The material structure described by LaMn8Bi3O20 crystallizes in the monoclinic Pm space group. La(1) is bonded in a 8-coordinate geometry to one O(10), one O(7), two equivalent O(11), two equivalent O(13), and two equivalent O(5) atoms. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), two equivalent O(11), and two equivalent O(6) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-56°. In the second Mn site, Mn(2) is bonded to one O(2), two equivalent O(12), and two equivalent O(6) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-57°. In the third Mn site, Mn(3) is bonded to one O(3), two equivalent O(13), and two equivalent O(5) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(4)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-57°. In the fourth Mn site, Mn(4) is bonded to one O(4), two equivalent O(14), and two equivalent O(5) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-57°. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(13), one O(14), one O(2), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one Mn(3)O5 square pyramid,  a cornercorner with one Mn(4)O5 square pyramid, and edges with two equivalent Mn(5)O6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(11), one O(12), one O(3), one O(4), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one Mn(3)O5 square pyramid,  a cornercorner with one Mn(4)O5 square pyramid, and edges with two equivalent Mn(6)O6 octahedra. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to one O(8), one O(9), two equivalent O(12), two equivalent O(14), and two equivalent O(5) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one O(8), one O(9), two equivalent O(11), two equivalent O(13), and two equivalent O(6) atoms. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to one O(10), one O(7), two equivalent O(12), two equivalent O(14), and two equivalent O(6) atoms. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Mn(5) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(5) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(3) and two equivalent Mn(6) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(4) and two equivalent Mn(6) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one La(1), one Mn(3), one Mn(4), and one Bi(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(2), one Bi(2), and one Bi(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one La(1), two equivalent Mn(5), and one Bi(3) atom. In the eighth O site, O(8) is bonded in a distorted tetrahedral geometry to two equivalent Mn(5), one Bi(1), and one Bi(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Mn(6), one Bi(1), and one Bi(2) atom. In the tenth O site, O(10) is bonded in a distorted tetrahedral geometry to one La(1), two equivalent Mn(6), and one Bi(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one La(1), one Mn(1), one Mn(6), and one Bi(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mn(2), one Mn(6), one Bi(1), and one Bi(3) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one La(1), one Mn(3), one Mn(5), and one Bi(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Mn(4), one Mn(5), one Bi(1), and one Bi(3) atom. is represented by the CIF card [CIF]
data_LaMn8Bi3O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.866
_cell_length_b   7.669
_cell_length_c   8.678
_cell_angle_alpha   89.918
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   390.406
_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  0.000  0.357  0.668  1.0
  Mn  Mn1  1  0.500  0.091  0.848  1.0
  Mn  Mn2  1  0.500  0.906  0.150  1.0
  Mn  Mn3  1  0.500  0.597  0.649  1.0
  Mn  Mn4  1  0.500  0.407  0.349  1.0
  Mn  Mn5  1  0.742  0.500  0.001  1.0
  Mn  Mn6  1  0.258  0.999  0.501  1.0
  Mn  Mn7  1  0.258  0.500  0.001  1.0
  Mn  Mn8  1  0.742  0.999  0.501  1.0
  Bi  Bi9  1  0.000  0.660  0.332  1.0
  Bi  Bi10  1  0.000  0.848  0.835  1.0
  Bi  Bi11  1  0.000  0.155  0.167  1.0
  O  O12  1  0.500  0.354  0.927  1.0
  O  O13  1  0.500  0.646  0.072  1.0
  O  O14  1  0.500  0.852  0.571  1.0
  O  O15  1  0.500  0.146  0.428  1.0
  O  O16  1  0.717  0.501  0.500  1.0
  O  O17  1  0.282  1.000  0.001  1.0
  O  O18  1  0.283  0.501  0.500  1.0
  O  O19  1  0.718  1.000  0.001  1.0
  O  O20  1  0.000  0.346  0.947  1.0
  O  O21  1  0.000  0.656  0.056  1.0
  O  O22  1  0.000  0.844  0.556  1.0
  O  O23  1  0.000  0.152  0.442  1.0
  O  O24  1  0.748  0.106  0.702  1.0
  O  O25  1  0.750  0.888  0.298  1.0
  O  O26  1  0.248  0.610  0.797  1.0
  O  O27  1  0.251  0.388  0.202  1.0
  O  O28  1  0.250  0.888  0.298  1.0
  O  O29  1  0.252  0.106  0.702  1.0
  O  O30  1  0.749  0.388  0.202  1.0
  O  O31  1  0.752  0.610  0.797  1.0
[/CIF]
.
