The compound described by Ba4Mg(Fe2O5)2 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), one O(9), and two equivalent O(5) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one Fe(2), one O(1), one O(10), one O(2), one O(3), one O(4), one O(8), one O(9), and two equivalent O(6) atoms. In the third Ba site, Ba(3) is bonded in a 10-coordinate geometry to one Fe(3), one O(10), one O(2), one O(4), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the fourth Ba site, Ba(4) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(3), one O(7), one O(9), two equivalent O(6), and two equivalent O(8) atoms. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Fe(4)O4 tetrahedra and edges with two equivalent Fe(1)O5 square pyramids. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted FeO5 square pyramids that share edges with two equivalent Mg(1)O5 trigonal bipyramids. In the second Fe site, Fe(2) is bonded in a rectangular see-saw-like geometry to one Ba(2), one O(1), one O(2), one O(3), and one O(4) atom. In the third Fe site, Fe(3) is bonded in a rectangular see-saw-like geometry to one Ba(3), one O(10), one O(5), one O(8), and one O(9) atom. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(6), one O(7), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), one Ba(4), one Mg(1), one Fe(1), and one Fe(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Ba(3), one Mg(1), one Fe(1), and one Fe(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Mg(1), one Fe(1), and one Fe(2) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Ba(3), one Mg(1), one Fe(1), and one Fe(2) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(3), one Fe(1), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Ba(2), two equivalent Ba(4), one Mg(1), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), and one Fe(4) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(4), and one Fe(3) atom. In the ninth O site, O(9) is bonded to one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Fe(3), and one Fe(4) atom to form distorted face-sharing OBa4Fe2 octahedra. In the tenth O site, O(10) is bonded to one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Fe(3), and one Fe(4) atom to form distorted face-sharing OBa4Fe2 octahedra. is represented by the CIF card [CIF]
data_Ba4Mg(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.777
_cell_length_b   5.753
_cell_length_c   9.517
_cell_angle_alpha   94.983
_cell_angle_beta   107.169
_cell_angle_gamma   89.499
_symmetry_Int_Tables_number   1
_cell_volume   301.042
_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  0.602  0.099  0.232  1.0
  Ba  Ba1  1  0.363  0.866  0.758  1.0
  Ba  Ba2  1  0.140  0.659  0.310  1.0
  Ba  Ba3  1  0.801  0.274  0.666  1.0
  Mg  Mg4  1  0.966  0.591  0.947  1.0
  Fe  Fe5  1  0.011  0.085  0.042  1.0
  Fe  Fe6  1  0.496  0.534  0.012  1.0
  Fe  Fe7  1  0.214  0.204  0.469  1.0
  Fe  Fe8  1  0.758  0.755  0.532  1.0
  O  O9  1  0.207  0.304  0.966  1.0
  O  O10  1  0.257  0.797  0.046  1.0
  O  O11  1  0.741  0.307  0.965  1.0
  O  O12  1  0.769  0.800  0.047  1.0
  O  O13  1  0.111  0.165  0.250  1.0
  O  O14  1  0.866  0.730  0.744  1.0
  O  O15  1  0.717  0.495  0.397  1.0
  O  O16  1  0.327  0.429  0.626  1.0
  O  O17  1  0.988  0.959  0.498  1.0
  O  O18  1  0.484  0.947  0.492  1.0
[/CIF]
.
The compound described by Ba4Mg(Fe2O5)2 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), one O(9), and two equivalent O(5) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one Fe(2), one O(1), one O(10), one O(2), one O(3), one O(4), one O(8), one O(9), and two equivalent O(6) atoms. In the third Ba site, Ba(3) is bonded in a 10-coordinate geometry to one Fe(3), one O(10), one O(2), one O(4), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the fourth Ba site, Ba(4) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(3), one O(7), one O(9), two equivalent O(6), and two equivalent O(8) atoms. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Fe(4)O4 tetrahedra and edges with two equivalent Fe(1)O5 square pyramids. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted FeO5 square pyramids that share edges with two equivalent Mg(1)O5 trigonal bipyramids. In the second Fe site, Fe(2) is bonded in a rectangular see-saw-like geometry to one Ba(2), one O(1), one O(2), one O(3), and one O(4) atom. In the third Fe site, Fe(3) is bonded in a rectangular see-saw-like geometry to one Ba(3), one O(10), one O(5), one O(8), and one O(9) atom. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(6), one O(7), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), one Ba(4), one Mg(1), one Fe(1), and one Fe(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Ba(3), one Mg(1), one Fe(1), and one Fe(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Ba(4), one Mg(1), one Fe(1), and one Fe(2) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Ba(3), one Mg(1), one Fe(1), and one Fe(2) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(3), one Fe(1), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Ba(2), two equivalent Ba(4), one Mg(1), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), and one Fe(4) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(4), and one Fe(3) atom. In the ninth O site, O(9) is bonded to one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Fe(3), and one Fe(4) atom to form distorted face-sharing OBa4Fe2 octahedra. In the tenth O site, O(10) is bonded to one Ba(1), one Ba(2), one Ba(3), one Ba(4), one Fe(3), and one Fe(4) atom to form distorted face-sharing OBa4Fe2 octahedra. is represented by the CIF card [CIF]
data_Ba4Mg(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.777
_cell_length_b   5.753
_cell_length_c   9.517
_cell_angle_alpha   94.983
_cell_angle_beta   107.169
_cell_angle_gamma   89.499
_symmetry_Int_Tables_number   1
_cell_volume   301.042
_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  0.602  0.099  0.232  1.0
  Ba  Ba1  1  0.363  0.866  0.758  1.0
  Ba  Ba2  1  0.140  0.659  0.310  1.0
  Ba  Ba3  1  0.801  0.274  0.666  1.0
  Mg  Mg4  1  0.966  0.591  0.947  1.0
  Fe  Fe5  1  0.011  0.085  0.042  1.0
  Fe  Fe6  1  0.496  0.534  0.012  1.0
  Fe  Fe7  1  0.214  0.204  0.469  1.0
  Fe  Fe8  1  0.758  0.755  0.532  1.0
  O  O9  1  0.207  0.304  0.966  1.0
  O  O10  1  0.257  0.797  0.046  1.0
  O  O11  1  0.741  0.307  0.965  1.0
  O  O12  1  0.769  0.800  0.047  1.0
  O  O13  1  0.111  0.165  0.250  1.0
  O  O14  1  0.866  0.730  0.744  1.0
  O  O15  1  0.717  0.495  0.397  1.0
  O  O16  1  0.327  0.429  0.626  1.0
  O  O17  1  0.988  0.959  0.498  1.0
  O  O18  1  0.484  0.947  0.492  1.0
[/CIF]
.