The material described by Sr8MgMn6O20 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(11), one O(12), one O(15), one O(18), one O(7), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to one O(1), one O(11), one O(12), one O(13), one O(16), one O(4), one O(7), one O(8), and two equivalent O(19) atoms. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one O(10), one O(14), one O(18), one O(2), and one O(20) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(17), one O(19), one O(4), one O(6), one O(9), and two equivalent O(13) atoms. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one O(1), one O(13), one O(16), one O(4), one O(5), one O(6), one O(9), and two equivalent O(17) atoms. In the sixth Sr site, Sr(6) is bonded in a 6-coordinate geometry to one O(14), one O(2), one O(20), one O(5), one O(6), and one O(9) atom. In the seventh Sr site, Sr(7) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(18), one O(2), one O(3), one O(7), one O(8), and two equivalent O(15) atoms. In the eighth Sr site, Sr(8) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(19), one O(4), one O(7), and two equivalent O(16) atoms. Mg(1) is bonded to one O(15), one O(2), one O(20), and one O(3) atom to form distorted MgO4 trigonal pyramids that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Mn(6)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-57°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(13), one O(17), one O(4), one O(6), and one O(9) atom to form a mixture of corner and face-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 15-17°. In the second Mn site, Mn(2) is bonded to one O(10), one O(14), one O(2), one O(20), one O(3), and one O(5) atom to form distorted MnO6 octahedra that share  a cornercorner with one Mg(1)O4 trigonal pyramid,  an edgeedge with one Mg(1)O4 trigonal pyramid, and  a faceface with one Mn(5)O6 octahedra. In the third Mn site, Mn(3) is bonded in a 5-coordinate geometry to one O(11), one O(15), one O(18), one O(3), and one O(8) atom. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(12), one O(16), one O(19), one O(4), and one O(7) atom to form a mixture of distorted corner and face-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 15-17°. In the fifth Mn site, Mn(5) is bonded to one O(10), one O(17), one O(20), one O(5), one O(6), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Mg(1)O4 trigonal pyramid,  a faceface with one Mn(1)O6 octahedra, and  a faceface with one Mn(2)O6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(12), one O(15), one O(16), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Mg(1)O4 trigonal pyramid and  a faceface with one Mn(4)O6 octahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), one Sr(5), one Sr(8), one Mn(1), and one Mn(4) atom. In the second O site, O(2) is bonded to one Sr(3), one Sr(6), one Sr(7), one Mg(1), and one Mn(2) atom to form distorted OSr3MgMn trigonal bipyramids that share  a cornercorner with one O(6)Sr3Mn2 square pyramid and corners with two equivalent O(18)Sr3Mn tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(7), one Mg(1), one Mn(2), and one Mn(3) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), one Sr(5), one Sr(8), one Mn(1), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(5), one Sr(6), one Mn(2), and one Mn(5) atom. In the sixth O site, O(6) is bonded to one Sr(4), one Sr(5), one Sr(6), one Mn(1), and one Mn(5) atom to form distorted corner-sharing OSr3Mn2 square pyramids. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Sr(8), one Mn(4), and one Mn(6) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Mn(3), and one Mn(6) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Sr(4), one Sr(5), one Sr(6), one Mn(1), and one Mn(5) atom. In the tenth O site, O(10) is bonded in a distorted T-shaped geometry to one Sr(3), one Mn(2), and one Mn(5) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Sr(8), one Mn(3), and one Mn(6) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Sr(8), one Mn(4), and one Mn(6) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(5), two equivalent Sr(4), and one Mn(1) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(6), and one Mn(2) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Sr(1), two equivalent Sr(7), one Mg(1), one Mn(3), and one Mn(6) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(5), two equivalent Sr(8), one Mn(4), and one Mn(6) atom. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Sr(4), two equivalent Sr(5), one Mn(1), and one Mn(5) atom. In the eighteenth O site, O(18) is bonded to one Sr(1), one Sr(3), one Sr(7), and one Mn(3) atom to form distorted corner-sharing OSr3Mn tetrahedra. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Sr(4), one Sr(8), two equivalent Sr(2), and one Mn(4) atom. In the twentieth O site, O(20) is bonded in a 5-coordinate geometry to one Sr(3), one Sr(6), one Mg(1), one Mn(2), and one Mn(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr8MgMn6O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.686
