The crystal structure described by Na4Mg(WO4)2 crystallizes in the monoclinic Cm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(6), two equivalent O(2), and two equivalent O(5) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(5) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(5) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a distorted see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. In the second W site, W(2) is bonded in an octahedral geometry to one O(4), one O(6), two equivalent O(2), and two equivalent O(5) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(3), two equivalent Na(2), one Mg(1), and one W(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Mg(1), and one W(1) atom. In the fourth O site, O(4) is bonded to one Na(3), two equivalent Na(2), and one W(2) atom to form a mixture of corner and edge-sharing ONa3W tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Mg(1), and one W(2) atom. In the sixth O site, O(6) is bonded to one Na(1), two equivalent Na(2), and one W(2) atom to form a mixture of corner and edge-sharing ONa3W tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Mg(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.560
_cell_length_b   6.560
_cell_length_c   6.718
_cell_angle_alpha   59.098
_cell_angle_beta   59.098
_cell_angle_gamma   59.174
_symmetry_Int_Tables_number   1
_cell_volume   200.364
_cell_formula_units_Z   1
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  0.009  0.009  0.516  1.0
  Na  Na1  1  0.898  0.455  0.065  1.0
  Na  Na2  1  0.455  0.898  0.065  1.0
  Na  Na3  1  0.010  0.010  0.944  1.0
  Mg  Mg4  1  0.424  0.424  0.816  1.0
  W  W5  1  0.317  0.317  0.423  1.0
  W  W6  1  0.737  0.737  0.503  1.0
  O  O7  1  0.271  0.271  0.749  1.0
  O  O8  1  0.163  0.676  0.320  1.0
  O  O9  1  0.676  0.163  0.320  1.0
  O  O10  1  0.270  0.270  0.191  1.0
  O  O11  1  0.770  0.770  0.194  1.0
  O  O12  1  0.800  0.362  0.659  1.0
  O  O13  1  0.362  0.800  0.659  1.0
  O  O14  1  0.769  0.769  0.747  1.0
[/CIF]
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The crystal structure described by Na4Mg(WO4)2 crystallizes in the monoclinic Cm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(6), two equivalent O(2), and two equivalent O(5) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(5) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(5) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a distorted see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. In the second W site, W(2) is bonded in an octahedral geometry to one O(4), one O(6), two equivalent O(2), and two equivalent O(5) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(3), two equivalent Na(2), one Mg(1), and one W(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Mg(1), and one W(1) atom. In the fourth O site, O(4) is bonded to one Na(3), two equivalent Na(2), and one W(2) atom to form a mixture of corner and edge-sharing ONa3W tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Mg(1), and one W(2) atom. In the sixth O site, O(6) is bonded to one Na(1), two equivalent Na(2), and one W(2) atom to form a mixture of corner and edge-sharing ONa3W tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Mg(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.560
_cell_length_b   6.560
_cell_length_c   6.718
_cell_angle_alpha   59.098
_cell_angle_beta   59.098
_cell_angle_gamma   59.174
_symmetry_Int_Tables_number   1
_cell_volume   200.364
_cell_formula_units_Z   1
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  0.009  0.009  0.516  1.0
  Na  Na1  1  0.898  0.455  0.065  1.0
  Na  Na2  1  0.455  0.898  0.065  1.0
  Na  Na3  1  0.010  0.010  0.944  1.0
  Mg  Mg4  1  0.424  0.424  0.816  1.0
  W  W5  1  0.317  0.317  0.423  1.0
  W  W6  1  0.737  0.737  0.503  1.0
  O  O7  1  0.271  0.271  0.749  1.0
  O  O8  1  0.163  0.676  0.320  1.0
  O  O9  1  0.676  0.163  0.320  1.0
  O  O10  1  0.270  0.270  0.191  1.0
  O  O11  1  0.770  0.770  0.194  1.0
  O  O12  1  0.800  0.362  0.659  1.0
  O  O13  1  0.362  0.800  0.659  1.0
  O  O14  1  0.769  0.769  0.747  1.0
[/CIF]
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