The material structure described by SrCa7Ti2Mn6O23 crystallizes in the triclinic P1 space group. Sr(1) is bonded in a distorted q6 geometry to one O(10), one O(11), one O(16), one O(17), one O(2), one O(20), one O(21), one O(4), one O(6), one O(8), and one O(9) atom. There are seven inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 12-coordinate geometry to one O(1), one O(10), one O(11), one O(16), one O(17), one O(20), one O(21), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a distorted q6 geometry to one O(10), one O(11), one O(18), one O(19), one O(2), one O(22), one O(23), one O(4), one O(6), one O(8), and one O(9) atom. In the third Ca site, Ca(3) is bonded to one O(1), one O(10), one O(11), one O(18), one O(19), one O(22), one O(23), one O(3), one O(5), one O(7), one O(8), and one O(9) atom to form distorted CaO12 cuboctahedra that share  a faceface with one Ti(2)O6 octahedra,  a faceface with one Mn(2)O6 octahedra,  a faceface with one Mn(3)O6 octahedra,  a faceface with one Mn(4)O6 octahedra,  a faceface with one Mn(5)O6 octahedra,  a faceface with one Mn(6)O6 octahedra,  a faceface with one Mn(1)O5 square pyramid, and  a faceface with one Ti(1)O5 trigonal bipyramid. In the fourth Ca site, Ca(4) is bonded in a distorted q6 geometry to one O(12), one O(13), one O(14), one O(15), one O(16), one O(17), one O(2), one O(20), one O(21), one O(4), and one O(6) atom. In the fifth Ca site, Ca(5) is bonded in a 11-coordinate geometry to one O(1), one O(13), one O(14), one O(15), one O(16), one O(17), one O(20), one O(21), one O(3), one O(5), and one O(7) atom. In the sixth Ca site, Ca(6) is bonded in a distorted q6 geometry to one O(12), one O(13), one O(14), one O(15), one O(18), one O(19), one O(2), one O(22), one O(23), one O(4), and one O(6) atom. In the seventh Ca site, Ca(7) is bonded in a 11-coordinate geometry to one O(1), one O(13), one O(14), one O(15), one O(18), one O(19), one O(22), one O(23), one O(3), one O(5), and one O(7) atom. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(12), one O(16), one O(18), and one O(8) atom to form TiO5 trigonal bipyramids that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Mn(1)O5 square pyramid, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-23°. In the second Ti site, Ti(2) is bonded to one O(12), one O(20), one O(22), one O(4), one O(5), and one O(8) atom to form TiO6 octahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Ti(1)O5 trigonal bipyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-4°. 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(19), and one O(9) atom to form MnO5 square pyramids that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Ti(1)O5 trigonal bipyramid, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-14°. In the second Mn site, Mn(2) is bonded to one O(10), one O(14), one O(16), one O(18), one O(2), and one O(3) atom to form MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Ti(1)O5 trigonal bipyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-6°. In the third Mn site, Mn(3) is bonded to one O(11), one O(15), one O(17), one O(19), one O(2), and one O(3) atom to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-7°. In the fourth Mn site, Mn(4) is bonded to one O(13), one O(21), one O(23), one O(4), one O(5), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the fifth Mn site, Mn(5) is bonded to one O(10), one O(14), one O(20), one O(22), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(15), one O(21), one O(23), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-7°. There are twenty-three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Ti(1), and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(1), one Ca(2), one Ca(4), one Ca(6), one Mn(2), and one Mn(3) atom. In the third O site, O(3) is bonded to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Mn(2), and one Mn(3) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(23)Ca4Mn2 octahedra, corners with two equivalent O(21)SrCa3Mn2 octahedra, edges with two equivalent O(7)Ca4Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(10)SrCa3Mn2 octahedra, and  a faceface with one O(11)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 53°. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Sr(1), one Ca(2), one Ca(4), one Ca(6), one Ti(2), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Ti(2), and one Mn(4) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Ca(2), one Ca(4), one Ca(6), one Mn(5), and one Mn(6) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(7)Ca4Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(10)SrCa3Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(21)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the seventh O site, O(7) is bonded to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Mn(5), and one Mn(6) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(6)SrCa3Mn2 octahedra, edges with two equivalent