The structure described by Sr8MgMn6O20 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic Cm space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(12), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(7), two equivalent O(1), and two equivalent O(13) atoms. In the third Sr site, Sr(3) is bonded in a 10-coordinate geometry to one O(12), one O(14), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(8) atoms. In the fourth Sr site, Sr(4) is bonded in a 10-coordinate geometry to one O(11), one O(13), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms. In the fifth Sr site, Sr(5) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(1), two equivalent O(11), two equivalent O(3), and two equivalent O(4) atoms. In the sixth Sr site, Sr(6) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(14), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the seventh Sr site, Sr(7) is bonded in a 8-coordinate geometry to one O(12), one O(14), two equivalent O(2), two equivalent O(6), and two equivalent O(9) atoms. In the eighth Sr site, Sr(8) is bonded in a 8-coordinate geometry to one O(11), one O(13), two equivalent O(1), two equivalent O(10), and two equivalent O(5) atoms. Mg(1) is bonded in a 5-coordinate geometry to one O(12), two equivalent O(5), and two equivalent O(6) atoms. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(7), two equivalent O(1), and two equivalent O(4) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 12°. In the second Mn site, Mn(2) is bonded to one O(14), one O(8), two equivalent O(2), and two equivalent O(3) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 13°. In the third Mn site, Mn(3) is bonded to one O(12), one O(9), two equivalent O(2), and two equivalent O(6) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 13°. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(13), two equivalent O(1), and two equivalent O(5) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 12°. In the fifth Mn site, Mn(5) is bonded to one O(11), one O(14), two equivalent O(3), and two equivalent O(4) atoms to form face-sharing MnO6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(9), two equivalent O(5), and two equivalent O(6) atoms to form distorted face-sharing MnO6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-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 in a 2-coordinate geometry to one Sr(1), one Sr(3), one Sr(6), one Sr(7), one Mn(2), and one Mn(3) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(4), one Sr(5), one Sr(6), one Mn(2), and one Mn(5) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(4), one Sr(5), one Sr(6), one Mn(1), and one Mn(5) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(8), one Mg(1), one Mn(4), and one Mn(6) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(7), one Mg(1), one Mn(3), and one Mn(6) atom. In the seventh O site, O(7) 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 eighth O site, O(8) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(6), two equivalent Sr(3), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(6), two equivalent Sr(7), one Mn(3), and one Mn(6) atom. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(5), two equivalent Sr(8), one Mn(4), and one Mn(6) atom. In the eleventh O site, O(11) is bonded in a 6-coordinate geometry to one Sr(4), one Sr(8), two equivalent Sr(5), one Mn(1), and one Mn(5) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(7), two equivalent Sr(1), one Mg(1), and one Mn(3) atom. In the thirteenth O site, O(13) 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 fourteenth O site, O(14) is bonded to one Sr(3), one Sr(7), two equivalent Sr(6), one Mn(2), and one Mn(5) atom to form distorted corner-sharing OSr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 5°. is represented by the CIF file [CIF]
data_Sr8MgMn6O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.587
_cell_length_b   6.775
_cell_length_c   13.598
_cell_angle_alpha   90.602
_cell_angle_beta   89.995
_cell_angle_gamma   114.348
_symmetry_Int_Tables_number   1
_cell_volume   468.937
_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  0.229  0.459  0.143  1.0
  Sr  Sr1  1  0.776  0.552  0.822  1.0
  Sr  Sr2  1  0.735  0.469  0.388  1.0
  Sr  Sr3  1  0.263  0.526  0.612  1.0
  Sr  Sr4  1  0.979  0.958  0.634  1.0
  Sr  Sr5  1  0.027  0.053  0.366  1.0
  Sr  Sr6  1  0.510  0.019  0.153  1.0
  Sr  Sr7  1  0.486  0.971  0.858  1.0
  Mg  Mg8  1  0.720  0.440  0.025  1.0
  Mn  Mn9  1  0.627  0.254  0.646  1.0
  Mn  Mn10  1  0.367  0.733  0.351  1.0
  Mn  Mn11  1  0.868  0.736  0.162  1.0
  Mn  Mn12  1  0.140  0.281  0.847  1.0
  Mn  Mn13  1  0.499  0.997  0.497  1.0
  Mn  Mn14  1  0.001  0.002  0.003  1.0
  O  O15  1  0.373  0.234  0.742  1.0
  O  O16  1  0.133  0.769  0.257  1.0
  O  O17  1  0.636  0.769  0.257  1.0
  O  O18  1  0.861  0.234  0.742  1.0
  O  O19  1  0.159  0.772  0.460  1.0
  O  O20  1  0.376  0.215  0.532  1.0
  O  O21  1  0.374  0.247  0.967  1.0
  O  O22  1  0.089  0.728  0.054  1.0
  O  O23  1  0.840  0.215  0.532  1.0
  O  O24  1  0.613  0.772  0.460  1.0
  O  O25  1  0.639  0.728  0.054  1.0
  O  O26  1  0.873  0.247  0.967  1.0
  O  O27  1  0.781  0.561  0.647  1.0
  O  O28  1  0.218  0.437  0.340  1.0
  O  O29  1  0.028  0.056  0.144  1.0
  O  O30  1  0.973  0.945  0.863  1.0
  O  O31  1  0.464  0.928  0.634  1.0
  O  O32  1  0.712  0.423  0.170  1.0
  O  O33  1  0.290  0.580  0.825  1.0
  O  O34  1  0.534  0.068  0.360  1.0
[/CIF]
.
