The compound described by Mg(MoO2)2 crystallizes in the orthorhombic Pnma space group. Mg(1) is bonded to one O(2), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted MgO7 pentagonal bipyramids that share corners with four equivalent Mo(1)O6 octahedra, corners with six equivalent Mo(2)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra, edges with three equivalent Mo(1)O6 octahedra,  a faceface with one Mo(2)O6 octahedra, and faces with two equivalent Mg(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 28-68°. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form MoO6 octahedra that share corners with four equivalent Mo(2)O6 octahedra, corners with four equivalent Mg(1)O7 pentagonal bipyramids, edges with four equivalent Mo(1)O6 octahedra, and edges with three equivalent Mg(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 53-65°. In the second Mo site, Mo(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form MoO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra, corners with six equivalent Mg(1)O7 pentagonal bipyramids, edges with four equivalent Mo(2)O6 octahedra,  an edgeedge with one Mg(1)O7 pentagonal bipyramid, and  a faceface with one Mg(1)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 53-65°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and three equivalent Mo(2) atoms to form distorted OMg2Mo3 trigonal bipyramids that share  a cornercorner with one O(2)MgMo3 tetrahedra, corners with two equivalent O(3)Mg2Mo3 trigonal bipyramids, corners with six equivalent O(4)Mg2Mo3 trigonal bipyramids, edges with two equivalent O(2)MgMo3 tetrahedra,  an edgeedge with one O(3)Mg2Mo3 trigonal bipyramid, edges with two equivalent O(4)Mg2Mo3 trigonal bipyramids, and edges with four equivalent O(1)Mg2Mo3 trigonal bipyramids. In the second O site, O(2) is bonded to one Mg(1), one Mo(2), and two equivalent Mo(1) atoms to form OMgMo3 tetrahedra that share corners with two equivalent O(2)MgMo3 tetrahedra,  a cornercorner with one O(1)Mg2Mo3 trigonal bipyramid, corners with two equivalent O(4)Mg2Mo3 trigonal bipyramids, corners with six equivalent O(3)Mg2Mo3 trigonal bipyramids,  an edgeedge with one O(3)Mg2Mo3 trigonal bipyramid, edges with two equivalent O(1)Mg2Mo3 trigonal bipyramids, and edges with two equivalent O(4)Mg2Mo3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Mg(1) and three equivalent Mo(1) atoms to form OMg2Mo3 trigonal bipyramids that share corners with six equivalent O(2)MgMo3 tetrahedra, corners with two equivalent O(1)Mg2Mo3 trigonal bipyramids, corners with five equivalent O(4)Mg2Mo3 trigonal bipyramids,  an edgeedge with one O(2)MgMo3 tetrahedra,  an edgeedge with one O(1)Mg2Mo3 trigonal bipyramid,  an edgeedge with one O(4)Mg2Mo3 trigonal bipyramid, and edges with four equivalent O(3)Mg2Mo3 trigonal bipyramids. In the fourth O site, O(4) is bonded to two equivalent Mg(1), one Mo(1), and two equivalent Mo(2) atoms to form distorted OMg2Mo3 trigonal bipyramids that share corners with two equivalent O(2)MgMo3 tetrahedra, corners with five equivalent O(3)Mg2Mo3 trigonal bipyramids, corners with six equivalent O(1)Mg2Mo3 trigonal bipyramids, edges with two equivalent O(2)MgMo3 tetrahedra,  an edgeedge with one O(3)Mg2Mo3 trigonal bipyramid, edges with two equivalent O(1)Mg2Mo3 trigonal bipyramids, and edges with two equivalent O(4)Mg2Mo3 trigonal bipyramids. is represented by the CIF file [CIF]
data_Mg(MoO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.140
_cell_length_b   9.614
_cell_length_c   11.028
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   332.957
_cell_formula_units_Z   4
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
  Mg  Mg0  1  0.750  0.748  0.842  1.0
  Mg  Mg1  1  0.250  0.252  0.158  1.0
  Mg  Mg2  1  0.750  0.248  0.658  1.0
  Mg  Mg3  1  0.250  0.752  0.342  1.0
  Mo  Mo4  1  0.250  0.898  0.599  1.0
  Mo  Mo5  1  0.750  0.602  0.099  1.0
  Mo  Mo6  1  0.250  0.398  0.901  1.0
  Mo  Mo7  1  0.750  0.102  0.401  1.0
  Mo  Mo8  1  0.750  0.050  0.878  1.0
  Mo  Mo9  1  0.250  0.950  0.122  1.0
  Mo  Mo10  1  0.750  0.550  0.622  1.0
  Mo  Mo11  1  0.250  0.450  0.378  1.0
  O  O12  1  0.250  0.400  0.571  1.0
  O  O13  1  0.750  0.600  0.429  1.0
  O  O14  1  0.250  0.900  0.929  1.0
  O  O15  1  0.750  0.100  0.071  1.0
  O  O16  1  0.250  0.575  0.222  1.0
  O  O17  1  0.750  0.425  0.778  1.0
  O  O18  1  0.250  0.075  0.278  1.0
  O  O19  1  0.750  0.925  0.722  1.0
  O  O20  1  0.250  0.119  0.546  1.0
  O  O21  1  0.750  0.881  0.454  1.0
  O  O22  1  0.250  0.619  0.954  1.0
  O  O23  1  0.750  0.381  0.046  1.0
  O  O24  1  0.750  0.310  0.314  1.0
  O  O25  1  0.250  0.690  0.686  1.0
  O  O26  1  0.250  0.190  0.814  1.0
  O  O27  1  0.750  0.810  0.186  1.0
[/CIF]
.
