The structure described by SrCa7Mn8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. Sr(1) is bonded to twelve equivalent O(1) atoms to form SrO12 cuboctahedra that share corners with twelve equivalent Ca(2)O12 cuboctahedra, faces with six equivalent Ca(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form CaO12 cuboctahedra that share corners with four equivalent Ca(3)O12 cuboctahedra, corners with eight equivalent Ca(1)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Ca(2)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. In the second Ca site, Ca(2) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form CaO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with eight equivalent Ca(2)O12 cuboctahedra, faces with two equivalent Ca(3)O12 cuboctahedra, faces with four equivalent Ca(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. In the third Ca site, Ca(3) is bonded to twelve equivalent O(2) atoms to form CaO12 cuboctahedra that share corners with twelve equivalent Ca(1)O12 cuboctahedra, faces with six equivalent Ca(2)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. Mn(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Ca(3)O12 cuboctahedra, faces with three equivalent Ca(1)O12 cuboctahedra, and faces with three equivalent Ca(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), one Ca(2), two equivalent Ca(1), 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(3), two equivalent Ca(2), and two equivalent Mn(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCa7Mn8O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.619
_cell_length_b   7.619
_cell_length_c   7.619
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   442.265
_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  0.250  0.250  0.250  1.0
  Ca  Ca1  1  0.250  0.250  0.750  1.0
  Ca  Ca2  1  0.250  0.750  0.250  1.0
  Ca  Ca3  1  0.250  0.750  0.750  1.0
  Ca  Ca4  1  0.750  0.250  0.250  1.0
  Ca  Ca5  1  0.750  0.250  0.750  1.0
  Ca  Ca6  1  0.750  0.750  0.250  1.0
  Ca  Ca7  1  0.750  0.750  0.750  1.0
  Mn  Mn8  1  1.000  1.000  1.000  1.0
  Mn  Mn9  1  1.000  1.000  0.500  1.0
  Mn  Mn10  1  1.000  0.500  1.000  1.0
  Mn  Mn11  1  1.000  0.500  0.500  1.0
  Mn  Mn12  1  0.500  1.000  1.000  1.0
  Mn  Mn13  1  0.500  1.000  0.500  1.0
  Mn  Mn14  1  0.500  0.500  1.000  1.0
  Mn  Mn15  1  0.500  0.500  0.500  1.0
  O  O16  1  0.998  0.998  0.250  1.0
  O  O17  1  1.000  1.000  0.750  1.0
  O  O18  1  0.998  0.502  0.250  1.0
  O  O19  1  1.000  0.500  0.750  1.0
  O  O20  1  0.502  0.998  0.250  1.0
  O  O21  1  0.500  1.000  0.750  1.0
  O  O22  1  0.502  0.502  0.250  1.0
  O  O23  1  0.500  0.500  0.750  1.0
  O  O24  1  0.250  0.998  0.998  1.0
  O  O25  1  0.250  0.998  0.502  1.0
  O  O26  1  0.250  0.502  0.998  1.0
  O  O27  1  0.250  0.502  0.502  1.0
  O  O28  1  0.750  1.000  1.000  1.0
  O  O29  1  0.750  1.000  0.500  1.0
  O  O30  1  0.750  0.500  1.000  1.0
  O  O31  1  0.750  0.500  0.500  1.0
  O  O32  1  0.998  0.250  0.998  1.0
  O  O33  1  0.998  0.250  0.502  1.0
  O  O34  1  1.000  0.750  1.000  1.0
  O  O35  1  1.000  0.750  0.500  1.0
  O  O36  1  0.502  0.250  0.998  1.0
  O  O37  1  0.502  0.250  0.502  1.0
  O  O38  1  0.500  0.750  1.000  1.0
  O  O39  1  0.500  0.750  0.500  1.0
[/CIF]
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The structure described by SrCa7Mn8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. Sr(1) is bonded to twelve equivalent O(1) atoms to form SrO12 cuboctahedra that share corners with twelve equivalent Ca(2)O12 cuboctahedra, faces with six equivalent Ca(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form CaO12 cuboctahedra that share corners with four equivalent Ca(3)O12 cuboctahedra, corners with eight equivalent Ca(1)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Ca(2)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. In the second Ca site, Ca(2) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form CaO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with eight equivalent Ca(2)O12 cuboctahedra, faces with two equivalent Ca(3)O12 cuboctahedra, faces with four equivalent Ca(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. In the third Ca site, Ca(3) is bonded to twelve equivalent O(2) atoms to form CaO12 cuboctahedra that share corners with twelve equivalent Ca(1)O12 cuboctahedra, faces with six equivalent Ca(2)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. Mn(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Ca(3)O12 cuboctahedra, faces with three equivalent Ca(1)O12 cuboctahedra, and faces with three equivalent Ca(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), one Ca(2), two equivalent Ca(1), 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(3), two equivalent Ca(2), and two equivalent Mn(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCa7Mn8O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.619
_cell_length_b   7.619
_cell_length_c   7.619
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   442.265
_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  0.250  0.250  0.250  1.0
  Ca  Ca1  1  0.250  0.250  0.750  1.0
  Ca  Ca2  1  0.250  0.750  0.250  1.0
  Ca  Ca3  1  0.250  0.750  0.750  1.0
  Ca  Ca4  1  0.750  0.250  0.250  1.0
  Ca  Ca5  1  0.750  0.250  0.750  1.0
  Ca  Ca6  1  0.750  0.750  0.250  1.0
  Ca  Ca7  1  0.750  0.750  0.750  1.0
  Mn  Mn8  1  1.000  1.000  1.000  1.0
  Mn  Mn9  1  1.000  1.000  0.500  1.0
  Mn  Mn10  1  1.000  0.500  1.000  1.0
  Mn  Mn11  1  1.000  0.500  0.500  1.0
  Mn  Mn12  1  0.500  1.000  1.000  1.0
  Mn  Mn13  1  0.500  1.000  0.500  1.0
  Mn  Mn14  1  0.500  0.500  1.000  1.0
  Mn  Mn15  1  0.500  0.500  0.500  1.0
  O  O16  1  0.998  0.998  0.250  1.0
  O  O17  1  1.000  1.000  0.750  1.0
  O  O18  1  0.998  0.502  0.250  1.0
  O  O19  1  1.000  0.500  0.750  1.0
  O  O20  1  0.502  0.998  0.250  1.0
  O  O21  1  0.500  1.000  0.750  1.0
  O  O22  1  0.502  0.502  0.250  1.0
  O  O23  1  0.500  0.500  0.750  1.0
  O  O24  1  0.250  0.998  0.998  1.0
  O  O25  1  0.250  0.998  0.502  1.0
  O  O26  1  0.250  0.502  0.998  1.0
  O  O27  1  0.250  0.502  0.502  1.0
  O  O28  1  0.750  1.000  1.000  1.0
  O  O29  1  0.750  1.000  0.500  1.0
  O  O30  1  0.750  0.500  1.000  1.0
  O  O31  1  0.750  0.500  0.500  1.0
  O  O32  1  0.998  0.250  0.998  1.0
  O  O33  1  0.998  0.250  0.502  1.0
  O  O34  1  1.000  0.750  1.000  1.0
  O  O35  1  1.000  0.750  0.500  1.0
  O  O36  1  0.502  0.250  0.998  1.0
  O  O37  1  0.502  0.250  0.502  1.0
  O  O38  1  0.500  0.750  1.000  1.0
  O  O39  1  0.500  0.750  0.500  1.0
[/CIF]
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