_cell_length_b   6.673
_cell_length_c   14.220
_cell_angle_alpha   94.353
_cell_angle_beta   83.897
_cell_angle_gamma   112.862
_symmetry_Int_Tables_number   1
_cell_volume   494.023
_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
  Sr  Sr0  1  0.156  0.462  0.076  1.0
  Sr  Sr1  1  0.765  0.502  0.865  1.0
  Sr  Sr2  1  0.787  0.525  0.338  1.0
  Sr  Sr3  1  0.297  0.491  0.658  1.0
  Sr  Sr4  1  0.022  0.907  0.644  1.0
  Sr  Sr5  1  0.200  0.194  0.425  1.0
  Sr  Sr6  1  0.438  0.058  0.126  1.0
  Sr  Sr7  1  0.478  0.926  0.868  1.0
  Mg  Mg8  1  0.871  0.026  0.263  1.0
  Mn  Mn9  1  0.670  0.222  0.661  1.0
  Mn  Mn10  1  0.361  0.782  0.345  1.0
  Mn  Mn11  1  0.744  0.691  0.123  1.0
  Mn  Mn12  1  0.134  0.230  0.845  1.0
  Mn  Mn13  1  0.557  0.990  0.502  1.0
  Mn  Mn14  1  0.963  0.990  0.995  1.0
  O  O15  1  0.395  0.186  0.757  1.0
  O  O16  1  0.130  0.899  0.288  1.0
  O  O17  1  0.554  0.785  0.225  1.0
  O  O18  1  0.875  0.178  0.747  1.0
  O  O19  1  0.211  0.838  0.467  1.0
  O  O20  1  0.453  0.225  0.558  1.0
  O  O21  1  0.317  0.184  0.974  1.0
  O  O22  1  0.030  0.743  0.030  1.0
  O  O23  1  0.889  0.172  0.552  1.0
  O  O24  1  0.602  0.752  0.430  1.0
  O  O25  1  0.599  0.790  0.023  1.0
  O  O26  1  0.871  0.219  0.955  1.0
  O  O27  1  0.824  0.525  0.681  1.0
  O  O28  1  0.187  0.482  0.331  1.0
  O  O29  1  0.978  0.084  0.129  1.0
  O  O30  1  0.972  0.906  0.863  1.0
  O  O31  1  0.491  0.887  0.628  1.0
  O  O32  1  0.734  0.434  0.169  1.0
  O  O33  1  0.278  0.535  0.836  1.0
  O  O34  1  0.632  0.107  0.368  1.0
[/CIF]
.
The material described by Sr8MgMn6O20 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(11), one O(12), one O(15), one O(18), one O(7), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to one O(1), one O(11), one O(12), one O(13), one O(16), one O(4), one O(7), one O(8), and two equivalent O(19) atoms. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one O(10), one O(14), one O(18), one O(2), and one O(20) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(17), one O(19), one O(4), one O(6), one O(9), and two equivalent O(13) atoms. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one O(1), one O(13), one O(16), one O(4), one O(5), one O(6), one O(9), and two equivalent O(17) atoms. In the sixth Sr site, Sr(6) is bonded in a 6-coordinate geometry to one O(14), one O(2), one O(20), one O(5), one O(6), and one O(9) atom. In the seventh Sr site, Sr(7) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(18), one O(2), one O(3), one O(7), one O(8), and two equivalent O(15) atoms. In the eighth Sr site, Sr(8) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(19), one O(4), one O(7), and two equivalent O(16) atoms. Mg(1) is bonded to one O(15), one O(2), one O(20), and one O(3) atom to form distorted MgO4 trigonal pyramids that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Mn(6)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-57°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(13), one O(17), one O(4), one O(6), and one O(9) atom to form a mixture of corner and face-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 15-17°. In the second Mn site, Mn(2) is bonded to one O(10), one O(14), one O(2), one O(20), one O(3), and one O(5) atom to form distorted MnO6 octahedra that share  a cornercorner with one Mg(1)O4 trigonal pyramid,  an edgeedge with one Mg(1)O4 trigonal pyramid, and  a faceface with one Mn(5)O6 octahedra. In the third Mn site, Mn(3) is bonded in a 5-coordinate geometry to one O(11), one O(15), one O(18), one O(3), and one O(8) atom. