The material structure described by Mg11Mn2O13 is Caswellsilverite-like structured and crystallizes in the orthorhombic Immm space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third Mg site, Mg(3) is bonded to two equivalent O(4) and four equivalent O(5) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Mg(4)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with five equivalent Mg(4)O6 octahedra, and edges with six equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourth Mg site, Mg(4) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Mg(4)O6 octahedra, corners with two equivalent Mg(6)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with four equivalent Mn(1)O6 octahedra, and edges with five equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the fifth Mg site, Mg(5) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. In the sixth Mg site, Mg(6) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra, corners with two equivalent Mg(5)O6 octahedra, corners with two equivalent Mg(6)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra, edges with two equivalent Mg(6)O6 octahedra, edges with four equivalent Mg(2)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. Mn(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms to form MnO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, and edges with four equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are seven inequivalent O sites. In the first O site, O(5) is bonded to two equivalent Mg(4) and four equivalent Mg(3) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Mg4Mn2 octahedra, corners with two equivalent O(7)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra,  an edgeedge with one O(7)Mg4Mn2 octahedra, edges with five equivalent O(4)Mg4Mn2 octahedra, and edges with six equivalent O(5)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the second O site, O(6) is bonded to two equivalent Mg(2), two equivalent Mg(5), and two equivalent Mg(6) atoms to form OMg6 octahedra that share corners with two equivalent O(7)Mg4Mn2 octahedra, corners with two equivalent O(1)Mg6 octahedra, corners with two equivalent O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg4Mn2 octahedra,  an edgeedge with one O(1)Mg6 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(2)Mg4Mn2 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the third O site, O(7) is bonded to two equivalent Mg(4), two equivalent Mg(6), and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(7)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra, corners with two equivalent O(6)Mg6 octahedra,  an edgeedge with one O(5)Mg6 octahedra,  an edgeedge with one O(6)Mg6 octahedra, edges with two equivalent O(7)Mg4Mn2 octahedra, edges with four equivalent O(2)Mg4Mn2 octahedra, and edges with four equivalent O(4)Mg4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the fourth O site, O(1) is bonded to two equivalent Mg(1) and four equivalent Mg(5) atoms to form a mixture of corner and edge-sharing OMg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(2) is bonded to two equivalent Mg(2), two equivalent Mg(6), and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(2)Mg4Mn2 octahedra, corners with two equivalent O(4)Mg4Mn2 octahedra, corners with two equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)Mg4Mn2 octahedra,  an edgeedge with one O(3)Mg6 octahedra, edges with two equivalent O(2)Mg4Mn2 octahedra, edges with four equivalent O(7)Mg4Mn2 octahedra, and edges with four equivalent O(6)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the sixth O site, O(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), and two equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(2)Mg4Mn2 octahedra, corners with four equivalent O(3)Mg6 octahedra,  an edgeedge with one O(2)Mg4Mn2 octahedra, edges with three equivalent O(3)Mg6 octahedra, edges with four equivalent O(1)Mg6 octahedra, and edges with four equivalent O(6)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the seventh O site, O(4) is bonded to two equivalent Mg(3), two equivalent Mg(4), and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(2)Mg4Mn2 octahedra, corners with two equivalent O(4)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra,  an edgeedge with one O(2)Mg4Mn2 octahedra, edges with two equivalent O(4)Mg4Mn2 octahedra, edges with four equivalent O(7)Mg4Mn2 octahedra, and edges with five equivalent O(5)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg11Mn2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.039
_cell_length_b   4.302
_cell_length_c   19.973
_cell_angle_alpha   96.183
_cell_angle_beta   94.363
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   258.806
_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
  Mg  Mg0  1  0.846  0.846  0.692  1.0
  Mg  Mg1  1  0.922  0.922  0.844  1.0
  Mg  Mg2  1  0.770  0.770  0.541  1.0
  Mg  Mg3  1  0.615  0.615  0.229  1.0
  Mg  Mg4  1  0.078  0.078  0.155  1.0
  Mg  Mg5  1  0.539  0.539  0.078  1.0
  Mg  Mg6  1  0.153  0.153  0.306  1.0
  Mg  Mg7  1  0.384  0.384  0.768  1.0
  Mg  Mg8  1  0.308  0.308  0.616  1.0
  Mg  Mg9  1  0.460  0.460  0.921  1.0
  Mg  Mg10  1  0.232  0.232  0.464  1.0
  Mn  Mn11  1  0.692  0.692  0.385  1.0
  Mn  Mn12  1  1.000  1.000  1.000  1.0
  O  O13  1  0.846  0.346  0.692  1.0
  O  O14  1  0.459  0.959  0.918  1.0
  O  O15  1  0.233  0.733  0.467  1.0
  O  O16  1  0.308  0.808  0.617  1.0
  O  O17  1  0.384  0.884  0.768  1.0
  O  O18  1  0.151  0.651  0.303  1.0
  O  O19  1  0.541  0.041  0.082  1.0
  O  O20  1  0.077  0.577  0.153  1.0
  O  O21  1  0.616  0.116  0.231  1.0
  O  O22  1  0.770  0.270  0.540  1.0
  O  O23  1  0.923  0.423  0.845  1.0
  O  O24  1  0.692  0.192  0.385  1.0
  O  O25  1  1.000  0.500  1.000  1.0
[/CIF]
.