The compound described by Mg(MoO2)2 crystallizes in the orthorhombic Pnma space group. Mg(1) is bonded to one O(2), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted MgO7 pentagonal bipyramids that share corners with four equivalent Mo(1)O6 octahedra, corners with six equivalent Mo(2)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra, edges with three equivalent Mo(1)O6 octahedra,  a faceface with one Mo(2)O6 octahedra, and faces with two equivalent Mg(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 28-68°. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form MoO6 octahedra that share corners with four equivalent Mo(2)O6 octahedra, corners with four equivalent Mg(1)O7 pentagonal bipyramids, edges with four equivalent Mo(1)O6 octahedra, and edges with three equivalent Mg(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 53-65°. In the second Mo site, Mo(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form MoO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra, corners with six equivalent Mg(1)O7 pentagonal bipyramids, edges with four equivalent Mo(2)O6 octahedra,  an edgeedge with one Mg(1)O7 pentagonal bipyramid, and  a faceface with one Mg(1)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 53-65°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and three equivalent Mo(2) atoms to form distorted OMg2Mo3 trigonal bipyramids that share  a cornercorner with one O(2)MgMo3 tetrahedra, corners with two equivalent O(3)Mg2Mo3 trigonal bipyramids, corners with six equivalent O(4)Mg2Mo3 trigonal bipyramids, edges with two equivalent O(2)MgMo3 tetrahedra,  an edgeedge with one O(3)Mg2Mo3 trigonal bipyramid, edges with two equivalent O(4)Mg2Mo3 trigonal bipyramids, and edges with four equivalent O(1)Mg2Mo3 trigonal bipyramids. In the second O site, O(2) is bonded to one Mg(1), one Mo(2), and two equivalent Mo(1) atoms to form OMgMo3 tetrahedra that share corners with two equivalent O(2)MgMo3 tetrahedra,  a cornercorner with one O(1)Mg2Mo3 trigonal bipyramid, corners with two equivalent O(4)Mg2Mo3 trigonal bipyramids, corners with six equivalent O(3)Mg2Mo3 trigonal bipyramids,  an edgeedge with one O(3)Mg2Mo3 trigonal bipyramid, edges with two equivalent O(1)Mg2Mo3 trigonal bipyramids, and edges with two equivalent O(4)Mg2Mo3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Mg(1) and three equivalent Mo(1) atoms to form OMg2Mo3 trigonal bipyramids that share corners with six equivalent O(2)MgMo3 tetrahedra, corners with two equivalent O(1)Mg2Mo3 trigonal bipyramids, corners with five equivalent O(4)Mg2Mo3 trigonal bipyramids,  an edgeedge with one O(2)MgMo3 tetrahedra,  an edgeedge with one O(1)Mg2Mo3 trigonal bipyramid,  an edgeedge with one O(4)Mg2Mo3 trigonal bipyramid, and edges with four equivalent O(3)Mg2Mo3 trigonal bipyramids. In the fourth O site, O(4) is bonded to two equivalent Mg(1), one Mo(1), and two equivalent Mo(2) atoms to form distorted OMg2Mo3 trigonal bipyramids that share corners with two equivalent O(2)MgMo3 tetrahedra, corners with five equivalent O(3)Mg2Mo3 trigonal bipyramids, corners with six equivalent O(1)Mg2Mo3 trigonal bipyramids, edges with two equivalent O(2)MgMo3 tetrahedra,  an edgeedge with one O(3)Mg2Mo3 trigonal bipyramid, edges with two equivalent O(1)Mg2Mo3 trigonal bipyramids, and edges with two equivalent O(4)Mg2Mo3 trigonal bipyramids. is represented by the CIF file [CIF]
data_Mg(MoO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.140
_cell_length_b   9.614
_cell_length_c   11.028
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   332.957
_cell_formula_units_Z   4
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
  Mg  Mg0  1  0.750  0.748  0.842  1.0
  Mg  Mg1  1  0.250  0.252  0.158  1.0
  Mg  Mg2  1  0.750  0.248  0.658  1.0
  Mg  Mg3  1  0.250  0.752  0.342  1.0
  Mo  Mo4  1  0.250  0.898  0.599  1.0
  Mo  Mo5  1  0.750  0.602  0.099  1.0
  Mo  Mo6  1  0.250  0.398  0.901  1.0
  Mo  Mo7  1  0.750  0.102  0.401  1.0
  Mo  Mo8  1  0.750  0.050  0.878  1.0
  Mo  Mo9  1  0.250  0.950  0.122  1.0
  Mo  Mo10  1  0.750  0.550  0.622  1.0
  Mo  Mo11  1  0.250  0.450  0.378  1.0
  O  O12  1  0.250  0.400  0.571  1.0
  O  O13  1  0.750  0.600  0.429  1.0
  O  O14  1  0.250  0.900  0.929  1.0
  O  O15  1  0.750  0.100  0.071  1.0
  O  O16  1  0.250  0.575  0.222  1.0
  O  O17  1  0.750  0.425  0.778  1.0
  O  O18  1  0.250  0.075  0.278  1.0
  O  O19  1  0.750  0.925  0.722  1.0
  O  O20  1  0.250  0.119  0.546  1.0
  O  O21  1  0.750  0.881  0.454  1.0
  O  O22  1  0.250  0.619  0.954  1.0
  O  O23  1  0.750  0.381  0.046  1.0
  O  O24  1  0.750  0.310  0.314  1.0
  O  O25  1  0.250  0.690  0.686  1.0
  O  O26  1  0.250  0.190  0.814  1.0
  O  O27  1  0.750  0.810  0.186  1.0
[/CIF]
.