The material structure described by Ba2MgMo4(Se2O11)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to one O(11), one O(2), two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(11), two equivalent O(1), two equivalent O(12), two equivalent O(3), and two equivalent O(5) atoms. Mg(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form distorted MgO6 pentagonal pyramids that share corners with two equivalent Mo(1)O6 octahedra and edges with two equivalent Mo(2)O6 octahedra. The corner-sharing octahedral tilt angles are 42°. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(10), one O(2), one O(3), one O(4), one O(5), and one O(9) atom to form distorted MoO6 octahedra that share  a cornercorner with one Mo(1)O6 octahedra and  a cornercorner with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 59°. In the second Mo site, Mo(2) is bonded to one O(1), one O(11), one O(12), one O(6), one O(7), and one O(8) atom to form distorted MoO6 octahedra that share  a cornercorner with one Mo(2)O6 octahedra and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 61°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(4), and one O(7) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(3), and one O(8) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Ba(2), one Mg(1), and one Mo(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1) and two equivalent Mo(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ba(2), one Mo(1), and one Se(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Mo(1), and one Se(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ba(2) and one Mo(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Ba(1), one Mg(1), and one Mo(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Mo(2), and one Se(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mo(2) and one Se(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Mg(1) and one Mo(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mo(1) and one Se(1) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Ba(2), and two equivalent Mo(2) atoms. In the twelfth O site, O(12) is bonded in a distorted trigonal non-coplanar geometry to one Ba(2), one Mo(2), and one Se(2) atom. is represented by the CIF card [CIF]
data_Ba2MgMo4(Se2O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.975
_cell_length_b   8.357
_cell_length_c   9.044
_cell_angle_alpha   117.518
_cell_angle_beta   88.297
_cell_angle_gamma   93.688
_symmetry_Int_Tables_number   1
_cell_volume   533.462
_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
  Ba  Ba0  1  0.693  0.171  0.000  1.0
  Ba  Ba1  1  0.145  0.794  0.000  1.0
  Mg  Mg2  1  0.393  0.446  0.000  1.0
  Mo  Mo3  1  0.651  0.849  0.217  1.0
  Mo  Mo4  1  0.166  0.152  0.784  1.0
  Mo  Mo5  1  0.651  0.633  0.783  1.0
  Mo  Mo6  1  0.166  0.368  0.216  1.0
  Se  Se7  1  0.817  0.311  0.430  1.0
  Se  Se8  1  0.312  0.138  0.414  1.0
  Se  Se9  1  0.817  0.881  0.570  1.0
  Se  Se10  1  0.312  0.724  0.586  1.0
  O  O11  1  0.172  0.550  0.161  1.0
  O  O12  1  0.600  0.846  0.000  1.0
  O  O13  1  0.387  0.937  0.270  1.0
  O  O14  1  0.681  0.851  0.709  1.0
  O  O15  1  0.387  0.667  0.730  1.0
  O  O16  1  0.868  0.823  0.184  1.0
  O  O17  1  0.383  0.314  0.162  1.0
  O  O18  1  0.902  0.379  0.287  1.0
  O  O19  1  0.193  0.054  0.532  1.0
  O  O20  1  0.902  0.092  0.713  1.0
  O  O21  1  0.559  0.463  0.836  1.0
  O  O22  1  0.670  0.475  0.527  1.0
  O  O23  1  0.681  0.142  0.291  1.0
  O  O24  1  0.559  0.627  0.164  1.0
  O  O25  1  0.383  0.151  0.838  1.0
  O  O26  1  0.070  0.175  0.000  1.0
  O  O27  1  0.152  0.148  0.293  1.0
  O  O28  1  0.152  0.855  0.707  1.0
  O  O29  1  0.670  0.948  0.473  1.0
  O  O30  1  0.868  0.639  0.816  1.0
  O  O31  1  0.193  0.522  0.468  1.0
  O  O32  1  0.172  0.389  0.839  1.0
[/CIF]
.
