The crystal structure described by CaMg14MnO16 is alpha Po-derived structured and crystallizes in the tetragonal P4/mmm space group. Ca(1) is bonded to two equivalent O(4) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra; corners with four equivalent Mg(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; and edges with eight Mg(2,2)O6 octahedra. The corner-sharing octahedra are not tilted. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra; corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mn(1)O6 octahedra; edges with four Mg(2,2)O6 octahedra; edges with four Mg(3,3)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra; corners with four Mg(2,2)O6 octahedra; edges with two equivalent Ca(1)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third Mg site, Mg(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra; corners with four Mg(2,2)O6 octahedra; edges with two equivalent Ca(1)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourth Mg site, Mg(3) is bonded to one O(5), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra; corners with four Mg(3,3)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; edges with two equivalent Mn(1)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the fifth Mg site, Mg(3) is bonded to one O(5), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra; corners with four Mg(3,3)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; edges with two equivalent Mn(1)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the sixth Mg site, Mg(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(4)O6 octahedra,  an edgeedge with one Ca(1)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with four equivalent Mg(2)O6 octahedra, and edges with four equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-5°. Mn(1) is bonded to two equivalent O(6) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra; corners with four equivalent Mg(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; and edges with eight Mg(3,3)O6 octahedra. The corner-sharing octahedra are not tilted. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Mg(1), two equivalent Mg(2), and two equivalent Mg(4) atoms to form OCaMg5 octahedra that share corners with two equivalent O(2)Mg5Mn octahedra, corners with four equivalent O(1)CaMg5 octahedra, edges with two equivalent O(4)Ca2Mg4 octahedra, edges with two equivalent O(1)CaMg5 octahedra, edges with two equivalent O(2)Mg5Mn octahedra, edges with two equivalent O(5)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), and one Mn(1) atom to form OMg5Mn octahedra that share corners with two equivalent O(1)CaMg5 octahedra, corners with four equivalent O(2)Mg5Mn octahedra, edges with two equivalent O(1)CaMg5 octahedra, edges with two equivalent O(6)Mg4Mn2 octahedra, edges with two equivalent O(2)Mg5Mn octahedra, edges with two equivalent O(5)Mg6 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(3) is bonded to two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)Ca2Mg4 octahedra,  an edgeedge with one O(6)Mg4Mn2 octahedra, edges with two equivalent O(5)Mg6 octahedra, edges with four equivalent O(1)CaMg5 octahedra, and edges with four equivalent O(2)Mg5Mn octahedra. The corner-sharing octahedral tilt angles range from 1-3°. In the fourth O site, O(4) is bonded to two equivalent Ca(1) and four Mg(2,2) atoms to form OCa2Mg4 octahedra that share corners with two equivalent O(4)Ca2Mg4 octahedra, corners with four equivalent O(5)Mg6 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with eight equivalent O(1)CaMg5 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Mg(1); two Mg(2,2); and two Mg(3,3) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Ca2Mg4 octahedra, corners with two equivalent O(6)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra, edges with four equivalent O(1)CaMg5 octahedra, edges with four equivalent O(2)Mg5Mn octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to four Mg(3,3) and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(6)Mg4Mn2 octahedra, corners with four equivalent O(5)Mg6 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with eight equivalent O(2)Mg5Mn octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaMg14MnO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.629
_cell_length_b   8.629
_cell_length_c   4.339
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   323.073
_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
  Ca  Ca0  1  0.000  0.000  0.000  1.0
  Mg  Mg1  1  0.500  0.000  0.000  1.0
  Mg  Mg2  1  0.000  0.500  0.000  1.0
  Mg  Mg3  1  0.255  0.000  0.500  1.0
  Mg  Mg4  1  0.745  0.000  0.500  1.0
  Mg  Mg5  1  0.248  0.500  0.500  1.0
  Mg  Mg6  1  0.752  0.500  0.500  1.0
  Mg  Mg7  1  0.000  0.255  0.500  1.0
  Mg  Mg8  1  0.500  0.248  0.500  1.0
  Mg  Mg9  1  0.000  0.745  0.500  1.0
  Mg  Mg10  1  0.500  0.752  0.500  1.0
  Mg  Mg11  1  0.252  0.252  0.000  1.0
  Mg  Mg12  1  0.748  0.252  0.000  1.0
  Mg  Mg13  1  0.252  0.748  0.000  1.0
  Mg  Mg14  1  0.748  0.748  0.000  1.0
  Mn  Mn15  1  0.500  0.500  0.000  1.0
  O  O16  1  0.000  0.263  0.000  1.0
  O  O17  1  0.500  0.245  0.000  1.0
  O  O18  1  0.000  0.737  0.000  1.0
  O  O19  1  0.500  0.755  0.000  1.0
  O  O20  1  0.250  0.250  0.500  1.0
  O  O21  1  0.750  0.250  0.500  1.0
  O  O22  1  0.250  0.750  0.500  1.0
  O  O23  1  0.750  0.750  0.500  1.0
  O  O24  1  0.000  0.000  0.500  1.0
  O  O25  1  0.500  0.000  0.500  1.0
  O  O26  1  0.000  0.500  0.500  1.0
  O  O27  1  0.500  0.500  0.500  1.0
  O  O28  1  0.263  0.000  0.000  1.0
  O  O29  1  0.737  0.000  0.000  1.0
  O  O30  1  0.245  0.500  0.000  1.0
  O  O31  1  0.755  0.500  0.000  1.0
[/CIF]
.
