The compound described by SrCa7Mn6Al2O22 crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a distorted q6 geometry to one O(3), two equivalent O(1), four equivalent O(5), and four equivalent O(6) atoms. There are five inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a distorted q6 geometry to one O(4), two equivalent O(2), four equivalent O(5), and four equivalent O(6) atoms. In the second Ca site, Ca(2) is bonded in a distorted q6 geometry to one O(3), two equivalent O(1), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. In the third Ca site, Ca(3) is bonded in a distorted q6 geometry to one O(4), two equivalent O(2), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. In the fourth Ca site, Ca(4) is bonded in a distorted q6 geometry to one O(3), two equivalent O(1), four equivalent O(7), and four equivalent O(8) atoms. In the fifth Ca site, Ca(5) is bonded in a distorted q6 geometry to one O(4), two equivalent O(2), four equivalent O(7), and four equivalent O(8) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), two equivalent O(6), and two equivalent O(8) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Al(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), one Ca(4), two equivalent Ca(2), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one Ca(1), one Ca(5), two equivalent Ca(3), and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded to one Sr(1), one Ca(4), two equivalent Ca(2), and two equivalent Mn(2) atoms to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(4)Ca4Mn2 octahedra, faces with four equivalent O(8)Ca4Mn2 octahedra, and faces with four equivalent O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fourth O site, O(4) is bonded to one Ca(1), one Ca(5), two equivalent Ca(3), and two equivalent Mn(2) atoms to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(3)SrCa3Mn2 octahedra, faces with four equivalent O(8)Ca4Mn2 octahedra, and faces with four equivalent O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fifth O site, O(5) 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 Al(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(1), and one Mn(2) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(6)SrCa3Mn2 octahedra, corners with four equivalent O(8)Ca4Mn2 octahedra, edges with two equivalent O(6)SrCa3Mn2 octahedra,  a faceface with one O(4)Ca4Mn2 octahedra,  a faceface with one O(8)Ca4Mn2 octahedra,  a faceface with one O(3)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 1-57°. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Ca(2), one Ca(3), one Ca(4), one Ca(5), one Mn(1), and one Al(1) atom. In the eighth O site, O(8) is bonded to one Ca(2), one Ca(3), one Ca(4), one Ca(5), one Mn(1), and one Mn(2) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(8)Ca4Mn2 octahedra, corners with four equivalent O(6)SrCa3Mn2 octahedra, edges with two equivalent O(8)Ca4Mn2 octahedra,  a faceface with one O(4)Ca4Mn2 octahedra,  a faceface with one O(8)Ca4Mn2 octahedra,  a faceface with one O(3)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 1-54°. is represented by the CIF file [CIF]
data_SrCa7Mn6Al2O22
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.661
_cell_length_b   7.661
_cell_length_c   7.593
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.980
_symmetry_Int_Tables_number   1
_cell_volume   445.664
_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  0.259  0.259  0.250  1.0
  Ca  Ca1  1  0.267  0.267  0.750  1.0
  Ca  Ca2  1  0.267  0.734  0.250  1.0
  Ca  Ca3  1  0.267  0.734  0.750  1.0
  Ca  Ca4  1  0.734  0.267  0.250  1.0
  Ca  Ca5  1  0.734  0.267  0.750  1.0
  Ca  Ca6  1  0.734  0.734  0.250  1.0
  Ca  Ca7  1  0.733  0.733  0.750  1.0
  Mn  Mn8  1  0.999  0.501  0.999  1.0
  Mn  Mn9  1  0.999  0.501  0.501  1.0
  Mn  Mn10  1  0.501  0.999  0.999  1.0
  Mn  Mn11  1  0.501  0.999  0.501  1.0
  Mn  Mn12  1  0.501  0.501  0.999  1.0
  Mn  Mn13  1  0.501  0.501  0.501  1.0
  Al  Al14  1  0.999  0.999  0.997  1.0
  Al  Al15  1  0.999  0.999  0.503  1.0
  O  O16  1  0.997  0.502  0.250  1.0
  O  O17  1  0.999  0.501  0.750  1.0
  O  O18  1  0.502  0.997  0.250  1.0
  O  O19  1  0.501  0.999  0.750  1.0
  O  O20  1  0.503  0.503  0.250  1.0
  O  O21  1  0.501  0.501  0.750  1.0
  O  O22  1  0.237  0.998  0.997  1.0
  O  O23  1  0.237  0.998  0.503  1.0
  O  O24  1  0.250  0.503  0.997  1.0
  O  O25  1  0.250  0.503  0.503  1.0
  O  O26  1  0.762  0.999  1.000  1.0
  O  O27  1  0.762  0.999  0.500  1.0
  O  O28  1  0.750  0.501  0.999  1.0
  O  O29  1  0.750  0.501  0.501  1.0
  O  O30  1  0.998  0.237  0.997  1.0
  O  O31  1  0.998  0.237  0.503  1.0
  O  O32  1  0.999  0.762  1.000  1.0
  O  O33  1  0.999  0.762  0.500  1.0
  O  O34  1  0.503  0.250  0.997  1.0
  O  O35  1  0.503  0.250  0.503  1.0
  O  O36  1  0.501  0.750  0.999  1.0
  O  O37  1  0.501  0.750  0.501  1.0
[/CIF]
.