O(3)Ca4Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(10)SrCa3Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(21)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Ti(1), and one Ti(2) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(1), and one Mn(4) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(2), and one Mn(5) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(23)Ca4Mn2 octahedra, corners with two equivalent O(21)SrCa3Mn2 octahedra, edges with two equivalent O(11)SrCa3Mn2 octahedra,  a faceface with one O(3)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 54-57°. In the eleventh O site, O(11) is bonded to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(3), and one Mn(6) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(15)Ca4Mn2 octahedra, edges with two equivalent O(10)SrCa3Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(3)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(21)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 6°. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Ca(4), one Ca(6), one Ti(1), and one Ti(2) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Ca(4), one Ca(5), one Ca(6), one Ca(7), one Mn(1), and one Mn(4) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one Ca(4), one Ca(5), one Ca(6), one Ca(7), one Mn(2), and one Mn(5) atom. In the fifteenth O site, O(15) is bonded to one Ca(4), one Ca(5), one Ca(6), one Ca(7), one Mn(3), and one Mn(6) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(11)SrCa3Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(3)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(21)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 6°. In the sixteenth O site, O(16) is bonded in a 2-coordinate geometry to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Ti(1), and one Mn(2) atom. In the seventeenth O site, O(17) is bonded in a 2-coordinate geometry to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Mn(1), and one Mn(3) atom. In the eighteenth O site, O(18) is bonded in a 2-coordinate geometry to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Ti(1), and one Mn(2) atom. In the nineteenth O site, O(19) is bonded in a 2-coordinate geometry to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Mn(1), and one Mn(3) atom. In the twentieth O site, O(20) is bonded in a distorted linear geometry to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Ti(2), and one Mn(5) atom. In the twenty-first O site, O(21) is bonded to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Mn(4), and one Mn(6) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(23)Ca4Mn2 octahedra, corners with two equivalent O(3)Ca4Mn2 octahedra, corners with two equivalent O(10)SrCa3Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 5-57°. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Ti(2), and one Mn(5) atom. In the twenty-third O site, O(23) is bonded to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Mn(4), and one Mn(6) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(3)Ca4Mn2 octahedra, corners with two equivalent O(10)SrCa3Mn2 octahedra, corners with two equivalent O(21)SrCa3Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 5-55°. is represented by the CIF card [CIF]
data_SrCa7Ti2Mn6O23
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.682
_cell_length_b   7.675
_cell_length_c   7.716
_cell_angle_alpha   89.909
_cell_angle_beta   90.004
_cell_angle_gamma   90.002
_symmetry_Int_Tables_number   1
_cell_volume   454.973
_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  0.255  0.257  0.250  1.0
  Ca  Ca1  1  0.264  0.272  0.741  1.0
  Ca  Ca2  1  0.258  0.740  0.251  1.0
  Ca  Ca3  1  0.263  0.732  0.739  1.0
  Ca  Ca4  1  0.745  0.263  0.251  1.0
  Ca  Ca5  1  0.740  0.271  0.739  1.0
  Ca  Ca6  1  0.746  0.739  0.251  1.0
  Ca  Ca7  1  0.738  0.729  0.739  1.0
  Ti  Ti8  1  0.999  0.998  0.984  1.0
  Ti  Ti9  1  0.504  0.998  0.006  1.0
  Mn  Mn10  1  0.999  0.999  0.502  1.0
  Mn  Mn11  1  0.999  0.501  0.004  1.0
  Mn  Mn12  1  1.000  0.501  0.496  1.0
  Mn  Mn13  1  0.502  0.999  0.498  1.0
  Mn  Mn14  1  0.501  0.501  0.999  1.0
  Mn  Mn15  1  0.501  0.501  0.498  1.0
  O  O16  1  0.994  0.995  0.757  1.0
  O  O17  1  0.995  0.497  0.251  1.0
  O  O18  1  0.997  0.504  0.750  1.0
  O  O19  1  0.496  0.999  0.255  1.0
  O  O20  1  0.505  0.998  0.751  1.0
  O  O21  1  0.503  0.503  0.250  1.0
  O  O22  1  0.502  0.502  0.749  1.0
  O  O23  1  0.243  0.996  0.034  1.0
  O  O24  1  0.248  0.995  0.484  1.0
  O  O25  1  0.250  0.505  0.990  1.0
  O  O26  1  0.250  0.503  0.511  1.0
  O  O27  1  0.757  0.000  0.044  1.0
  O  O28  1  0.752  0.999  0.470  1.0
  O  O29  1  0.749  0.501  0.994  1.0
  O  O30  1  0.749  0.502  0.508  1.0
  O  O31  1  0.997  0.248  0.020  1.0
  O  O32  1  0.995  0.248  0.481  1.0
  O  O33  1  0.998  0.752  0.028  1.0
  O  O34  1  0.999  0.753  0.469  1.0
  O  O35  1  0.501  0.252  0.994  1.0
  O  O36  1  0.503  0.250  0.511  1.0
  O  O37  1  0.502  0.748  0.996  1.0
  O  O38  1  0.502  0.750  0.508  1.0
[/CIF]
.
