The structure described by NaCr(WO4)2 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Na(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form distorted NaO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-57°. W(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted WO6 octahedra that share corners with four equivalent Na(1)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-57°. Cr(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. There are four 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 Na(1) and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one W(1) and two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaCr(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.806
_cell_length_b   5.084
_cell_length_c   9.980
_cell_angle_alpha   89.150
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   294.576
_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
  Na  Na0  1  0.687  0.750  0.500  1.0
  Na  Na1  1  0.313  0.250  0.500  1.0
  Cr  Cr2  1  0.648  0.750  0.000  1.0
  Cr  Cr3  1  0.352  0.250  0.000  1.0
  W  W4  1  0.175  0.763  0.766  1.0
  W  W5  1  0.175  0.737  0.234  1.0
  W  W6  1  0.825  0.237  0.234  1.0
  W  W7  1  0.825  0.263  0.766  1.0
  O  O8  1  0.124  0.080  0.877  1.0
  O  O9  1  0.124  0.420  0.123  1.0
  O  O10  1  0.876  0.920  0.123  1.0
  O  O11  1  0.876  0.580  0.877  1.0
  O  O12  1  0.091  0.450  0.672  1.0
  O  O13  1  0.091  0.050  0.328  1.0
  O  O14  1  0.909  0.550  0.328  1.0
  O  O15  1  0.909  0.950  0.672  1.0
  O  O16  1  0.379  0.591  0.893  1.0
  O  O17  1  0.379  0.909  0.107  1.0
  O  O18  1  0.621  0.409  0.107  1.0
  O  O19  1  0.621  0.091  0.893  1.0
  O  O20  1  0.624  0.380  0.647  1.0
  O  O21  1  0.624  0.120  0.353  1.0
  O  O22  1  0.376  0.620  0.353  1.0
  O  O23  1  0.376  0.880  0.647  1.0
[/CIF]
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The structure described by NaCr(WO4)2 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Na(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form distorted NaO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-57°. W(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted WO6 octahedra that share corners with four equivalent Na(1)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-57°. Cr(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. There are four 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 Na(1) and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one W(1) and two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaCr(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.806
_cell_length_b   5.084
_cell_length_c   9.980
_cell_angle_alpha   89.150
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   294.576
_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
  Na  Na0  1  0.687  0.750  0.500  1.0
  Na  Na1  1  0.313  0.250  0.500  1.0
  Cr  Cr2  1  0.648  0.750  0.000  1.0
  Cr  Cr3  1  0.352  0.250  0.000  1.0
  W  W4  1  0.175  0.763  0.766  1.0
  W  W5  1  0.175  0.737  0.234  1.0
  W  W6  1  0.825  0.237  0.234  1.0
  W  W7  1  0.825  0.263  0.766  1.0
  O  O8  1  0.124  0.080  0.877  1.0
  O  O9  1  0.124  0.420  0.123  1.0
  O  O10  1  0.876  0.920  0.123  1.0
  O  O11  1  0.876  0.580  0.877  1.0
  O  O12  1  0.091  0.450  0.672  1.0
  O  O13  1  0.091  0.050  0.328  1.0
  O  O14  1  0.909  0.550  0.328  1.0
  O  O15  1  0.909  0.950  0.672  1.0
  O  O16  1  0.379  0.591  0.893  1.0
  O  O17  1  0.379  0.909  0.107  1.0
  O  O18  1  0.621  0.409  0.107  1.0
  O  O19  1  0.621  0.091  0.893  1.0
  O  O20  1  0.624  0.380  0.647  1.0
  O  O21  1  0.624  0.120  0.353  1.0
  O  O22  1  0.376  0.620  0.353  1.0
  O  O23  1  0.376  0.880  0.647  1.0
[/CIF]
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