The compound described by La7ScAl8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(3)O12 cuboctahedra, corners with eight equivalent La(1)O12 cuboctahedra, faces with two equivalent Sc(1)O12 cuboctahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. In the second La site, La(2) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with four equivalent Sc(1)O12 cuboctahedra, corners with eight equivalent La(2)O12 cuboctahedra, faces with two equivalent La(3)O12 cuboctahedra, faces with four equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. In the third La site, La(3) is bonded to twelve equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with twelve equivalent La(1)O12 cuboctahedra, faces with six equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. Sc(1) is bonded to twelve equivalent O(1) atoms to form ScO12 cuboctahedra that share corners with twelve equivalent La(2)O12 cuboctahedra, faces with six equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. Al(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent Al(1)O6 octahedra,  a faceface with one La(3)O12 cuboctahedra,  a faceface with one Sc(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, and faces with three equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 1°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one La(2), two equivalent La(1), one Sc(1), and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one La(1), one La(3), two equivalent La(2), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_La7ScAl8O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.571
_cell_length_b   7.571
_cell_length_c   7.571
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   433.928
_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
  La  La0  1  0.000  0.000  0.500  1.0
  La  La1  1  0.000  0.500  0.000  1.0
  La  La2  1  0.000  0.500  0.500  1.0
  La  La3  1  0.500  0.000  0.000  1.0
  La  La4  1  0.500  0.000  0.500  1.0
  La  La5  1  0.500  0.500  0.000  1.0
  La  La6  1  0.500  0.500  0.500  1.0
  Sc  Sc7  1  0.000  0.000  0.000  1.0
  Al  Al8  1  0.751  0.751  0.751  1.0
  Al  Al9  1  0.751  0.751  0.249  1.0
  Al  Al10  1  0.751  0.249  0.751  1.0
  Al  Al11  1  0.751  0.249  0.249  1.0
  Al  Al12  1  0.249  0.751  0.751  1.0
  Al  Al13  1  0.249  0.751  0.249  1.0
  Al  Al14  1  0.249  0.249  0.751  1.0
  Al  Al15  1  0.249  0.249  0.249  1.0
  O  O16  1  0.752  0.000  0.752  1.0
  O  O17  1  0.752  0.000  0.248  1.0
  O  O18  1  0.750  0.500  0.750  1.0
  O  O19  1  0.750  0.500  0.250  1.0
  O  O20  1  0.248  0.000  0.752  1.0
  O  O21  1  0.248  0.000  0.248  1.0
  O  O22  1  0.250  0.500  0.750  1.0
  O  O23  1  0.250  0.500  0.250  1.0
  O  O24  1  0.752  0.752  0.000  1.0
  O  O25  1  0.750  0.750  0.500  1.0
  O  O26  1  0.752  0.248  0.000  1.0
  O  O27  1  0.750  0.250  0.500  1.0
  O  O28  1  0.248  0.752  0.000  1.0
  O  O29  1  0.250  0.750  0.500  1.0
  O  O30  1  0.248  0.248  0.000  1.0
  O  O31  1  0.250  0.250  0.500  1.0
  O  O32  1  0.000  0.752  0.752  1.0
  O  O33  1  0.000  0.752  0.248  1.0
  O  O34  1  0.000  0.248  0.752  1.0
  O  O35  1  0.000  0.248  0.248  1.0
  O  O36  1  0.500  0.750  0.750  1.0
  O  O37  1  0.500  0.750  0.250  1.0
  O  O38  1  0.500  0.250  0.750  1.0
  O  O39  1  0.500  0.250  0.250  1.0
[/CIF]
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The compound described by La7ScAl8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(3)O12 cuboctahedra, corners with eight equivalent La(1)O12 cuboctahedra, faces with two equivalent Sc(1)O12 cuboctahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. In the second La site, La(2) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with four equivalent Sc(1)O12 cuboctahedra, corners with eight equivalent La(2)O12 cuboctahedra, faces with two equivalent La(3)O12 cuboctahedra, faces with four equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. In the third La site, La(3) is bonded to twelve equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with twelve equivalent La(1)O12 cuboctahedra, faces with six equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. Sc(1) is bonded to twelve equivalent O(1) atoms to form ScO12 cuboctahedra that share corners with twelve equivalent La(2)O12 cuboctahedra, faces with six equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. Al(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent Al(1)O6 octahedra,  a faceface with one La(3)O12 cuboctahedra,  a faceface with one Sc(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, and faces with three equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 1°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one La(2), two equivalent La(1), one Sc(1), and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one La(1), one La(3), two equivalent La(2), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_La7ScAl8O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.571
_cell_length_b   7.571
_cell_length_c   7.571
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   433.928
_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
  La  La0  1  0.000  0.000  0.500  1.0
  La  La1  1  0.000  0.500  0.000  1.0
  La  La2  1  0.000  0.500  0.500  1.0
  La  La3  1  0.500  0.000  0.000  1.0
  La  La4  1  0.500  0.000  0.500  1.0
  La  La5  1  0.500  0.500  0.000  1.0
  La  La6  1  0.500  0.500  0.500  1.0
  Sc  Sc7  1  0.000  0.000  0.000  1.0
  Al  Al8  1  0.751  0.751  0.751  1.0
  Al  Al9  1  0.751  0.751  0.249  1.0
  Al  Al10  1  0.751  0.249  0.751  1.0
  Al  Al11  1  0.751  0.249  0.249  1.0
  Al  Al12  1  0.249  0.751  0.751  1.0
  Al  Al13  1  0.249  0.751  0.249  1.0
  Al  Al14  1  0.249  0.249  0.751  1.0
  Al  Al15  1  0.249  0.249  0.249  1.0
  O  O16  1  0.752  0.000  0.752  1.0
  O  O17  1  0.752  0.000  0.248  1.0
  O  O18  1  0.750  0.500  0.750  1.0
  O  O19  1  0.750  0.500  0.250  1.0
  O  O20  1  0.248  0.000  0.752  1.0
  O  O21  1  0.248  0.000  0.248  1.0
  O  O22  1  0.250  0.500  0.750  1.0
  O  O23  1  0.250  0.500  0.250  1.0
  O  O24  1  0.752  0.752  0.000  1.0
  O  O25  1  0.750  0.750  0.500  1.0
  O  O26  1  0.752  0.248  0.000  1.0
  O  O27  1  0.750  0.250  0.500  1.0
  O  O28  1  0.248  0.752  0.000  1.0
  O  O29  1  0.250  0.750  0.500  1.0
  O  O30  1  0.248  0.248  0.000  1.0
  O  O31  1  0.250  0.250  0.500  1.0
  O  O32  1  0.000  0.752  0.752  1.0
  O  O33  1  0.000  0.752  0.248  1.0
  O  O34  1  0.000  0.248  0.752  1.0
  O  O35  1  0.000  0.248  0.248  1.0
  O  O36  1  0.500  0.750  0.750  1.0
  O  O37  1  0.500  0.750  0.250  1.0
  O  O38  1  0.500  0.250  0.750  1.0
  O  O39  1  0.500  0.250  0.250  1.0
[/CIF]
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