The structure described by CrWO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Fmmm space group. There are three inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2) and four O(1,1,1) atoms to form WO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the second W site, W(2) is bonded to two equivalent O(3) and four equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, and edges with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-50°. In the third W site, W(3) is bonded to two equivalent O(5) and four equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the second Cr site, Cr(2) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with two equivalent Cr(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-55°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one W(1) and two equivalent Cr(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one W(2) and two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one W(2), one W(3), and one Cr(2) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one W(2) and two equivalent Cr(1) atoms. In the sixth O site, O(5) is bonded in a trigonal planar geometry to one W(3) and two equivalent Cr(1) atoms. In the seventh O site, O(5) is bonded in a trigonal planar geometry to one W(3) and two equivalent Cr(1) atoms. In the eighth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. In the ninth O site, O(4) is bonded in a distorted trigonal planar geometry to one W(2), one W(3), and one Cr(2) atom. In the tenth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. In the eleventh O site, O(4) is bonded in a distorted trigonal planar geometry to one W(2), one W(3), and one Cr(2) atom. In the twelfth O site, O(3) is bonded in a trigonal planar geometry to one W(2) and two equivalent Cr(1) atoms. In the thirteenth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CrWO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.657
_cell_length_b   5.616
_cell_length_c   5.616
_cell_angle_alpha   67.977
_cell_angle_beta   88.908
_cell_angle_gamma   88.908
_symmetry_Int_Tables_number   1
_cell_volume   136.122
_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
  Cr  Cr0  1  0.500  0.000  0.500  1.0
  Cr  Cr1  1  0.500  0.500  0.000  1.0
  O  O2  1  0.805  0.661  0.143  1.0
  O  O3  1  0.805  0.143  0.661  1.0
  O  O4  1  0.308  0.350  0.350  1.0
  O  O5  1  0.692  0.650  0.650  1.0
  O  O6  1  0.296  0.848  0.848  1.0
  O  O7  1  0.704  0.152  0.152  1.0
  O  O8  1  0.195  0.857  0.339  1.0
  O  O9  1  0.195  0.339  0.857  1.0
  W  W10  1  0.000  0.500  0.500  1.0
  W  W11  1  0.000  0.000  0.000  1.0
[/CIF]
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The structure described by CrWO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Fmmm space group. There are three inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2) and four O(1,1,1) atoms to form WO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the second W site, W(2) is bonded to two equivalent O(3) and four equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, and edges with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-50°. In the third W site, W(3) is bonded to two equivalent O(5) and four equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the second Cr site, Cr(2) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with two equivalent Cr(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-55°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one W(1) and two equivalent Cr(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one W(2) and two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one W(2), one W(3), and one Cr(2) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one W(2) and two equivalent Cr(1) atoms. In the sixth O site, O(5) is bonded in a trigonal planar geometry to one W(3) and two equivalent Cr(1) atoms. In the seventh O site, O(5) is bonded in a trigonal planar geometry to one W(3) and two equivalent Cr(1) atoms. In the eighth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. In the ninth O site, O(4) is bonded in a distorted trigonal planar geometry to one W(2), one W(3), and one Cr(2) atom. In the tenth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. In the eleventh O site, O(4) is bonded in a distorted trigonal planar geometry to one W(2), one W(3), and one Cr(2) atom. In the twelfth O site, O(3) is bonded in a trigonal planar geometry to one W(2) and two equivalent Cr(1) atoms. In the thirteenth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cr(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CrWO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.657
_cell_length_b   5.616
_cell_length_c   5.616
_cell_angle_alpha   67.977
_cell_angle_beta   88.908
_cell_angle_gamma   88.908
_symmetry_Int_Tables_number   1
_cell_volume   136.122
_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
  Cr  Cr0  1  0.500  0.000  0.500  1.0
  Cr  Cr1  1  0.500  0.500  0.000  1.0
  O  O2  1  0.805  0.661  0.143  1.0
  O  O3  1  0.805  0.143  0.661  1.0
  O  O4  1  0.308  0.350  0.350  1.0
  O  O5  1  0.692  0.650  0.650  1.0
  O  O6  1  0.296  0.848  0.848  1.0
  O  O7  1  0.704  0.152  0.152  1.0
  O  O8  1  0.195  0.857  0.339  1.0
  O  O9  1  0.195  0.339  0.857  1.0
  W  W10  1  0.000  0.500  0.500  1.0
  W  W11  1  0.000  0.000  0.000  1.0
[/CIF]
.