The material described by La7(FeO8)2 crystallizes in the monoclinic Cm space group. There are five inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(7), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(6), one O(7), one O(9), and two equivalent O(5) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), one O(8), one O(9), and two equivalent O(4) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(10), one O(7), one O(8), two equivalent O(3), two equivalent O(5), and two equivalent O(9) atoms. In the fifth La site, La(5) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(8), two equivalent O(3), two equivalent O(4), and two equivalent O(9) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in an octahedral geometry to one O(1), one O(10), two equivalent O(2), and two equivalent O(3) atoms. In the second Fe site, Fe(2) is bonded in an octahedral geometry to one O(7), one O(8), two equivalent O(6), and two equivalent O(9) atoms. There are ten inequivalent O sites. In the first O site, O(10) is bonded to one La(1), one La(4), one La(5), two equivalent La(2), and one Fe(1) atom to form distorted OLa5Fe octahedra that share  a cornercorner with one O(1)La4Fe square pyramid, corners with two equivalent O(3)La4Fe square pyramids, corners with four equivalent O(7)La4Fe square pyramids, corners with six equivalent O(9)La4Fe square pyramids,  an edgeedge with one O(1)La4Fe square pyramid,  an edgeedge with one O(8)La4Fe square pyramid, edges with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(3)La4Fe square pyramids. In the second O site, O(1) is bonded to one La(1), one La(5), two equivalent La(3), and one Fe(1) atom to form distorted OLa4Fe square pyramids that share  a cornercorner with one O(10)La5Fe octahedra,  a cornercorner with one O(7)La4Fe square pyramid, corners with three equivalent O(8)La4Fe square pyramids, corners with four equivalent O(9)La4Fe square pyramids, corners with two equivalent O(4)La4 tetrahedra,  an edgeedge with one O(10)La5Fe octahedra, edges with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(3)La4Fe square pyramids. The corner-sharing octahedral tilt angles are 4°. In the third O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(2), one La(3), and one Fe(1) atom. In the fourth O site, O(3) is bonded to one La(2), one La(3), one La(4), one La(5), and one Fe(1) atom to form distorted OLa4Fe square pyramids that share  a cornercorner with one O(10)La5Fe octahedra, corners with two equivalent O(7)La4Fe square pyramids, corners with three equivalent O(8)La4Fe square pyramids, corners with three equivalent O(4)La4 tetrahedra, edges with three equivalent O(9)La4Fe square pyramids,  an edgeedge with one O(4)La4 tetrahedra,  a faceface with one O(10)La5Fe octahedra,  a faceface with one O(1)La4Fe square pyramid, and  a faceface with one O(3)La4Fe square pyramid. The corner-sharing octahedral tilt angles are 45°. In the fifth O site, O(4) is bonded to one La(2), one La(5), and two equivalent La(3) atoms to form distorted OLa4 tetrahedra that share  a cornercorner with one O(1)La4Fe square pyramid,  a cornercorner with one O(7)La4Fe square pyramid,  a cornercorner with one O(8)La4Fe square pyramid, corners with three equivalent O(3)La4Fe square pyramids, corners with three equivalent O(9)La4Fe square pyramids, corners with three equivalent O(4)La4 tetrahedra,  an edgeedge with one O(10)La5Fe octahedra,  an edgeedge with one O(1)La4Fe square pyramid,  an edgeedge with one O(3)La4Fe square pyramid,  an edgeedge with one O(8)La4Fe square pyramid, and  an edgeedge with one O(9)La4Fe square pyramid. In the sixth O site, O(5) is bonded in a 5-coordinate geometry to one La(1), one La(3), one La(4), and two equivalent La(2) atoms. In the seventh O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(2), one La(3), and one Fe(2) atom. In the eighth O site, O(7) is bonded to one La(1), one La(4), two equivalent La(2), and one Fe(2) atom to form distorted OLa4Fe square pyramids that share corners with four equivalent O(10)La5Fe octahedra,  a cornercorner with one O(1)La4Fe square pyramid, corners with two equivalent O(8)La4Fe square pyramids, corners with four equivalent O(3)La4Fe square pyramids, corners with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(9)La4Fe square pyramids. The corner-sharing octahedral tilt angles range from 8-22°. In the ninth O site, O(8) is bonded to one La(4), one La(5), two equivalent La(3), and one Fe(2) atom to form distorted OLa4Fe square pyramids that share corners with two equivalent O(7)La4Fe square pyramids, corners with two equivalent O(9)La4Fe square