The material structure described by SrCa7Ti2Mn6O23 crystallizes in the triclinic P1 space group. Sr(1) is bonded in a distorted q6 geometry to one O(10), one O(11), one O(16), one O(17), one O(2), one O(20), one O(21), one O(4), one O(6), one O(8), and one O(9) atom. There are seven inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 12-coordinate geometry to one O(1), one O(10), one O(11), one O(16), one O(17), one O(20), one O(21), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a distorted q6 geometry to one O(10), one O(11), one O(18), one O(19), one O(2), one O(22), one O(23), one O(4), one O(6), one O(8), and one O(9) atom. In the third Ca site, Ca(3) is bonded to one O(1), one O(10), one O(11), one O(18), one O(19), one O(22), one O(23), one O(3), one O(5), one O(7), one O(8), and one O(9) atom to form distorted CaO12 cuboctahedra that share  a faceface with one Ti(2)O6 octahedra,  a faceface with one Mn(2)O6 octahedra,  a faceface with one Mn(3)O6 octahedra,  a faceface with one Mn(4)O6 octahedra,  a faceface with one Mn(5)O6 octahedra,  a faceface with one Mn(6)O6 octahedra,  a faceface with one Mn(1)O5 square pyramid, and  a faceface with one Ti(1)O5 trigonal bipyramid. In the fourth Ca site, Ca(4) is bonded in a distorted q6 geometry to one O(12), one O(13), one O(14), one O(15), one O(16), one O(17), one O(2), one O(20), one O(21), one O(4), and one O(6) atom. In the fifth Ca site, Ca(5) is bonded in a 11-coordinate geometry to one O(1), one O(13), one O(14), one O(15), one O(16), one O(17), one O(20), one O(21), one O(3), one O(5), and one O(7) atom. In the sixth Ca site, Ca(6) is bonded in a distorted q6 geometry to one O(12), one O(13), one O(14), one O(15), one O(18), one O(19), one O(2), one O(22), one O(23), one O(4), and one O(6) atom. In the seventh Ca site, Ca(7) is bonded in a 11-coordinate geometry to one O(1), one O(13), one O(14), one O(15), one O(18), one O(19), one O(22), one O(23), one O(3), one O(5), and one O(7) atom. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(12), one O(16), one O(18), and one O(8) atom to form TiO5 trigonal bipyramids that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Mn(1)O5 square pyramid, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-23°. In the second Ti site, Ti(2) is bonded to one O(12), one O(20), one O(22), one O(4), one O(5), and one O(8) atom to form TiO6 octahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Ti(1)O5 trigonal bipyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-4°. 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(19), and one O(9) atom to form MnO5 square pyramids that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Ti(1)O5 trigonal bipyramid, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-14°. In the second Mn site, Mn(2) is bonded to one O(10), one O(14), one O(16), one O(18), one O(2), and one O(3) atom to form MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Ti(1)O5 trigonal bipyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-6°. In the third Mn site, Mn(3) is bonded to one O(11), one O(15), one O(17), one O(19), one O(2), and one O(3) atom to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-7°. In the fourth Mn site, Mn(4) is bonded to one O(13), one O(21), one O(23), one O(4), one O(5), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the fifth Mn site, Mn(5) is bonded to one O(10), one O(14), one O(20), one O(22), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(15), one O(21), one O(23), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, and  a faceface with one Ca(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-7°. There are twenty-three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Ti(1), and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(1), one Ca(2), one Ca(4), one Ca(6), one Mn(2), and one Mn(3) atom. In the third O site, O(3) is bonded to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Mn(2), and one Mn(3) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(23)Ca4Mn2 octahedra, corners with two equivalent O(21)SrCa3Mn2 octahedra, edges with two equivalent O(7)Ca4Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(10)SrCa3Mn2 octahedra, and  a faceface with one O(11)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 53°. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Sr(1), one Ca(2), one Ca(4), one Ca(6), one Ti(2), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Ti(2), and one Mn(4) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Ca(2), one Ca(4), one Ca(6), one Mn(5), and one Mn(6) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(7)Ca4Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(10)SrCa3Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(21)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the seventh O site, O(7) is bonded to one Ca(1), one Ca(3), one Ca(5), one Ca(7), one Mn(5), and one Mn(6) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(6)SrCa3Mn2 octahedra, edges with two equivalent O(3)Ca4Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(10)SrCa3Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(21)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Ti(1), and