W(2), and two equivalent W(1) atoms. In the second O site, O(2) is bonded to three equivalent Ca(2), one W(1), and two equivalent W(2) atoms to form OCa3W3 octahedra that share  a cornercorner with one O(3)Ca3W2 trigonal bipyramid, corners with four equivalent O(4)Ca3W2 trigonal bipyramids, edges with four equivalent O(2)Ca3W3 octahedra, edges with two equivalent O(3)Ca3W2 trigonal bipyramids, and  a faceface with one O(4)Ca3W2 trigonal bipyramid. In the third O site, O(3) is bonded to one Ca(2), two equivalent Ca(1), and two equivalent W(1) atoms to form distorted OCa3W2 trigonal bipyramids that share  a cornercorner with one O(2)Ca3W3 octahedra, corners with three equivalent O(4)Ca3W2 trigonal bipyramids, edges with two equivalent O(2)Ca3W3 octahedra,  an edgeedge with one O(4)Ca3W2 trigonal bipyramid, and edges with two equivalent O(3)Ca3W2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 19°. In the fourth O site, O(4) is bonded to one Ca(2), two equivalent Ca(1), and two equivalent W(2) atoms to form distorted OCa3W2 trigonal bipyramids that share corners with four equivalent O(2)Ca3W3 octahedra, corners with three equivalent O(3)Ca3W2 trigonal bipyramids,  an edgeedge with one O(3)Ca3W2 trigonal bipyramid, edges with two equivalent O(4)Ca3W2 trigonal bipyramids, and  a faceface with one O(2)Ca3W3 octahedra. The corner-sharing octahedral tilt angles range from 43-54°. is represented by the CIF card [CIF]
data_CaWO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.963
_cell_length_b   8.621
_cell_length_c   8.896
_cell_angle_alpha   88.953
_cell_angle_beta   99.378
_cell_angle_gamma   99.060
_symmetry_Int_Tables_number   1
_cell_volume   221.435
_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  0.846  0.478  0.732  1.0
  Ca  Ca1  1  0.154  0.522  0.268  1.0
  Ca  Ca2  1  0.655  0.815  0.974  1.0
  Ca  Ca3  1  0.345  0.185  0.026  1.0
  W  W4  1  0.067  0.172  0.391  1.0
  W  W5  1  0.670  0.113  0.695  1.0
  W  W6  1  0.330  0.887  0.305  1.0
  W  W7  1  0.933  0.828  0.609  1.0
  O  O8  1  0.319  0.705  0.466  1.0
  O  O9  1  0.858  0.034  0.172  1.0
  O  O10  1  0.142  0.966  0.828  1.0
  O  O11  1  0.681  0.295  0.534  1.0
  O  O12  1  0.552  0.314  0.256  1.0
  O  O13  1  0.288  0.280  0.793  1.0
  O  O14  1  0.448  0.686  0.744  1.0
  O  O15  1  0.712  0.720  0.207  1.0
[/CIF]
.