The material described by Ba2MgY2(Fe2O5)2 crystallizes in the triclinic P1 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(6), one O(8), two equivalent O(10), two equivalent O(2), and two equivalent O(9) atoms. In the second Ba site, Ba(2) is bonded in a 6-coordinate geometry to one O(3), one O(8), two equivalent O(10), and two equivalent O(9) atoms. Mg(1) is bonded to one O(10), one O(5), one O(7), and two equivalent O(3) atoms to form MgO5 trigonal bipyramids that share  a cornercorner with one Fe(2)O5 trigonal bipyramid, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Y(1)O6 octahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms to form distorted YO6 octahedra that share corners with two equivalent Y(1)O6 octahedra,  an edgeedge with one Mg(1)O5 trigonal bipyramid, and edges with two equivalent Fe(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 44°. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one O(5), one O(6), one O(7), one O(8), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a distorted square co-planar geometry to one O(1), one O(3), and two equivalent O(7) atoms. In the second Fe site, Fe(2) is bonded to one O(10), one O(2), one O(4), and two equivalent O(8) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O5 trigonal bipyramid, corners with two equivalent Fe(2)O5 trigonal bipyramids, and edges with two equivalent Y(1)O6 octahedra. In the third Fe site, Fe(3) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(9), and two equivalent O(6) atoms. In the fourth Fe site, Fe(4) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(5) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Y(2), one Fe(1), and one Fe(4) atom to form distorted OY2Fe2 tetrahedra that share corners with two equivalent O(1)Y2Fe2 tetrahedra and edges with two equivalent O(5)Y2MgFe2 trigonal bipyramids. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(2), one Fe(2), and one Fe(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ba(2), two equivalent Mg(1), one Fe(1), and one Fe(4) atom. In the fourth O site, O(4) is bonded to two equivalent Y(1), one Fe(2), and one Fe(3) atom to form OY2Fe2 tetrahedra that share  a cornercorner with one O(10)Ba4MgFe octahedra,  a cornercorner with one O(9)Ba4Fe square pyramid, corners with two equivalent O(4)Y2Fe2 tetrahedra, and corners with two equivalent O(5)Y2MgFe2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 56°. In the fifth O site, O(5) is bonded to one Mg(1), one Y(1), one Y(2), and two equivalent Fe(4) atoms to form OY2MgFe2 trigonal bipyramids that share  a cornercorner with one O(10)Ba4MgFe octahedra, corners with two equivalent O(4)Y2Fe2 tetrahedra, corners with two equivalent O(5)Y2MgFe2 trigonal bipyramids, and edges with two equivalent O(1)Y2Fe2 tetrahedra. The corner-sharing octahedral tilt angles are 49°. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Y(1), one Y(2), and two equivalent Fe(3) atoms. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Y(1), one Y(2), and two equivalent Fe(1) atoms. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Y(1), one Y(2), and two equivalent Fe(2) atoms. In the ninth O site, O(9) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Fe(3) atom to form distorted OBa4Fe square pyramids that share corners with four equivalent O(10)Ba4MgFe octahedra,  a cornercorner with one O(4)Y2Fe2 tetrahedra, edges with two equivalent O(10)Ba4MgFe octahedra, and edges with two equivalent O(9)Ba4Fe square pyramids. The corner-sharing octahedral tilt angles range from 3-12°. In the tenth O site, O(10) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Mg(1), and one Fe(2) atom to form distorted OBa4MgFe octahedra that share corners with four equivalent O(9)Ba4Fe square pyramids,  a cornercorner with one O(4)Y2Fe2 tetrahedra,  a cornercorner with one O(5)Y2MgFe2 trigonal bipyramid, edges with two equivalent O(10)Ba4MgFe octahedra, and edges with two equivalent O(9)Ba4Fe square pyramids. is represented by the CIF card [CIF]
data_Ba2Y2Mg(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.049
_cell_length_b   9.631
_cell_length_c   7.650
_cell_angle_alpha   80.302
_cell_angle_beta   89.752
_cell_angle_gamma   78.216
_symmetry_Int_Tables_number   1
_cell_volume   287.701
_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  0.152  0.071  0.563  1.0
  Ba  Ba1  1  0.176  0.048  0.070  1.0
  Y  Y2  1  0.960  0.464  0.993  1.0
  Y  Y3  1  0.960  0.457  0.499  1.0
  Mg  Mg4  1  0.791  0.807  0.893  1.0
  Fe  Fe5  1  0.353  0.680  0.186  1.0
  Fe  Fe6  1  0.557  0.264  0.794  1.0
  Fe  Fe7  1  0.557  0.265  0.271  1.0
  Fe  Fe8  1  0.355  0.677  0.683  1.0
  O  O9  1  0.385  0.615  0.448  1.0
  O  O10  1  0.530  0.313  0.524  1.0
  O  O11  1  0.304  0.780  0.907  1.0
  O  O12  1  0.503  0.377  0.002  1.0
  O  O13  1  0.873  0.641  0.732  1.0
  O  O14  1  0.023  0.337  0.271  1.0
  O  O15  1  0.861  0.663  0.139  1.0
  O  O16  1  0.040  0.304  0.781  1.0
  O  O17  1  0.667  0.055  0.302  1.0
  O  O18  1  0.686  0.025  0.824  1.0
[/CIF]
.