The material structure described by LaMn8Bi3O20 crystallizes in the monoclinic Pm space group. La(1) is bonded in a 8-coordinate geometry to one O(10), one O(7), two equivalent O(11), two equivalent O(13), and two equivalent O(5) atoms. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), two equivalent O(11), and two equivalent O(6) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-56°. In the second Mn site, Mn(2) is bonded to one O(2), two equivalent O(12), and two equivalent O(6) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-57°. In the third Mn site, Mn(3) is bonded to one O(3), two equivalent O(13), and two equivalent O(5) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(4)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-57°. In the fourth Mn site, Mn(4) is bonded to one O(4), two equivalent O(14), and two equivalent O(5) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  an edgeedge with one Mn(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-57°. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(13), one O(14), one O(2), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one Mn(3)O5 square pyramid,  a cornercorner with one Mn(4)O5 square pyramid, and edges with two equivalent Mn(5)O6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(11), one O(12), one O(3), one O(4), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one Mn(3)O5 square pyramid,  a cornercorner with one Mn(4)O5 square pyramid, and edges with two equivalent Mn(6)O6 octahedra. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to one O(8), one O(9), two equivalent O(12), two equivalent O(14), and two equivalent O(5) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one O(8), one O(9), two equivalent O(11), two equivalent O(13), and two equivalent O(6) atoms. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to one O(10), one O(7), two equivalent O(12), two equivalent O(14), and two equivalent O(6) atoms. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Mn(5) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(5) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(3) and two equivalent Mn(6) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(4) and two equivalent Mn(6) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one La(1), one Mn(3), one Mn(4), and one Bi(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(2), one Bi(2), and one Bi(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one La(1), two equivalent Mn(5), and one Bi(3) atom. In the eighth O site, O(8) is bonded in a distorted tetrahedral geometry to two equivalent Mn(5), one Bi(1), and one Bi(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Mn(6), one Bi(1), and one Bi(2) atom. In the tenth O site, O(10) is bonded in a distorted tetrahedral geometry to one La(1), two equivalent Mn(6), and one Bi(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one La(1), one Mn(1), one Mn(6), and one Bi(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mn(2), one Mn(6), one Bi(1), and one Bi(3) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one La(1), one Mn(3), one Mn(5), and one Bi(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Mn(4), one Mn(5), one Bi(1), and one Bi(3) atom. is represented by the CIF card [CIF]
data_LaMn8Bi3O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.866
_cell_length_b   7.669
_cell_length_c   8.678
_cell_angle_alpha   89.918
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   390.406
_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  0.000  0.357  0.668  1.0
  Mn  Mn1  1  0.500  0.091  0.848  1.0
  Mn  Mn2  1  0.500  0.906  0.150  1.0
  Mn  Mn3  1  0.500  0.597  0.649  1.0
  Mn  Mn4  1  0.500  0.407  0.349  1.0
  Mn  Mn5  1  0.742  0.500  0.001  1.0
  Mn  Mn6  1  0.258  0.999  0.501  1.0
  Mn  Mn7  1  0.258  0.500  0.001  1.0
  Mn  Mn8  1  0.742  0.999  0.501  1.0
  Bi  Bi9  1  0.000  0.660  0.332  1.0
  Bi  Bi10  1  0.000  0.848  0.835  1.0
  Bi  Bi11  1  0.000  0.155  0.167  1.0
  O  O12  1  0.500  0.354  0.927  1.0
  O  O13  1  0.500  0.646  0.072  1.0
  O  O14  1  0.500  0.852  0.571  1.0
  O  O15  1  0.500  0.146  0.428  1.0
  O  O16  1  0.717  0.501  0.500  1.0
  O  O17  1  0.282  1.000  0.001  1.0
  O  O18  1  0.283  0.501  0.500  1.0
  O  O19  1  0.718  1.000  0.001  1.0
  O  O20  1  0.000  0.346  0.947  1.0
  O  O21  1  0.000  0.656  0.056  1.0
  O  O22  1  0.000  0.844  0.556  1.0
  O  O23  1  0.000  0.152  0.442  1.0
  O  O24  1  0.748  0.106  0.702  1.0
  O  O25  1  0.750  0.888  0.298  1.0
  O  O26  1  0.248  0.610  0.797  1.0
  O  O27  1  0.251  0.388  0.202  1.0
  O  O28  1  0.250  0.888  0.298  1.0
  O  O29  1  0.252  0.106  0.702  1.0
  O  O30  1  0.749  0.388  0.202  1.0
  O  O31  1  0.752  0.610  0.797  1.0
[/CIF]
.