pyramids, corners with three equivalent O(1)La4Fe square pyramids, corners with six equivalent O(3)La4Fe square pyramids, corners with two equivalent O(4)La4 tetrahedra,  an edgeedge with one O(10)La5Fe octahedra, edges with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(9)La4Fe square pyramids. In the tenth O site, O(9) is bonded to one La(2), one La(3), one La(4), one La(5), and one Fe(2) atom to form distorted OLa4Fe square pyramids that share corners with three equivalent O(10)La5Fe octahedra,  a cornercorner with one O(8)La4Fe square pyramid, corners with two equivalent O(1)La4Fe square pyramids, corners with three equivalent O(4)La4 tetrahedra, edges with three equivalent O(3)La4Fe square pyramids,  an edgeedge with one O(4)La4 tetrahedra,  a faceface with one O(7)La4Fe square pyramid,  a faceface with one O(8)La4Fe square pyramid, and  a faceface with one O(9)La4Fe square pyramid. The corner-sharing octahedral tilt angles range from 47-55°. is represented by the Crystallographic Information File (CIF) [CIF]
data_La7(FeO8)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.608
_cell_length_b   7.608
_cell_length_c   6.953
_cell_angle_alpha   74.247
_cell_angle_beta   74.247
_cell_angle_gamma   90.626
_symmetry_Int_Tables_number   1
_cell_volume   371.181
_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
  La  La0  1  0.804  0.804  0.775  1.0
  La  La1  1  0.821  0.319  0.722  1.0
  La  La2  1  0.682  0.182  0.268  1.0
  La  La3  1  0.323  0.323  0.722  1.0
  La  La4  1  0.319  0.821  0.722  1.0
  La  La5  1  0.182  0.682  0.268  1.0
  La  La6  1  0.180  0.180  0.275  1.0
  Fe  Fe7  1  0.998  0.998  0.006  1.0
  Fe  Fe8  1  0.498  0.498  0.008  1.0
  O  O9  1  0.936  0.936  0.306  1.0
  O  O10  1  0.010  0.763  0.988  1.0
  O  O11  1  0.007  0.245  0.990  1.0
  O  O12  1  0.942  0.368  0.380  1.0
  O  O13  1  0.587  0.105  0.621  1.0
  O  O14  1  0.741  0.494  0.996  1.0
  O  O15  1  0.763  0.010  0.988  1.0
  O  O16  1  0.573  0.573  0.704  1.0
  O  O17  1  0.406  0.406  0.319  1.0
  O  O18  1  0.496  0.257  0.997  1.0
  O  O19  1  0.494  0.741  0.996  1.0
  O  O20  1  0.368  0.942  0.380  1.0
  O  O21  1  0.105  0.587  0.621  1.0
  O  O22  1  0.245  0.007  0.990  1.0
  O  O23  1  0.081  0.081  0.684  1.0
  O  O24  1  0.257  0.496  0.997  1.0
[/CIF]
.
The material described by La7(FeO8)2 crystallizes in the monoclinic Cm space group. There are five inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(7), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(6), one O(7), one O(9), and two equivalent O(5) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), one O(8), one O(9), and two equivalent O(4) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(10), one O(7), one O(8), two equivalent O(3), two equivalent O(5), and two equivalent O(9) atoms. In the fifth La site, La(5) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(8), two equivalent O(3), two equivalent O(4), and two equivalent O(9) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in an octahedral geometry to one O(1), one O(10), two equivalent O(2), and two equivalent O(3) atoms. In the second Fe site, Fe(2) is bonded in an octahedral geometry to one O(7), one O(8), two equivalent O(6), and two equivalent O(9) atoms. There are ten inequivalent O sites. In the first O site, O(10) is bonded to one La(1), one La(4), one La(5), two equivalent La(2), and one Fe(1) atom to form distorted OLa5Fe octahedra that share  a cornercorner with one O(1)La4Fe square pyramid, corners with two equivalent O(3)La4Fe square pyramids, corners with four equivalent O(7)La4Fe square pyramids, corners with six equivalent O(9)La4Fe square pyramids,  an edgeedge with one O(1)La4Fe square pyramid,  an edgeedge with one O(8)La4Fe square pyramid, edges with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(3)La4Fe square pyramids. In the second O site, O(1) is bonded to one La(1), one La(5), two equivalent La(3), and one Fe(1) atom to form distorted OLa4Fe square pyramids that share  a cornercorner with one O(10)La5Fe octahedra,  a cornercorner with one O(7)La4Fe square pyramid, corners with three equivalent O(8)La4Fe square pyramids, corners with four equivalent O(9)La4Fe square pyramids, corners with two equivalent O(4)La4 tetrahedra,  an edgeedge with one O(10)La5Fe octahedra, edges with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(3)La4Fe square pyramids. The corner-sharing octahedral tilt angles are 4°. In the third O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(2), one La(3), and one Fe(1) atom. In the fourth O site, O(3) is bonded to one La(2), one La(3), one