The compound described by MgLa4MnO8 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent La sites. In the first La site, La(1) is bonded to one O(7), two equivalent O(5), and two equivalent O(6) atoms to form distorted LaO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent La(1)O5 trigonal bipyramids, and edges with two equivalent La(4)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 80-81°. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms. In the third La site, La(3) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), two equivalent O(7), and two equivalent O(8) atoms. In the fourth La site, La(4) is bonded to one O(6), two equivalent O(7), and two equivalent O(8) atoms to form distorted LaO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent La(4)O5 trigonal bipyramids, and edges with two equivalent La(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 80°. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent La(1)O5 trigonal bipyramids and corners with two equivalent La(4)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the fifth O site, O(5) is bonded to two equivalent La(1), two equivalent La(2), and one Mn(1) atom to form distorted OLa4Mn square pyramids that share  a cornercorner with one O(8)La4Mn square pyramid, corners with four equivalent O(5)La4Mn square pyramids, corners with two equivalent O(7)La5 trigonal bipyramids, and edges with four equivalent O(6)La5 trigonal bipyramids. In the sixth O site, O(6) is bonded to one La(4), two equivalent La(1), and two equivalent La(2) atoms to form OLa5 trigonal bipyramids that share corners with two equivalent O(8)La4Mn square pyramids, corners with four equivalent O(6)La5 trigonal bipyramids, edges with four equivalent O(5)La4Mn square pyramids, and edges with two equivalent O(7)La5 trigonal bipyramids. In the seventh O site, O(7) is bonded to one La(1), two equivalent La(3), and two equivalent La(4) atoms to form OLa5 trigonal bipyramids that share corners with two equivalent O(5)La4Mn square pyramids, corners with four equivalent O(7)La5 trigonal bipyramids, edges with four equivalent O(8)La4Mn square pyramids, and edges with two equivalent O(6)La5 trigonal bipyramids. In the eighth O site, O(8) is bonded to two equivalent La(3), two equivalent La(4), and one Mn(1) atom to form distorted OLa4Mn square pyramids that share  a cornercorner with one O(5)La4Mn square pyramid, corners with four equivalent O(8)La4Mn square pyramids, corners with two equivalent O(6)La5 trigonal bipyramids, and edges with four equivalent O(7)La5 trigonal bipyramids. is represented by the CIF card [CIF]
data_La4MgMnO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.279
_cell_length_b   8.675
_cell_length_c   5.195
_cell_angle_alpha   89.959
_cell_angle_beta   89.997
_cell_angle_gamma   107.716
_symmetry_Int_Tables_number   1
_cell_volume   226.620
_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  0.181  0.361  0.499  1.0
  La  La1  1  0.606  0.213  1.000  1.0
  La  La2  1  0.394  0.788  1.000  1.0
  La  La3  1  0.819  0.639  0.499  1.0
  Mg  Mg4  1  1.000  1.000  0.500  1.0
  Mn  Mn5  1  0.000  0.000  0.000  1.0
  O  O6  1  0.261  0.000  0.243  1.0
  O  O7  1  0.261  0.001  0.757  1.0
  O  O8  1  0.739  0.999  0.243  1.0
  O  O9  1  0.740  0.000  0.757  1.0
  O  O10  1  0.154  0.307  0.001  1.0
  O  O11  1  0.686  0.371  0.500  1.0
  O  O12  1  0.314  0.629  0.500  1.0
  O  O13  1  0.846  0.692  0.000  1.0
[/CIF]
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The compound described by MgLa4MnO8 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent La sites. In the first La site, La(1) is bonded to one O(7), two equivalent O(5), and two equivalent O(6) atoms to form distorted LaO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent La(1)O5 trigonal bipyramids, and edges with two equivalent La(4)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 80-81°. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms. In the third La site, La(3) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), two equivalent O(7), and two equivalent O(8) atoms. In the fourth La site, La(4) is bonded to one O(6), two equivalent O(7), and two equivalent O(8) atoms to form distorted LaO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent La(4)O5 trigonal bipyramids, and edges with two equivalent La(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 80°. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent La(1)O5 trigonal bipyramids and corners with two equivalent La(4)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one La(3), and one Mn(1) atom. In the fifth O site, O(5) is bonded to two equivalent La(1), two equivalent La(2), and one Mn(1) atom to form distorted OLa4Mn square pyramids that share  a cornercorner with one O(8)La4Mn square pyramid, corners with four equivalent O(5)La4Mn square pyramids, corners with two equivalent O(7)La5 trigonal bipyramids, and edges with four equivalent O(6)La5 trigonal bipyramids. In the sixth O site, O(6) is bonded to one La(4), two equivalent La(1), and two equivalent La(2) atoms to form OLa5 trigonal bipyramids that share corners with two equivalent O(8)La4Mn square pyramids, corners with four equivalent O(6)La5 trigonal bipyramids, edges with four equivalent O(5)La4Mn square pyramids, and edges with two equivalent O(7)La5 trigonal bipyramids. In the seventh O site, O(7) is bonded to one La(1), two equivalent La(3), and two equivalent La(4) atoms to form OLa5 trigonal bipyramids that share corners with two equivalent O(5)La4Mn square pyramids, corners with four equivalent O(7)La5 trigonal bipyramids, edges with four equivalent O(8)La4Mn square pyramids, and edges with two equivalent O(6)La5 trigonal bipyramids. In the eighth O site, O(8) is bonded to two equivalent La(3), two equivalent La(4), and one Mn(1) atom to form distorted OLa4Mn square pyramids that share  a cornercorner with one O(5)La4Mn square pyramid, corners with four equivalent O(8)La4Mn square pyramids, corners with two equivalent O(6)La5 trigonal bipyramids, and edges with four equivalent O(7)La5 trigonal bipyramids. is represented by the CIF card [CIF]
data_La4MgMnO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.279
_cell_length_b   8.675
_cell_length_c   5.195
_cell_angle_alpha   89.959
_cell_angle_beta   89.997
_cell_angle_gamma   107.716
_symmetry_Int_Tables_number   1
_cell_volume   226.620
_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  0.181  0.361  0.499  1.0
  La  La1  1  0.606  0.213  1.000  1.0
  La  La2  1  0.394  0.788  1.000  1.0
  La  La3  1  0.819  0.639  0.499  1.0
  Mg  Mg4  1  1.000  1.000  0.500  1.0
  Mn  Mn5  1  0.000  0.000  0.000  1.0
  O  O6  1  0.261  0.000  0.243  1.0
  O  O7  1  0.261  0.001  0.757  1.0
  O  O8  1  0.739  0.999  0.243  1.0
  O  O9  1  0.740  0.000  0.757  1.0
  O  O10  1  0.154  0.307  0.001  1.0
  O  O11  1  0.686  0.371  0.500  1.0
  O  O12  1  0.314  0.629  0.500  1.0
  O  O13  1  0.846  0.692  0.000  1.0
[/CIF]
.