The compound described by SrCa7Mn6Al2O22 crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a distorted q6 geometry to one O(3), two equivalent O(1), four equivalent O(5), and four equivalent O(6) atoms. There are five inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a distorted q6 geometry to one O(4), two equivalent O(2), four equivalent O(5), and four equivalent O(6) atoms. In the second Ca site, Ca(2) is bonded in a distorted q6 geometry to one O(3), two equivalent O(1), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. In the third Ca site, Ca(3) is bonded in a distorted q6 geometry to one O(4), two equivalent O(2), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. In the fourth Ca site, Ca(4) is bonded in a distorted q6 geometry to one O(3), two equivalent O(1), four equivalent O(7), and four equivalent O(8) atoms. In the fifth Ca site, Ca(5) is bonded in a distorted q6 geometry to one O(4), two equivalent O(2), four equivalent O(7), and four equivalent O(8) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), two equivalent O(6), and two equivalent O(8) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Al(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), one Ca(4), two equivalent Ca(2), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one Ca(1), one Ca(5), two equivalent Ca(3), and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded to one Sr(1), one Ca(4), two equivalent Ca(2), and two equivalent Mn(2) atoms to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(4)Ca4Mn2 octahedra, faces with four equivalent O(8)Ca4Mn2 octahedra, and faces with four equivalent O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fourth O site, O(4) is bonded to one Ca(1), one Ca(5), two equivalent Ca(3), and two equivalent Mn(2) atoms to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(3)SrCa3Mn2 octahedra, faces with four equivalent O(8)Ca4Mn2 octahedra, and faces with four equivalent O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fifth O site, O(5) 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 Al(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Ca(1), one Ca(2), one Ca(3), one Mn(1), and one Mn(2) atom to form distorted OSrCa3Mn2 octahedra that share corners with two equivalent O(6)SrCa3Mn2 octahedra, corners with four equivalent O(8)Ca4Mn2 octahedra, edges with two equivalent O(6)SrCa3Mn2 octahedra,  a faceface with one O(4)Ca4Mn2 octahedra,  a faceface with one O(8)Ca4Mn2 octahedra,  a faceface with one O(3)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 1-57°. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Ca(2), one Ca(3), one Ca(4), one Ca(5), one Mn(1), and one Al(1) atom. In the eighth O site, O(8) is bonded to one Ca(2), one Ca(3), one Ca(4), one Ca(5), one Mn(1), and one Mn(2) atom to form distorted OCa4Mn2 octahedra that share corners with two equivalent O(8)Ca4Mn2 octahedra, corners with four equivalent O(6)SrCa3Mn2 octahedra, edges with two equivalent O(8)Ca4Mn2 octahedra,  a faceface with one O(4)Ca4Mn2 octahedra,  a faceface with one O(8)Ca4Mn2 octahedra,  a faceface with one O(3)SrCa3Mn2 octahedra, and  a faceface with one O(6)SrCa3Mn2 octahedra. The corner-sharing octahedral tilt angles range from 1-54°. is represented by the CIF file [CIF]
data_SrCa7Mn6Al2O22
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.661
_cell_length_b   7.661
_cell_length_c   7.593
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.980
_symmetry_Int_Tables_number   1
_cell_volume   445.664
_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  0.259  0.259  0.250  1.0
  Ca  Ca1  1  0.267  0.267  0.750  1.0
  Ca  Ca2  1  0.267  0.734  0.250  1.0
  Ca  Ca3  1  0.267  0.734  0.750  1.0
  Ca  Ca4  1  0.734  0.267  0.250  1.0
  Ca  Ca5  1  0.734  0.267  0.750  1.0
  Ca  Ca6  1  0.734  0.734  0.250  1.0
  Ca  Ca7  1  0.733  0.733  0.750  1.0
  Mn  Mn8  1  0.999  0.501  0.999  1.0
  Mn  Mn9  1  0.999  0.501  0.501  1.0
  Mn  Mn10  1  0.501  0.999  0.999  1.0
  Mn  Mn11  1  0.501  0.999  0.501  1.0
  Mn  Mn12  1  0.501  0.501  0.999  1.0
  Mn  Mn13  1  0.501  0.501  0.501  1.0
  Al  Al14  1  0.999  0.999  0.997  1.0
  Al  Al15  1  0.999  0.999  0.503  1.0
  O  O16  1  0.997  0.502  0.250  1.0
  O  O17  1  0.999  0.501  0.750  1.0
  O  O18  1  0.502  0.997  0.250  1.0
  O  O19  1  0.501  0.999  0.750  1.0
  O  O20  1  0.503  0.503  0.250  1.0
  O  O21  1  0.501  0.501  0.750  1.0
  O  O22  1  0.237  0.998  0.997  1.0
  O  O23  1  0.237  0.998  0.503  1.0
  O  O24  1  0.250  0.503  0.997  1.0
  O  O25  1  0.250  0.503  0.503  1.0
  O  O26  1  0.762  0.999  1.000  1.0
  O  O27  1  0.762  0.999  0.500  1.0
  O  O28  1  0.750  0.501  0.999  1.0
  O  O29  1  0.750  0.501  0.501  1.0
  O  O30  1  0.998  0.237  0.997  1.0
  O  O31  1  0.998  0.237  0.503  1.0
  O  O32  1  0.999  0.762  1.000  1.0
  O  O33  1  0.999  0.762  0.500  1.0
  O  O34  1  0.503  0.250  0.997  1.0
  O  O35  1  0.503  0.250  0.503  1.0
  O  O36  1  0.501  0.750  0.999  1.0
  O  O37  1  0.501  0.750  0.501  1.0
[/CIF]
.