The structure described by Sr8MgMn6O20 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic Cm space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(12), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(7), two equivalent O(1), and two equivalent O(13) atoms. In the third Sr site, Sr(3) is bonded in a 10-coordinate geometry to one O(12), one O(14), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(8) atoms. In the fourth Sr site, Sr(4) is bonded in a 10-coordinate geometry to one O(11), one O(13), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms. In the fifth Sr site, Sr(5) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(1), two equivalent O(11), two equivalent O(3), and two equivalent O(4) atoms. In the sixth Sr site, Sr(6) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(14), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the seventh Sr site, Sr(7) is bonded in a 8-coordinate geometry to one O(12), one O(14), two equivalent O(2), two equivalent O(6), and two equivalent O(9) atoms. In the eighth Sr site, Sr(8) is bonded in a 8-coordinate geometry to one O(11), one O(13), two equivalent O(1), two equivalent O(10), and two equivalent O(5) atoms. Mg(1) is bonded in a 5-coordinate geometry to one O(12), two equivalent O(5), and two equivalent O(6) atoms. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(7), two equivalent O(1), and two equivalent O(4) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 12°. In the second Mn site, Mn(2) is bonded to one O(14), one O(8), two equivalent O(2), and two equivalent O(3) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 13°. In the third Mn site, Mn(3) is bonded to one O(12), one O(9), two equivalent O(2), and two equivalent O(6) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 13°. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(13), two equivalent O(1), and two equivalent O(5) atoms to form a mixture of face and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 12°. In the fifth Mn site, Mn(5) is bonded to one O(11), one O(14), two equivalent O(3), and two equivalent O(4) atoms to form face-sharing MnO6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(9), two equivalent O(5), and two equivalent O(6) atoms to form distorted face-sharing MnO6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-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 in a 2-coordinate geometry to one Sr(1), one Sr(3), one Sr(6), one Sr(7), one Mn(2), and one Mn(3) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(4), one Sr(5), one Sr(6), one Mn(2), and one Mn(5) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(4), one Sr(5), one Sr(6), one Mn(1), and one Mn(5) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(8), one Mg(1), one Mn(4), and one Mn(6) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(7), one Mg(1), one Mn(3), and one Mn(6) atom. In the seventh O site, O(7) 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 eighth O site, O(8) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(6), two equivalent Sr(3), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(6), two equivalent Sr(7), one Mn(3), and one Mn(6) atom. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(5), two equivalent Sr(8), one Mn(4), and one Mn(6) atom. In the eleventh O site, O(11) is bonded in a 6-coordinate geometry to one Sr(4), one Sr(8), two equivalent Sr(5), one Mn(1), and one Mn(5) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(7), two equivalent Sr(1), one Mg(1), and one Mn(3) atom. In the thirteenth O site, O(13) 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 fourteenth O site, O(14) is bonded to one Sr(3), one Sr(7), two equivalent Sr(6), one Mn(2), and one Mn(5) atom to form distorted corner-sharing OSr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 5°. is represented by the CIF file [CIF]
data_Sr8MgMn6O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.587
_cell_length_b   6.775
_cell_length_c   13.598
_cell_angle_alpha   90.602
_cell_angle_beta   89.995
_cell_angle_gamma   114.348
_symmetry_Int_Tables_number   1
_cell_volume   468.937
_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  0.229  0.459  0.143  1.0
  Sr  Sr1  1  0.776  0.552  0.822  1.0
  Sr  Sr2  1  0.735  0.469  0.388  1.0
  Sr  Sr3  1  0.263  0.526  0.612  1.0
  Sr  Sr4  1  0.979  0.958  0.634  1.0
  Sr  Sr5  1  0.027  0.053  0.366  1.0
  Sr  Sr6  1  0.510  0.019  0.153  1.0
  Sr  Sr7  1  0.486  0.971  0.858  1.0
  Mg  Mg8  1  0.720  0.440  0.025  1.0
  Mn  Mn9  1  0.627  0.254  0.646  1.0
  Mn  Mn10  1  0.367  0.733  0.351  1.0
  Mn  Mn11  1  0.868  0.736  0.162  1.0
  Mn  Mn12  1  0.140  0.281  0.847  1.0
  Mn  Mn13  1  0.499  0.997  0.497  1.0
  Mn  Mn14  1  0.001  0.002  0.003  1.0
  O  O15  1  0.373  0.234  0.742  1.0
  O  O16  1  0.133  0.769  0.257  1.0
  O  O17  1  0.636  0.769  0.257  1.0
  O  O18  1  0.861  0.234  0.742  1.0
  O  O19  1  0.159  0.772  0.460  1.0
  O  O20  1  0.376  0.215  0.532  1.0
  O  O21  1  0.374  0.247  0.967  1.0
  O  O22  1  0.089  0.728  0.054  1.0
  O  O23  1  0.840  0.215  0.532  1.0
  O  O24  1  0.613  0.772  0.460  1.0
  O  O25  1  0.639  0.728  0.054  1.0
  O  O26  1  0.873  0.247  0.967  1.0
  O  O27  1  0.781  0.561  0.647  1.0
  O  O28  1  0.218  0.437  0.340  1.0
  O  O29  1  0.028  0.056  0.144  1.0
  O  O30  1  0.973  0.945  0.863  1.0
  O  O31  1  0.464  0.928  0.634  1.0
  O  O32  1  0.712  0.423  0.170  1.0
  O  O33  1  0.290  0.580  0.825  1.0
  O  O34  1  0.534  0.068  0.360  1.0
[/CIF]
.