The structure described by SrEuAlO4 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(3) atoms. Eu(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. Al(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), four equivalent Eu(1), and one Al(1) atom to form distorted OSrEu4Al octahedra that share  a cornercorner with one O(2)Sr4EuAl octahedra, corners with four equivalent O(1)SrEu4Al octahedra, corners with twelve equivalent O(3)Sr2Eu2Al2 octahedra, edges with four equivalent O(2)Sr4EuAl octahedra, edges with four equivalent O(1)SrEu4Al octahedra, and faces with four equivalent O(3)Sr2Eu2Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the second O site, O(2) is bonded to four equivalent Sr(1), one Eu(1), and one Al(1) atom to form distorted OSr4EuAl octahedra that share  a cornercorner with one O(1)SrEu4Al octahedra, corners with four equivalent O(2)Sr4EuAl octahedra, corners with twelve equivalent O(3)Sr2Eu2Al2 octahedra, edges with four equivalent O(2)Sr4EuAl octahedra, edges with four equivalent O(1)SrEu4Al octahedra, and faces with four equivalent O(3)Sr2Eu2Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Eu(1), and two equivalent Al(1) atoms to form distorted OSr2Eu2Al2 octahedra that share corners with two equivalent O(3)Sr2Eu2Al2 octahedra, corners with six equivalent O(2)Sr4EuAl octahedra, corners with six equivalent O(1)SrEu4Al octahedra, edges with two equivalent O(3)Sr2Eu2Al2 octahedra, faces with two equivalent O(2)Sr4EuAl octahedra, faces with two equivalent O(1)SrEu4Al octahedra, and faces with four equivalent O(3)Sr2Eu2Al2 octahedra. The corner-sharing octahedral tilt angles range from 5-56°. is represented by the CIF card [CIF]
data_SrEuAlO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.743
_cell_length_b   6.743
_cell_length_c   6.743
_cell_angle_alpha   147.588
_cell_angle_beta   147.588
_cell_angle_gamma   46.494
_symmetry_Int_Tables_number   1
_cell_volume   87.774
_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  0.645  0.645  0.000  1.0
  Eu  Eu1  1  0.360  0.360  0.000  1.0
  Al  Al2  1  0.001  0.001  0.000  1.0
  O  O3  1  0.841  0.841  0.000  1.0
  O  O4  1  0.164  0.164  0.000  1.0
  O  O5  1  0.995  0.495  0.500  1.0
  O  O6  1  0.495  0.995  0.500  1.0
[/CIF]
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The structure described by SrEuAlO4 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(3) atoms. Eu(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. Al(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), four equivalent Eu(1), and one Al(1) atom to form distorted OSrEu4Al octahedra that share  a cornercorner with one O(2)Sr4EuAl octahedra, corners with four equivalent O(1)SrEu4Al octahedra, corners with twelve equivalent O(3)Sr2Eu2Al2 octahedra, edges with four equivalent O(2)Sr4EuAl octahedra, edges with four equivalent O(1)SrEu4Al octahedra, and faces with four equivalent O(3)Sr2Eu2Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the second O site, O(2) is bonded to four equivalent Sr(1), one Eu(1), and one Al(1) atom to form distorted OSr4EuAl octahedra that share  a cornercorner with one O(1)SrEu4Al octahedra, corners with four equivalent O(2)Sr4EuAl octahedra, corners with twelve equivalent O(3)Sr2Eu2Al2 octahedra, edges with four equivalent O(2)Sr4EuAl octahedra, edges with four equivalent O(1)SrEu4Al octahedra, and faces with four equivalent O(3)Sr2Eu2Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Eu(1), and two equivalent Al(1) atoms to form distorted OSr2Eu2Al2 octahedra that share corners with two equivalent O(3)Sr2Eu2Al2 octahedra, corners with six equivalent O(2)Sr4EuAl octahedra, corners with six equivalent O(1)SrEu4Al octahedra, edges with two equivalent O(3)Sr2Eu2Al2 octahedra, faces with two equivalent O(2)Sr4EuAl octahedra, faces with two equivalent O(1)SrEu4Al octahedra, and faces with four equivalent O(3)Sr2Eu2Al2 octahedra. The corner-sharing octahedral tilt angles range from 5-56°. is represented by the CIF card [CIF]
data_SrEuAlO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.743
_cell_length_b   6.743
_cell_length_c   6.743
_cell_angle_alpha   147.588
_cell_angle_beta   147.588
_cell_angle_gamma   46.494
_symmetry_Int_Tables_number   1
_cell_volume   87.774
_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  0.645  0.645  0.000  1.0
  Eu  Eu1  1  0.360  0.360  0.000  1.0
  Al  Al2  1  0.001  0.001  0.000  1.0
  O  O3  1  0.841  0.841  0.000  1.0
  O  O4  1  0.164  0.164  0.000  1.0
  O  O5  1  0.995  0.495  0.500  1.0
  O  O6  1  0.495  0.995  0.500  1.0
[/CIF]
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