The material structure described by Na3Mg2(MoO4)3 crystallizes in the monoclinic C2/c space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second Na site, Na(2) is bonded in a distorted hexagonal planar geometry to two equivalent O(4) and four equivalent O(3) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent O(5) and four equivalent O(6) atoms. Mg(1) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent Mo(1)O4 tetrahedra, corners with four equivalent Mo(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O6 octahedra. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form MoO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-61°. In the second Mo site, Mo(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form MoO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-63°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Mo(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one Mo(2) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), two equivalent Na(2), and one Mo(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Na(2), one Mg(1), and one Mo(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Na(3), one Mg(1), and one Mo(1) atom. In the sixth O site, O(6) is bonded to two equivalent Na(3), one Mg(1), and one Mo(2) atom to form a mixture of distorted corner and edge-sharing ONa2MgMo trigonal pyramids. is represented by the CIF card [CIF]
data_Na3Mg2(MoO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.203
_cell_length_b   9.203
_cell_length_c   7.192
_cell_angle_alpha   74.790
_cell_angle_beta   74.790
_cell_angle_gamma   95.417
_symmetry_Int_Tables_number   1
_cell_volume   558.410
_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  0.236  0.764  0.250  1.0
  Na  Na1  1  0.764  0.236  0.750  1.0
  Na  Na2  1  0.000  0.000  0.000  1.0
  Na  Na3  1  0.000  0.000  0.500  1.0
  Na  Na4  1  0.529  0.471  0.250  1.0
  Na  Na5  1  0.471  0.529  0.750  1.0
  Mg  Mg6  1  0.555  0.870  0.374  1.0
  Mg  Mg7  1  0.445  0.130  0.626  1.0
  Mg  Mg8  1  0.130  0.445  0.126  1.0
  Mg  Mg9  1  0.870  0.555  0.874  1.0
  Mo  Mo10  1  0.782  0.218  0.250  1.0
  Mo  Mo11  1  0.218  0.782  0.750  1.0
  Mo  Mo12  1  0.379  0.160  0.126  1.0
  Mo  Mo13  1  0.621  0.840  0.874  1.0
  Mo  Mo14  1  0.840  0.621  0.374  1.0
  Mo  Mo15  1  0.160  0.379  0.626  1.0
  O  O16  1  0.456  0.098  0.338  1.0
  O  O17  1  0.544  0.902  0.662  1.0
  O  O18  1  0.902  0.544  0.162  1.0
  O  O19  1  0.098  0.456  0.838  1.0
  O  O20  1  0.506  0.850  0.112  1.0
  O  O21  1  0.494  0.150  0.888  1.0
  O  O22  1  0.150  0.494  0.388  1.0
  O  O23  1  0.850  0.506  0.612  1.0
  O  O24  1  0.204  0.036  0.190  1.0
  O  O25  1  0.796  0.964  0.810  1.0
  O  O26  1  0.964  0.796  0.310  1.0
  O  O27  1  0.036  0.204  0.690  1.0
  O  O28  1  0.757  0.021  0.227  1.0
  O  O29  1  0.243  0.979  0.773  1.0
  O  O30  1  0.979  0.243  0.273  1.0
  O  O31  1  0.021  0.757  0.727  1.0
  O  O32  1  0.658  0.263  0.475  1.0
  O  O33  1  0.342  0.737  0.525  1.0
  O  O34  1  0.737  0.342  0.025  1.0
  O  O35  1  0.263  0.658  0.975  1.0
  O  O36  1  0.647  0.661  0.405  1.0
  O  O37  1  0.353  0.339  0.595  1.0
  O  O38  1  0.339  0.353  0.095  1.0
  O  O39  1  0.661  0.647  0.905  1.0
[/CIF]
.
The material structure described by Na3Mg2(MoO4)3 crystallizes in the monoclinic C2/c space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second Na site, Na(2) is bonded in a distorted hexagonal planar geometry to two equivalent O(4) and four equivalent O(3) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent O(5) and four equivalent O(6) atoms. Mg(1) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent Mo(1)O4 tetrahedra, corners with four equivalent Mo(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O6 octahedra. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form MoO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-61°. In the second Mo site, Mo(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form MoO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-63°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Mo(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one Mo(2) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), two equivalent Na(2), and one Mo(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Na(2), one Mg(1), and one Mo(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Na(3), one Mg(1), and one Mo(1) atom. In the sixth O site, O(6) is bonded to two equivalent Na(3), one Mg(1), and one Mo(2) atom to form a mixture of distorted corner and edge-sharing ONa2MgMo trigonal pyramids. is represented by the CIF card [CIF]
data_Na3Mg2(MoO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.203
_cell_length_b   9.203
_cell_length_c   7.192
_cell_angle_alpha   74.790
_cell_angle_beta   74.790
_cell_angle_gamma   95.417
_symmetry_Int_Tables_number   1
_cell_volume   558.410
_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  0.236  0.764  0.250  1.0
  Na  Na1  1  0.764  0.236  0.750  1.0
  Na  Na2  1  0.000  0.000  0.000  1.0
  Na  Na3  1  0.000  0.000  0.500  1.0
  Na  Na4  1  0.529  0.471  0.250  1.0
  Na  Na5  1  0.471  0.529  0.750  1.0
  Mg  Mg6  1  0.555  0.870  0.374  1.0
  Mg  Mg7  1  0.445  0.130  0.626  1.0
  Mg  Mg8  1  0.130  0.445  0.126  1.0
  Mg  Mg9  1  0.870  0.555  0.874  1.0
  Mo  Mo10  1  0.782  0.218  0.250  1.0
  Mo  Mo11  1  0.218  0.782  0.750  1.0
  Mo  Mo12  1  0.379  0.160  0.126  1.0
  Mo  Mo13  1  0.621  0.840  0.874  1.0
  Mo  Mo14  1  0.840  0.621  0.374  1.0
  Mo  Mo15  1  0.160  0.379  0.626  1.0
  O  O16  1  0.456  0.098  0.338  1.0
  O  O17  1  0.544  0.902  0.662  1.0
  O  O18  1  0.902  0.544  0.162  1.0
  O  O19  1  0.098  0.456  0.838  1.0
  O  O20  1  0.506  0.850  0.112  1.0
  O  O21  1  0.494  0.150  0.888  1.0
  O  O22  1  0.150  0.494  0.388  1.0
  O  O23  1  0.850  0.506  0.612  1.0
  O  O24  1  0.204  0.036  0.190  1.0
  O  O25  1  0.796  0.964  0.810  1.0
  O  O26  1  0.964  0.796  0.310  1.0
  O  O27  1  0.036  0.204  0.690  1.0
  O  O28  1  0.757  0.021  0.227  1.0
  O  O29  1  0.243  0.979  0.773  1.0
  O  O30  1  0.979  0.243  0.273  1.0
  O  O31  1  0.021  0.757  0.727  1.0
  O  O32  1  0.658  0.263  0.475  1.0
  O  O33  1  0.342  0.737  0.525  1.0
  O  O34  1  0.737  0.342  0.025  1.0
  O  O35  1  0.263  0.658  0.975  1.0
  O  O36  1  0.647  0.661  0.405  1.0
  O  O37  1  0.353  0.339  0.595  1.0
  O  O38  1  0.339  0.353  0.095  1.0
  O  O39  1  0.661  0.647  0.905  1.0
[/CIF]
.