The material structure described by Na4Mg(Mo2O5)2 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(6), and one O(8) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(5), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(6), one O(8), and one O(9) atom. Mg(1) is bonded to one O(1), one O(10), one O(2), one O(4), one O(5), and one O(7) atom to form distorted MgO6 octahedra that share  a cornercorner with one Mo(1)O6 octahedra, corners with two equivalent Mo(4)O4 trigonal pyramids, edges with two equivalent Mo(2)O6 octahedra, and  a faceface with one Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles are 63°. There are four inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form MoO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with four equivalent Mo(2)O6 octahedra,  a cornercorner with one Mo(4)O4 trigonal pyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-63°. In the second Mo site, Mo(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form MoO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra,  a cornercorner with one Mo(4)O4 trigonal pyramid, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-42°. In the third Mo site, Mo(3) is bonded in a 4-coordinate geometry to one O(10), one O(5), one O(8), and one O(9) atom. In the fourth Mo site, Mo(4) is bonded to one O(10), one O(6), one O(7), and one O(9) atom to form distorted MoO4 trigonal pyramids that share  a cornercorner with one Mo(1)O6 octahedra,  a cornercorner with one Mo(2)O6 octahedra, and corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-64°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(3), one Mg(1), one Mo(1), and one Mo(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), one Mo(1), and one Mo(2) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Mo(1), and one Mo(2) atom to form ONa2Mo2 trigonal pyramids that share  a cornercorner with one O(4)Na3MgMo2 octahedra,  a cornercorner with one O(9)Na3Mo2 square pyramid,  a cornercorner with one O(10)Na2MgMo2 trigonal bipyramid,  an edgeedge with one O(5)Na2MgMo2 trigonal bipyramid, and  a faceface with one O(4)Na3MgMo2 octahedra. The corner-sharing octahedral tilt angles are 85°. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(4), one Mg(1), one Mo(1), and one Mo(2) atom to form distorted ONa3MgMo2 octahedra that share corners with two equivalent O(9)Na3Mo2 square pyramids, corners with two equivalent O(10)Na2MgMo2 trigonal bipyramids,  a cornercorner with one O(3)Na2Mo2 trigonal pyramid,  a faceface with one O(5)Na2MgMo2 trigonal bipyramid, and  a faceface with one O(3)Na2Mo2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Mg(1), one Mo(1), and one Mo(3) atom to form ONa2MgMo2 trigonal bipyramids that share  a cornercorner with one O(9)Na3Mo2 square pyramid,  a cornercorner with one O(10)Na2MgMo2 trigonal bipyramid,  an edgeedge with one O(9)Na3Mo2 square pyramid,  an edgeedge with one O(10)Na2MgMo2 trigonal bipyramid,  an edgeedge with one O(3)Na2Mo2 trigonal pyramid, and  a faceface with one O(4)Na3MgMo2 octahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Na(2), one Na(4), one Mo(1), and one Mo(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one Mo(2), and one Mo(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(2), one Na(4), one Mo(2), and one Mo(3) atom. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Na(4), one Mo(3), and one Mo(4) atom to form distorted ONa3Mo2 square pyramids that share corners with two equivalent O(4)Na3MgMo2 octahedra,  a cornercorner with one O(5)Na2MgMo2 trigonal bipyramid, corners with three equivalent O(10)Na2MgMo2 trigonal bipyramids,  a cornercorner with one O(3)Na2Mo2 trigonal pyramid, and  an edgeedge with one O(5)Na2MgMo2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 38-58°. In the tenth O site, O(10) is bonded to one Na(2), one Na(3), one Mg(1), one Mo(3), and one Mo(4) atom to form distorted ONa2MgMo2 trigonal bipyramids that share corners with two equivalent O(4)Na3MgMo2 octahedra, corners with three equivalent O(9)Na3Mo2 square pyramids,  a cornercorner with one O(5)Na2MgMo2 trigonal bipyramid,  a cornercorner with one O(3)Na2Mo2 trigonal pyramid, and  an edgeedge with one O(5)Na2MgMo2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-56°. is represented by the CIF file [CIF]
data_Na4Mg(Mo2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.635
_cell_length_b   5.923
_cell_length_c   8.681
_cell_angle_alpha   108.586
_cell_angle_beta   109.209
_cell_angle_gamma   91.040
_symmetry_Int_Tables_number   1
_cell_volume   256.872
_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  0.389  0.930  0.827  1.0
  Na  Na1  1  0.632  0.081  0.231  1.0
  Na  Na2  1  0.602  0.055  0.625  1.0
  Na  Na3  1  0.111  0.712  0.230  1.0
  Mg  Mg4  1  0.930  0.523  0.824  1.0
  Mo  Mo5  1  0.022  0.039  0.007  1.0
  Mo  Mo6  1  0.511  0.504  0.992  1.0
  Mo  Mo7  1  0.852  0.644  0.495  1.0
  Mo  Mo8  1  0.256  0.407  0.510  1.0
  O  O9  1  0.778  0.290  0.918  1.0
  O  O10  1  0.722  0.761  0.957  1.0
  O  O11  1  0.348  0.258  0.047  1.0
  O  O12  1  0.255  0.742  0.026  1.0
  O  O13  1  0.948  0.835  0.736  1.0
  O  O14  1  0.102  0.149  0.288  1.0
  O  O15  1  0.248  0.366  0.725  1.0
  O  O16  1  0.725  0.628  0.265  1.0
  O  O17  1  0.245  0.744  0.520  1.0
  O  O18  1  0.649  0.395  0.542  1.0
[/CIF]
.