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(12), one O(16), one O(19), one O(4), and one O(7) atom to form a mixture of distorted corner and face-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 15-17°. In the fifth Mn site, Mn(5) is bonded to one O(10), one O(17), one O(20), one O(5), one O(6), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Mg(1)O4 trigonal pyramid,  a faceface with one Mn(1)O6 octahedra, and  a faceface with one Mn(2)O6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(12), one O(15), one O(16), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Mg(1)O4 trigonal pyramid and  a faceface with one Mn(4)O6 octahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), one Sr(5), one Sr(8), one Mn(1), and one Mn(4) atom. In the second O site, O(2) is bonded to one Sr(3), one Sr(6), one Sr(7), one Mg(1), and one Mn(2) atom to form distorted OSr3MgMn trigonal bipyramids that share  a cornercorner with one O(6)Sr3Mn2 square pyramid and corners with two equivalent O(18)Sr3Mn tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(7), one Mg(1), one Mn(2), and one Mn(3) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), one Sr(5), one Sr(8), one Mn(1), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(5), one Sr(6), one Mn(2), and one Mn(5) atom. In the sixth O site, O(6) is bonded to one Sr(4), one Sr(5), one Sr(6), one Mn(1), and one Mn(5) atom to form distorted corner-sharing OSr3Mn2 square pyramids. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Sr(8), one Mn(4), and one Mn(6) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Mn(3), and one Mn(6) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Sr(4), one Sr(5), one Sr(6), one Mn(1), and one Mn(5) atom. In the tenth O site, O(10) is bonded in a distorted T-shaped geometry to one Sr(3), one Mn(2), and one Mn(5) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Sr(8), one Mn(3), and one Mn(6) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(7), one Sr(8), one Mn(4), and one Mn(6) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(5), two equivalent Sr(4), and one Mn(1) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(6), and one Mn(2) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Sr(1), two equivalent Sr(7), one Mg(1), one Mn(3), and one Mn(6) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(5), two equivalent Sr(8), one Mn(4), and one Mn(6) atom. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Sr(4), two equivalent Sr(5), one Mn(1), and one Mn(5) atom. In the eighteenth O site, O(18) is bonded to one Sr(1), one Sr(3), one Sr(7), and one Mn(3) atom to form distorted corner-sharing OSr3Mn tetrahedra. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Sr(4), one Sr(8), two equivalent Sr(2), and one Mn(4) atom. In the twentieth O site, O(20) is bonded in a 5-coordinate geometry to one Sr(3), one Sr(6), one Mg(1), one Mn(2), and one Mn(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr8MgMn6O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.686
_cell_length_b   6.673
_cell_length_c   14.220
_cell_angle_alpha   94.353
_cell_angle_beta   83.897
_cell_angle_gamma   112.862
_symmetry_Int_Tables_number   1
_cell_volume   494.023
_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
  Sr  Sr0  1  0.156  0.462  0.076  1.0
  Sr  Sr1  1  0.765  0.502  0.865  1.0
  Sr  Sr2  1  0.787  0.525  0.338  1.0
  Sr  Sr3  1  0.297  0.491  0.658  1.0
  Sr  Sr4  1  0.022  0.907  0.644  1.0
  Sr  Sr5  1  0.200  0.194  0.425  1.0
  Sr  Sr6  1  0.438  0.058  0.126  1.0
  Sr  Sr7  1  0.478  0.926  0.868  1.0
  Mg  Mg8  1  0.871  0.026  0.263  1.0
  Mn  Mn9  1  0.670  0.222  0.661  1.0
  Mn  Mn10  1  0.361  0.782  0.345  1.0
  Mn  Mn11  1  0.744  0.691  0.123  1.0
  Mn  Mn12  1  0.134  0.230  0.845  1.0
  Mn  Mn13  1  0.557  0.990  0.502  1.0
  Mn  Mn14  1  0.963  0.990  0.995  1.0
  O  O15  1  0.395  0.186  0.757  1.0
  O  O16  1  0.130  0.899  0.288  1.0
  O  O17  1  0.554  0.785  0.225  1.0
  O  O18  1  0.875  0.178  0.747  1.0
  O  O19  1  0.211  0.838  0.467  1.0
  O  O20  1  0.453  0.225  0.558  1.0
  O  O21  1  0.317  0.184  0.974  1.0
  O  O22  1  0.030  0.743  0.030  1.0
  O  O23  1  0.889  0.172  0.552  1.0
  O  O24  1  0.602  0.752  0.430  1.0
  O  O25  1  0.599  0.790  0.023  1.0
  O  O26  1  0.871  0.219  0.955  1.0
  O  O27  1  0.824  0.525  0.681  1.0
  O  O28  1  0.187  0.482  0.331  1.0
  O  O29  1  0.978  0.084  0.129  1.0
  O  O30  1  0.972  0.906  0.863  1.0
  O  O31  1  0.491  0.887  0.628  1.0
  O  O32  1  0.734  0.434  0.169  1.0
  O  O33  1  0.278  0.535  0.836  1.0
  O  O34  1  0.632  0.107  0.368  1.0
[/CIF]
.