The material described by Ba2MgY2(Fe2O5)2 crystallizes in the triclinic P1 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(6), one O(8), two equivalent O(10), two equivalent O(2), and two equivalent O(9) atoms. In the second Ba site, Ba(2) is bonded in a 6-coordinate geometry to one O(3), one O(8), two equivalent O(10), and two equivalent O(9) atoms. Mg(1) is bonded to one O(10), one O(5), one O(7), and two equivalent O(3) atoms to form MgO5 trigonal bipyramids that share  a cornercorner with one Fe(2)O5 trigonal bipyramid, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Y(1)O6 octahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms to form distorted YO6 octahedra that share corners with two equivalent Y(1)O6 octahedra,  an edgeedge with one Mg(1)O5 trigonal bipyramid, and edges with two equivalent Fe(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 44°. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one O(5), one O(6), one O(7), one O(8), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a distorted square co-planar geometry to one O(1), one O(3), and two equivalent O(7) atoms. In the second Fe site, Fe(2) is bonded to one O(10), one O(2), one O(4), and two equivalent O(8) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O5 trigonal bipyramid, corners with two equivalent Fe(2)O5 trigonal bipyramids, and edges with two equivalent Y(1)O6 octahedra. In the third Fe site, Fe(3) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(9), and two equivalent O(6) atoms. In the fourth Fe site, Fe(4) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(5) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Y(2), one Fe(1), and one Fe(4) atom to form distorted OY2Fe2 tetrahedra that share corners with two equivalent O(1)Y2Fe2 tetrahedra and edges with two equivalent O(5)Y2MgFe2 trigonal bipyramids. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(2), one Fe(2), and one Fe(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ba(2), two equivalent Mg(1), one Fe(1), and one Fe(4) atom. In the fourth O site, O(4) is bonded to two equivalent Y(1), one Fe(2), and one Fe(3) atom to form OY2Fe2 tetrahedra that share  a cornercorner with one O(10)Ba4MgFe octahedra,  a cornercorner with one O(9)Ba4Fe square pyramid, corners with two equivalent O(4)Y2Fe2 tetrahedra, and corners with two equivalent O(5)Y2MgFe2 trigonal bipyramids. The corner-sharing octahedral tilt angles are 56°. In the fifth O site, O(5) is bonded to one Mg(1), one Y(1), one Y(2), and two equivalent Fe(4) atoms to form OY2MgFe2 trigonal bipyramids that share  a cornercorner with one O(10)Ba4MgFe octahedra, corners with two equivalent O(4)Y2Fe2 tetrahedra, corners with two equivalent O(5)Y2MgFe2 trigonal bipyramids, and edges with two equivalent O(1)Y2Fe2 tetrahedra. The corner-sharing octahedral tilt angles are 49°. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Y(1), one Y(2), and two equivalent Fe(3) atoms. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Y(1), one Y(2), and two equivalent Fe(1) atoms. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Y(1), one Y(2), and two equivalent Fe(2) atoms. In the ninth O site, O(9) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Fe(3) atom to form distorted OBa4Fe square pyramids that share corners with four equivalent O(10)Ba4MgFe octahedra,  a cornercorner with one O(4)Y2Fe2 tetrahedra, edges with two equivalent O(10)Ba4MgFe octahedra, and edges with two equivalent O(9)Ba4Fe square pyramids. The corner-sharing octahedral tilt angles range from 3-12°. In the tenth O site, O(10) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Mg(1), and one Fe(2) atom to form distorted OBa4MgFe octahedra that share corners with four equivalent O(9)Ba4Fe square pyramids,  a cornercorner with one O(4)Y2Fe2 tetrahedra,  a cornercorner with one O(5)Y2MgFe2 trigonal bipyramid, edges with two equivalent O(10)Ba4MgFe octahedra, and edges with two equivalent O(9)Ba4Fe square pyramids. is represented by the CIF card [CIF]
data_Ba2Y2Mg(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.049
_cell_length_b   9.631
_cell_length_c   7.650
_cell_angle_alpha   80.302
_cell_angle_beta   89.752
_cell_angle_gamma   78.216
_symmetry_Int_Tables_number   1
_cell_volume   287.701
_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  0.152  0.071  0.563  1.0
  Ba  Ba1  1  0.176  0.048  0.070  1.0
  Y  Y2  1  0.960  0.464  0.993  1.0
  Y  Y3  1  0.960  0.457  0.499  1.0
  Mg  Mg4  1  0.791  0.807  0.893  1.0
  Fe  Fe5  1  0.353  0.680  0.186  1.0
  Fe  Fe6  1  0.557  0.264  0.794  1.0
  Fe  Fe7  1  0.557  0.265  0.271  1.0
  Fe  Fe8  1  0.355  0.677  0.683  1.0
  O  O9  1  0.385  0.615  0.448  1.0
  O  O10  1  0.530  0.313  0.524  1.0
  O  O11  1  0.304  0.780  0.907  1.0
  O  O12  1  0.503  0.377  0.002  1.0
  O  O13  1  0.873  0.641  0.732  1.0
  O  O14  1  0.023  0.337  0.271  1.0
  O  O15  1  0.861  0.663  0.139  1.0
  O  O16  1  0.040  0.304  0.781  1.0
  O  O17  1  0.667  0.055  0.302  1.0
  O  O18  1  0.686  0.025  0.824  1.0
[/CIF]
.