The material structure described by Ba2MgMo4(Se2O11)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to one O(11), one O(2), two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(11), two equivalent O(1), two equivalent O(12), two equivalent O(3), and two equivalent O(5) atoms. Mg(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form distorted MgO6 pentagonal pyramids that share corners with two equivalent Mo(1)O6 octahedra and edges with two equivalent Mo(2)O6 octahedra. The corner-sharing octahedral tilt angles are 42°. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(10), one O(2), one O(3), one O(4), one O(5), and one O(9) atom to form distorted MoO6 octahedra that share  a cornercorner with one Mo(1)O6 octahedra and  a cornercorner with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 59°. In the second Mo site, Mo(2) is bonded to one O(1), one O(11), one O(12), one O(6), one O(7), and one O(8) atom to form distorted MoO6 octahedra that share  a cornercorner with one Mo(2)O6 octahedra and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 61°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(4), and one O(7) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(3), and one O(8) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Ba(2), one Mg(1), and one Mo(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1) and two equivalent Mo(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ba(2), one Mo(1), and one Se(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Mo(1), and one Se(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ba(2) and one Mo(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Ba(1), one Mg(1), and one Mo(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Mo(2), and one Se(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mo(2) and one Se(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Mg(1) and one Mo(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mo(1) and one Se(1) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Ba(2), and two equivalent Mo(2) atoms. In the twelfth O site, O(12) is bonded in a distorted trigonal non-coplanar geometry to one Ba(2), one Mo(2), and one Se(2) atom. is represented by the CIF card [CIF]
data_Ba2MgMo4(Se2O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.975
_cell_length_b   8.357
_cell_length_c   9.044
_cell_angle_alpha   117.518
_cell_angle_beta   88.297
_cell_angle_gamma   93.688
_symmetry_Int_Tables_number   1
_cell_volume   533.462
_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
  Ba  Ba0  1  0.693  0.171  0.000  1.0
  Ba  Ba1  1  0.145  0.794  0.000  1.0
  Mg  Mg2  1  0.393  0.446  0.000  1.0
  Mo  Mo3  1  0.651  0.849  0.217  1.0
  Mo  Mo4  1  0.166  0.152  0.784  1.0
  Mo  Mo5  1  0.651  0.633  0.783  1.0
  Mo  Mo6  1  0.166  0.368  0.216  1.0
  Se  Se7  1  0.817  0.311  0.430  1.0
  Se  Se8  1  0.312  0.138  0.414  1.0
  Se  Se9  1  0.817  0.881  0.570  1.0
  Se  Se10  1  0.312  0.724  0.586  1.0
  O  O11  1  0.172  0.550  0.161  1.0
  O  O12  1  0.600  0.846  0.000  1.0
  O  O13  1  0.387  0.937  0.270  1.0
  O  O14  1  0.681  0.851  0.709  1.0
  O  O15  1  0.387  0.667  0.730  1.0
  O  O16  1  0.868  0.823  0.184  1.0
  O  O17  1  0.383  0.314  0.162  1.0
  O  O18  1  0.902  0.379  0.287  1.0
  O  O19  1  0.193  0.054  0.532  1.0
  O  O20  1  0.902  0.092  0.713  1.0
  O  O21  1  0.559  0.463  0.836  1.0
  O  O22  1  0.670  0.475  0.527  1.0
  O  O23  1  0.681  0.142  0.291  1.0
  O  O24  1  0.559  0.627  0.164  1.0
  O  O25  1  0.383  0.151  0.838  1.0
  O  O26  1  0.070  0.175  0.000  1.0
  O  O27  1  0.152  0.148  0.293  1.0
  O  O28  1  0.152  0.855  0.707  1.0
  O  O29  1  0.670  0.948  0.473  1.0
  O  O30  1  0.868  0.639  0.816  1.0
  O  O31  1  0.193  0.522  0.468  1.0
  O  O32  1  0.172  0.389  0.839  1.0
[/CIF]
.