one Ti(2) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(1), and one Mn(4) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(2), and one Mn(5) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(23)Ca4Mn2 octahedra, corners with two equivalent O(21)SrCa3Mn2 octahedra, edges with two equivalent O(11)SrCa3Mn2 octahedra,  a faceface with one O(3)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 54-57°. In the eleventh O site, O(11) is bonded to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(3), and one Mn(6) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(15)Ca4Mn2 octahedra, edges with two equivalent O(10)SrCa3Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(3)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(21)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 6°. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Ca(4), one Ca(6), one Ti(1), and one Ti(2) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Ca(4), one Ca(5), one Ca(6), one Ca(7), one Mn(1), and one Mn(4) atom. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one Ca(4), one Ca(5), one Ca(6), one Ca(7), one Mn(2), and one Mn(5) atom. In the fifteenth O site, O(15) is bonded to one Ca(4), one Ca(5), one Ca(6), one Ca(7), one Mn(3), and one Mn(6) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(11)SrCa3Mn2 octahedra,  a faceface with one O(23)Ca4Mn2 octahedra,  a faceface with one O(3)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(21)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 6°. In the sixteenth O site, O(16) is bonded in a 2-coordinate geometry to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Ti(1), and one Mn(2) atom. In the seventeenth O site, O(17) is bonded in a 2-coordinate geometry to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Mn(1), and one Mn(3) atom. In the eighteenth O site, O(18) is bonded in a 2-coordinate geometry to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Ti(1), and one Mn(2) atom. In the nineteenth O site, O(19) is bonded in a 2-coordinate geometry to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Mn(1), and one Mn(3) atom. In the twentieth O site, O(20) is bonded in a distorted linear geometry to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Ti(2), and one Mn(5) atom. In the twenty-first O site, O(21) is bonded to one Sr(1), one Ca(1), one Ca(4), one Ca(5), one Mn(4), and one Mn(6) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(23)Ca4Mn2 octahedra, corners with two equivalent O(3)Ca4Mn2 octahedra, corners with two equivalent O(10)SrCa3Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 5-57°. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Ti(2), and one Mn(5) atom. In the twenty-third O site, O(23) is bonded to one Ca(2), one Ca(3), one Ca(6), one Ca(7), one Mn(4), and one Mn(6) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(3)Ca4Mn2 octahedra, corners with two equivalent O(10)SrCa3Mn2 octahedra, corners with two equivalent O(21)SrCa3Mn2 octahedra,  a faceface with one O(15)Ca4Mn2 octahedra,  a faceface with one O(7)Ca4Mn2 octahedra,  a faceface with one O(11)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 5-55°. is represented by the CIF card [CIF]
data_SrCa7Ti2Mn6O23
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.682
_cell_length_b   7.675
_cell_length_c   7.716
_cell_angle_alpha   89.909
_cell_angle_beta   90.004
_cell_angle_gamma   90.002
_symmetry_Int_Tables_number   1
_cell_volume   454.973
_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  0.255  0.257  0.250  1.0
  Ca  Ca1  1  0.264  0.272  0.741  1.0
  Ca  Ca2  1  0.258  0.740  0.251  1.0
  Ca  Ca3  1  0.263  0.732  0.739  1.0
  Ca  Ca4  1  0.745  0.263  0.251  1.0
  Ca  Ca5  1  0.740  0.271  0.739  1.0
  Ca  Ca6  1  0.746  0.739  0.251  1.0
  Ca  Ca7  1  0.738  0.729  0.739  1.0
  Ti  Ti8  1  0.999  0.998  0.984  1.0
  Ti  Ti9  1  0.504  0.998  0.006  1.0
  Mn  Mn10  1  0.999  0.999  0.502  1.0
  Mn  Mn11  1  0.999  0.501  0.004  1.0
  Mn  Mn12  1  1.000  0.501  0.496  1.0
  Mn  Mn13  1  0.502  0.999  0.498  1.0
  Mn  Mn14  1  0.501  0.501  0.999  1.0
  Mn  Mn15  1  0.501  0.501  0.498  1.0
  O  O16  1  0.994  0.995  0.757  1.0
  O  O17  1  0.995  0.497  0.251  1.0
  O  O18  1  0.997  0.504  0.750  1.0
  O  O19  1  0.496  0.999  0.255  1.0
  O  O20  1  0.505  0.998  0.751  1.0
  O  O21  1  0.503  0.503  0.250  1.0
  O  O22  1  0.502  0.502  0.749  1.0
  O  O23  1  0.243  0.996  0.034  1.0
  O  O24  1  0.248  0.995  0.484  1.0
  O  O25  1  0.250  0.505  0.990  1.0
  O  O26  1  0.250  0.503  0.511  1.0
  O  O27  1  0.757  0.000  0.044  1.0
  O  O28  1  0.752  0.999  0.470  1.0
  O  O29  1  0.749  0.501  0.994  1.0
  O  O30  1  0.749  0.502  0.508  1.0
  O  O31  1  0.997  0.248  0.020  1.0
  O  O32  1  0.995  0.248  0.481  1.0
  O  O33  1  0.998  0.752  0.028  1.0
  O  O34  1  0.999  0.753  0.469  1.0
  O  O35  1  0.501  0.252  0.994  1.0
  O  O36  1  0.503  0.250  0.511  1.0
  O  O37  1  0.502  0.748  0.996  1.0
  O  O38  1  0.502  0.750  0.508  1.0
[/CIF]
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