The crystal structure described by CaMg14MnO16 is alpha Po-derived structured and crystallizes in the tetragonal P4/mmm space group. Ca(1) is bonded to two equivalent O(4) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra; corners with four equivalent Mg(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; and edges with eight Mg(2,2)O6 octahedra. The corner-sharing octahedra are not tilted. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra; corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mn(1)O6 octahedra; edges with four Mg(2,2)O6 octahedra; edges with four Mg(3,3)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra; corners with four Mg(2,2)O6 octahedra; edges with two equivalent Ca(1)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third Mg site, Mg(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(3)O6 octahedra; corners with four Mg(2,2)O6 octahedra; edges with two equivalent Ca(1)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourth Mg site, Mg(3) is bonded to one O(5), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra; corners with four Mg(3,3)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; edges with two equivalent Mn(1)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the fifth Mg site, Mg(3) is bonded to one O(5), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra; corners with four Mg(3,3)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two Mg(2,2)O6 octahedra; edges with two Mg(3,3)O6 octahedra; edges with two equivalent Mn(1)O6 octahedra; and edges with four equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the sixth Mg site, Mg(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(4)O6 octahedra,  an edgeedge with one Ca(1)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with four equivalent Mg(2)O6 octahedra, and edges with four equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-5°. Mn(1) is bonded to two equivalent O(6) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra; corners with four equivalent Mg(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; and edges with eight Mg(3,3)O6 octahedra. The corner-sharing octahedra are not tilted. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Mg(1), two equivalent Mg(2), and two equivalent Mg(4) atoms to form OCaMg5 octahedra that share corners with two equivalent O(2)Mg5Mn octahedra, corners with four equivalent O(1)CaMg5 octahedra, edges with two equivalent O(4)Ca2Mg4 octahedra, edges with two equivalent O(1)CaMg5 octahedra, edges with two equivalent O(2)Mg5Mn octahedra, edges with two equivalent O(5)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), and one Mn(1) atom to form OMg5Mn octahedra that share corners with two equivalent O(1)CaMg5 octahedra, corners with four equivalent O(2)Mg5Mn octahedra, edges with two equivalent O(1)CaMg5 octahedra, edges with two equivalent O(6)Mg4Mn2 octahedra, edges with two equivalent O(2)Mg5Mn octahedra, edges with two equivalent O(5)Mg6 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(3) is bonded to two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)Ca2Mg4 octahedra,  an edgeedge with one O(6)Mg4Mn2 octahedra, edges with two equivalent O(5)Mg6 octahedra, edges with four equivalent O(1)CaMg5 octahedra, and edges with four equivalent O(2)Mg5Mn octahedra. The corner-sharing octahedral tilt angles range from 1-3°. In the fourth O site, O(4) is bonded to two equivalent Ca(1) and four Mg(2,2) atoms to form OCa2Mg4 octahedra that share corners with two equivalent O(4)Ca2Mg4 octahedra, corners with four equivalent O(5)Mg6 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with eight equivalent O(1)CaMg5 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Mg(1); two Mg(2,2); and two Mg(3,3) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Ca2Mg4 octahedra, corners with two equivalent O(6)Mg4Mn2 octahedra, corners with two equivalent O(5)Mg6 octahedra, edges with four equivalent O(1)CaMg5 octahedra, edges with four equivalent O(2)Mg5Mn octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to four Mg(3,3) and two equivalent Mn(1) atoms to form OMg4Mn2 octahedra that share corners with two equivalent O(6)Mg4Mn2 octahedra, corners with four equivalent O(5)Mg6 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with eight equivalent O(2)Mg5Mn octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaMg14MnO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.629
_cell_length_b   8.629
_cell_length_c   4.339
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   323.073
_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
  Ca  Ca0  1  0.000  0.000  0.000  1.0
  Mg  Mg1  1  0.500  0.000  0.000  1.0
  Mg  Mg2  1  0.000  0.500  0.000  1.0
  Mg  Mg3  1  0.255  0.000  0.500  1.0
  Mg  Mg4  1  0.745  0.000  0.500  1.0
  Mg  Mg5  1  0.248  0.500  0.500  1.0
  Mg  Mg6  1  0.752  0.500  0.500  1.0
  Mg  Mg7  1  0.000  0.255  0.500  1.0
  Mg  Mg8  1  0.500  0.248  0.500  1.0
  Mg  Mg9  1  0.000  0.745  0.500  1.0
  Mg  Mg10  1  0.500  0.752  0.500  1.0
  Mg  Mg11  1  0.252  0.252  0.000  1.0
  Mg  Mg12  1  0.748  0.252  0.000  1.0
  Mg  Mg13  1  0.252  0.748  0.000  1.0
  Mg  Mg14  1  0.748  0.748  0.000  1.0
  Mn  Mn15  1  0.500  0.500  0.000  1.0
  O  O16  1  0.000  0.263  0.000  1.0
  O  O17  1  0.500  0.245  0.000  1.0
  O  O18  1  0.000  0.737  0.000  1.0
  O  O19  1  0.500  0.755  0.000  1.0
  O  O20  1  0.250  0.250  0.500  1.0
  O  O21  1  0.750  0.250  0.500  1.0
  O  O22  1  0.250  0.750  0.500  1.0
  O  O23  1  0.750  0.750  0.500  1.0
  O  O24  1  0.000  0.000  0.500  1.0
  O  O25  1  0.500  0.000  0.500  1.0
  O  O26  1  0.000  0.500  0.500  1.0
  O  O27  1  0.500  0.500  0.500  1.0
  O  O28  1  0.263  0.000  0.000  1.0
  O  O29  1  0.737  0.000  0.000  1.0
  O  O30  1  0.245  0.500  0.000  1.0
  O  O31  1  0.755  0.500  0.000  1.0
[/CIF]
.