The material structure described by Na4Mg(Mo2O5)2 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(6), and one O(8) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(5), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(6), one O(8), and one O(9) atom. Mg(1) is bonded to one O(1), one O(10), one O(2), one O(4), one O(5), and one O(7) atom to form distorted MgO6 octahedra that share  a cornercorner with one Mo(1)O6 octahedra, corners with two equivalent Mo(4)O4 trigonal pyramids, edges with two equivalent Mo(2)O6 octahedra, and  a faceface with one Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles are 63°. There are four inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form MoO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with four equivalent Mo(2)O6 octahedra,  a cornercorner with one Mo(4)O4 trigonal pyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-63°. In the second Mo site, Mo(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form MoO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra,  a cornercorner with one Mo(4)O4 trigonal pyramid, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-42°. In the third Mo site, Mo(3) is bonded in a 4-coordinate geometry to one O(10), one O(5), one O(8), and one O(9) atom. In the fourth Mo site, Mo(4) is bonded to one O(10), one O(6), one O(7), and one O(9) atom to form distorted MoO4 trigonal pyramids that share  a cornercorner with one Mo(1)O6 octahedra,  a cornercorner with one Mo(2)O6 octahedra, and corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-64°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(3), one Mg(1), one Mo(1), and one Mo(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), one Mo(1), and one Mo(2) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Mo(1), and one Mo(2) atom to form ONa2Mo2 trigonal pyramids that share  a cornercorner with one O(4)Na3MgMo2 octahedra,  a cornercorner with one O(9)Na3Mo2 square pyramid,  a cornercorner with one O(10)Na2MgMo2 trigonal bipyramid,  an edgeedge with one O(5)Na2MgMo2 trigonal bipyramid, and  a faceface with one O(4)Na3MgMo2 octahedra. The corner-sharing octahedral tilt angles are 85°. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(4), one Mg(1), one Mo(1), and one Mo(2) atom to form distorted ONa3MgMo2 octahedra that share corners with two equivalent O(9)Na3Mo2 square pyramids, corners with two equivalent O(10)Na2MgMo2 trigonal bipyramids,  a cornercorner with one O(3)Na2Mo2 trigonal pyramid,  a faceface with one O(5)Na2MgMo2 trigonal bipyramid, and  a faceface with one O(3)Na2Mo2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Mg(1), one Mo(1), and one Mo(3) atom to form ONa2MgMo2 trigonal bipyramids that share  a cornercorner with one O(9)Na3Mo2 square pyramid,  a cornercorner with one O(10)Na2MgMo2 trigonal bipyramid,  an edgeedge with one O(9)Na3Mo2 square pyramid,  an edgeedge with one O(10)Na2MgMo2 trigonal bipyramid,  an edgeedge with one O(3)Na2Mo2 trigonal pyramid, and  a faceface with one O(4)Na3MgMo2 octahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Na(2), one Na(4), one Mo(1), and one Mo(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one Mo(2), and one Mo(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(2), one Na(4), one Mo(2), and one Mo(3) atom. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Na(4), one Mo(3), and one Mo(4) atom to form distorted ONa3Mo2 square pyramids that share corners with two equivalent O(4)Na3MgMo2 octahedra,  a cornercorner with one O(5)Na2MgMo2 trigonal bipyramid, corners with three equivalent O(10)Na2MgMo2 trigonal bipyramids,  a cornercorner with one O(3)Na2Mo2 trigonal pyramid, and  an edgeedge with one O(5)Na2MgMo2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 38-58°. In the tenth O site, O(10) is bonded to one Na(2), one Na(3), one Mg(1), one Mo(3), and one Mo(4) atom to form distorted ONa2MgMo2 trigonal bipyramids that share corners with two equivalent O(4)Na3MgMo2 octahedra, corners with three equivalent O(9)Na3Mo2 square pyramids,  a cornercorner with one O(5)Na2MgMo2 trigonal bipyramid,  a cornercorner with one O(3)Na2Mo2 trigonal pyramid, and  an edgeedge with one O(5)Na2MgMo2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-56°. is represented by the CIF file [CIF]
data_Na4Mg(Mo2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.635
_cell_length_b   5.923
_cell_length_c   8.681
_cell_angle_alpha   108.586
_cell_angle_beta   109.209
_cell_angle_gamma   91.040
_symmetry_Int_Tables_number   1
_cell_volume   256.872
_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  0.389  0.930  0.827  1.0
  Na  Na1  1  0.632  0.081  0.231  1.0
  Na  Na2  1  0.602  0.055  0.625  1.0
  Na  Na3  1  0.111  0.712  0.230  1.0
  Mg  Mg4  1  0.930  0.523  0.824  1.0
  Mo  Mo5  1  0.022  0.039  0.007  1.0
  Mo  Mo6  1  0.511  0.504  0.992  1.0
  Mo  Mo7  1  0.852  0.644  0.495  1.0
  Mo  Mo8  1  0.256  0.407  0.510  1.0
  O  O9  1  0.778  0.290  0.918  1.0
  O  O10  1  0.722  0.761  0.957  1.0
  O  O11  1  0.348  0.258  0.047  1.0
  O  O12  1  0.255  0.742  0.026  1.0
  O  O13  1  0.948  0.835  0.736  1.0
  O  O14  1  0.102  0.149  0.288  1.0
  O  O15  1  0.248  0.366  0.725  1.0
  O  O16  1  0.725  0.628  0.265  1.0
  O  O17  1  0.245  0.744  0.520  1.0
  O  O18  1  0.649  0.395  0.542  1.0
[/CIF]
.