The material structure described by Mg11Mn2O13 is Caswellsilverite-like structured and crystallizes in the orthorhombic Immm space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third Mg site, Mg(3) is bonded to two equivalent O(4) and four equivalent O(5) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Mg(4)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with five equivalent Mg(4)O6 octahedra, and edges with six equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourth Mg site, Mg(4) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Mg(4)O6 octahedra, corners with two equivalent Mg(6)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with four equivalent Mn(1)O6 octahedra, and edges with five equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the fifth Mg site, Mg(5) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. In the sixth Mg site, Mg(6) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra, corners with two equivalent Mg(5)O6 octahedra, corners with two equivalent Mg(6)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra, edges with two equivalent Mg(6)O6 octahedra, edges with four equivalent Mg(2)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. Mn(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms to form MnO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, and edges with four equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are seven inequivalent O sites. In the first O site, O(5) is bonded to two equivalent Mg(4) and four equivalent Mg(3) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Mg4Mn2 octahedra, corners with two equivalent O(7)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra,  an edgeedge with one O(7)Mg4Mn2 octahedra, edges with five equivalent O(4)Mg4Mn2 octahedra, and edges with six equivalent O(5)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the second O site, O(6) is bonded to two equivalent Mg(2), two equivalent Mg(5), and two equivalent Mg(6) atoms to form OMg6 octahedra that share corners with two equivalent O(7)Mg4Mn2 octahedra, corners with two equivalent O(1)Mg6 octahedra, corners with two equivalent O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg4Mn2 octahedra,  an edgeedge with one O(1)Mg6 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(2)Mg4Mn2 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the third O site, O(7) is bonded to two equivalent Mg(4), two equivalent Mg(6), and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(7)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra, corners with two equivalent O(6)Mg6 octahedra,  an edgeedge with one O(5)Mg6 octahedra,  an edgeedge with one O(6)Mg6 octahedra, edges with two equivalent O(7)Mg4Mn2 octahedra, edges with four equivalent O(2)Mg4Mn2 octahedra, and edges with four equivalent O(4)Mg4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the fourth O site, O(1) is bonded to two equivalent Mg(1) and four equivalent Mg(5) atoms to form a mixture of corner and edge-sharing OMg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(2) is bonded to two equivalent Mg(2), two equivalent Mg(6), and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(2)Mg4Mn2 octahedra, corners with two equivalent O(4)Mg4Mn2 octahedra, corners with two equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)Mg4Mn2 octahedra,  an edgeedge with one O(3)Mg6 octahedra, edges with two equivalent O(2)Mg4Mn2 octahedra, edges with four equivalent O(7)Mg4Mn2 octahedra, and edges with four equivalent O(6)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the sixth O site, O(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), and two equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(2)Mg4Mn2 octahedra, corners with four equivalent O(3)Mg6 octahedra,  an edgeedge with one O(2)Mg4Mn2 octahedra, edges with three equivalent O(3)Mg6 octahedra, edges with four equivalent O(1)Mg6 octahedra, and edges with four equivalent O(6)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the seventh O site, O(4) is bonded to two equivalent Mg(3), two equivalent Mg(4), and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(2)Mg4Mn2 octahedra, corners with two equivalent O(4)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra,  an edgeedge with one O(2)Mg4Mn2 octahedra, edges with two equivalent O(4)Mg4Mn2 octahedra, edges with four equivalent O(7)Mg4Mn2 octahedra, and edges with five equivalent O(5)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg11Mn2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.039
_cell_length_b   4.302
_cell_length_c   19.973
_cell_angle_alpha   96.183
_cell_angle_beta   94.363
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   258.806
_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
  Mg  Mg0  1  0.846  0.846  0.692  1.0
  Mg  Mg1  1  0.922  0.922  0.844  1.0
  Mg  Mg2  1  0.770  0.770  0.541  1.0
  Mg  Mg3  1  0.615  0.615  0.229  1.0
  Mg  Mg4  1  0.078  0.078  0.155  1.0
  Mg  Mg5  1  0.539  0.539  0.078  1.0
  Mg  Mg6  1  0.153  0.153  0.306  1.0
  Mg  Mg7  1  0.384  0.384  0.768  1.0
  Mg  Mg8  1  0.308  0.308  0.616  1.0
  Mg  Mg9  1  0.460  0.460  0.921  1.0
  Mg  Mg10  1  0.232  0.232  0.464  1.0
  Mn  Mn11  1  0.692  0.692  0.385  1.0
  Mn  Mn12  1  1.000  1.000  1.000  1.0
  O  O13  1  0.846  0.346  0.692  1.0
  O  O14  1  0.459  0.959  0.918  1.0
  O  O15  1  0.233  0.733  0.467  1.0
  O  O16  1  0.308  0.808  0.617  1.0
  O  O17  1  0.384  0.884  0.768  1.0
  O  O18  1  0.151  0.651  0.303  1.0
  O  O19  1  0.541  0.041  0.082  1.0
  O  O20  1  0.077  0.577  0.153  1.0
  O  O21  1  0.616  0.116  0.231  1.0
  O  O22  1  0.770  0.270  0.540  1.0
  O  O23  1  0.923  0.423  0.845  1.0
  O  O24  1  0.692  0.192  0.385  1.0
  O  O25  1  1.000  0.500  1.000  1.0
[/CIF]
.