La(4), one La(5), and one Fe(1) atom to form distorted OLa4Fe square pyramids that share  a cornercorner with one O(10)La5Fe octahedra, corners with two equivalent O(7)La4Fe square pyramids, corners with three equivalent O(8)La4Fe square pyramids, corners with three equivalent O(4)La4 tetrahedra, edges with three equivalent O(9)La4Fe square pyramids,  an edgeedge with one O(4)La4 tetrahedra,  a faceface with one O(10)La5Fe octahedra,  a faceface with one O(1)La4Fe square pyramid, and  a faceface with one O(3)La4Fe square pyramid. The corner-sharing octahedral tilt angles are 45°. In the fifth O site, O(4) is bonded to one La(2), one La(5), and two equivalent La(3) atoms to form distorted OLa4 tetrahedra that share  a cornercorner with one O(1)La4Fe square pyramid,  a cornercorner with one O(7)La4Fe square pyramid,  a cornercorner with one O(8)La4Fe square pyramid, corners with three equivalent O(3)La4Fe square pyramids, corners with three equivalent O(9)La4Fe square pyramids, corners with three equivalent O(4)La4 tetrahedra,  an edgeedge with one O(10)La5Fe octahedra,  an edgeedge with one O(1)La4Fe square pyramid,  an edgeedge with one O(3)La4Fe square pyramid,  an edgeedge with one O(8)La4Fe square pyramid, and  an edgeedge with one O(9)La4Fe square pyramid. In the sixth O site, O(5) is bonded in a 5-coordinate geometry to one La(1), one La(3), one La(4), and two equivalent La(2) atoms. In the seventh O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(2), one La(3), and one Fe(2) atom. In the eighth O site, O(7) is bonded to one La(1), one La(4), two equivalent La(2), and one Fe(2) atom to form distorted OLa4Fe square pyramids that share corners with four equivalent O(10)La5Fe octahedra,  a cornercorner with one O(1)La4Fe square pyramid, corners with two equivalent O(8)La4Fe square pyramids, corners with four equivalent O(3)La4Fe square pyramids, corners with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(9)La4Fe square pyramids. The corner-sharing octahedral tilt angles range from 8-22°. In the ninth O site, O(8) is bonded to one La(4), one La(5), two equivalent La(3), and one Fe(2) atom to form distorted OLa4Fe square pyramids that share corners with two equivalent O(7)La4Fe square pyramids, corners with two equivalent O(9)La4Fe square pyramids, corners with three equivalent O(1)La4Fe square pyramids, corners with six equivalent O(3)La4Fe square pyramids, corners with two equivalent O(4)La4 tetrahedra,  an edgeedge with one O(10)La5Fe octahedra, edges with two equivalent O(4)La4 tetrahedra, and faces with two equivalent O(9)La4Fe square pyramids. In the tenth O site, O(9) is bonded to one La(2), one La(3), one La(4), one La(5), and one Fe(2) atom to form distorted OLa4Fe square pyramids that share corners with three equivalent O(10)La5Fe octahedra,  a cornercorner with one O(8)La4Fe square pyramid, corners with two equivalent O(1)La4Fe square pyramids, corners with three equivalent O(4)La4 tetrahedra, edges with three equivalent O(3)La4Fe square pyramids,  an edgeedge with one O(4)La4 tetrahedra,  a faceface with one O(7)La4Fe square pyramid,  a faceface with one O(8)La4Fe square pyramid, and  a faceface with one O(9)La4Fe square pyramid. The corner-sharing octahedral tilt angles range from 47-55°. is represented by the Crystallographic Information File (CIF) [CIF]
data_La7(FeO8)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.608
_cell_length_b   7.608
_cell_length_c   6.953
_cell_angle_alpha   74.247
_cell_angle_beta   74.247
_cell_angle_gamma   90.626
_symmetry_Int_Tables_number   1
_cell_volume   371.181
_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
  La  La0  1  0.804  0.804  0.775  1.0
  La  La1  1  0.821  0.319  0.722  1.0
  La  La2  1  0.682  0.182  0.268  1.0
  La  La3  1  0.323  0.323  0.722  1.0
  La  La4  1  0.319  0.821  0.722  1.0
  La  La5  1  0.182  0.682  0.268  1.0
  La  La6  1  0.180  0.180  0.275  1.0
  Fe  Fe7  1  0.998  0.998  0.006  1.0
  Fe  Fe8  1  0.498  0.498  0.008  1.0
  O  O9  1  0.936  0.936  0.306  1.0
  O  O10  1  0.010  0.763  0.988  1.0
  O  O11  1  0.007  0.245  0.990  1.0
  O  O12  1  0.942  0.368  0.380  1.0
  O  O13  1  0.587  0.105  0.621  1.0
  O  O14  1  0.741  0.494  0.996  1.0
  O  O15  1  0.763  0.010  0.988  1.0
  O  O16  1  0.573  0.573  0.704  1.0
  O  O17  1  0.406  0.406  0.319  1.0
  O  O18  1  0.496  0.257  0.997  1.0
  O  O19  1  0.494  0.741  0.996  1.0
  O  O20  1  0.368  0.942  0.380  1.0
  O  O21  1  0.105  0.587  0.621  1.0
  O  O22  1  0.245  0.007  0.990  1.0
  O  O23  1  0.081  0.081  0.684  1.0
  O  O24  1  0.257  0.496  0.997  1.0
[/CIF]
.