The structure described by Eu2AlNO3 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 9-coordinate geometry to four equivalent N(1), one O(2), and four equivalent O(1) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one N(1), four equivalent O(1), and four equivalent O(2) atoms. Al(1) is bonded to one N(1), one O(2), and four equivalent O(1) atoms to form corner-sharing AlNO5 octahedra. The corner-sharing octahedral tilt angles are 1°. N(1) is bonded to one Eu(2), four equivalent Eu(1), and one Al(1) atom to form NEu5Al octahedra that share  a cornercorner with one O(2)Eu5Al octahedra, corners with four equivalent N(1)Eu5Al octahedra, corners with twelve equivalent O(1)Eu4Al2 octahedra, edges with four equivalent N(1)Eu5Al octahedra, edges with four equivalent O(2)Eu5Al octahedra, and faces with four equivalent O(1)Eu4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Al(1) atoms to form distorted OEu4Al2 octahedra that share corners with two equivalent O(1)Eu4Al2 octahedra, corners with six equivalent N(1)Eu5Al octahedra, corners with six equivalent O(2)Eu5Al octahedra, edges with two equivalent O(1)Eu4Al2 octahedra, faces with two equivalent N(1)Eu5Al octahedra, faces with two equivalent O(2)Eu5Al octahedra, and faces with four equivalent O(1)Eu4Al2 octahedra. The corner-sharing octahedral tilt angles range from 1-55°. In the second O site, O(2) is bonded to one Eu(1), four equivalent Eu(2), and one Al(1) atom to form distorted OEu5Al octahedra that share  a cornercorner with one N(1)Eu5Al octahedra, corners with four equivalent O(2)Eu5Al octahedra, corners with twelve equivalent O(1)Eu4Al2 octahedra, edges with four equivalent N(1)Eu5Al octahedra, edges with four equivalent O(2)Eu5Al octahedra, and faces with four equivalent O(1)Eu4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. is represented by the CIF file [CIF]
data_Eu2AlNO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.761
_cell_length_b   6.761
_cell_length_c   6.761
_cell_angle_alpha   147.920
_cell_angle_beta   147.920
_cell_angle_gamma   46.004
_symmetry_Int_Tables_number   1
_cell_volume   86.870
_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
  Eu  Eu0  1  0.520  0.520  0.000  1.0
  Eu  Eu1  1  0.807  0.807  0.000  1.0
  Al  Al2  1  0.166  0.166  0.000  1.0
  N  N3  1  0.997  0.997  0.000  1.0
  O  O4  1  0.667  0.167  0.500  1.0
  O  O5  1  0.167  0.667  0.500  1.0
  O  O6  1  0.329  0.329  0.000  1.0
[/CIF]
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The structure described by Eu2AlNO3 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 9-coordinate geometry to four equivalent N(1), one O(2), and four equivalent O(1) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one N(1), four equivalent O(1), and four equivalent O(2) atoms. Al(1) is bonded to one N(1), one O(2), and four equivalent O(1) atoms to form corner-sharing AlNO5 octahedra. The corner-sharing octahedral tilt angles are 1°. N(1) is bonded to one Eu(2), four equivalent Eu(1), and one Al(1) atom to form NEu5Al octahedra that share  a cornercorner with one O(2)Eu5Al octahedra, corners with four equivalent N(1)Eu5Al octahedra, corners with twelve equivalent O(1)Eu4Al2 octahedra, edges with four equivalent N(1)Eu5Al octahedra, edges with four equivalent O(2)Eu5Al octahedra, and faces with four equivalent O(1)Eu4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Al(1) atoms to form distorted OEu4Al2 octahedra that share corners with two equivalent O(1)Eu4Al2 octahedra, corners with six equivalent N(1)Eu5Al octahedra, corners with six equivalent O(2)Eu5Al octahedra, edges with two equivalent O(1)Eu4Al2 octahedra, faces with two equivalent N(1)Eu5Al octahedra, faces with two equivalent O(2)Eu5Al octahedra, and faces with four equivalent O(1)Eu4Al2 octahedra. The corner-sharing octahedral tilt angles range from 1-55°. In the second O site, O(2) is bonded to one Eu(1), four equivalent Eu(2), and one Al(1) atom to form distorted OEu5Al octahedra that share  a cornercorner with one N(1)Eu5Al octahedra, corners with four equivalent O(2)Eu5Al octahedra, corners with twelve equivalent O(1)Eu4Al2 octahedra, edges with four equivalent N(1)Eu5Al octahedra, edges with four equivalent O(2)Eu5Al octahedra, and faces with four equivalent O(1)Eu4Al2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. is represented by the CIF file [CIF]
data_Eu2AlNO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.761
_cell_length_b   6.761
_cell_length_c   6.761
_cell_angle_alpha   147.920
_cell_angle_beta   147.920
_cell_angle_gamma   46.004
_symmetry_Int_Tables_number   1
_cell_volume   86.870
_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
  Eu  Eu0  1  0.520  0.520  0.000  1.0
  Eu  Eu1  1  0.807  0.807  0.000  1.0
  Al  Al2  1  0.166  0.166  0.000  1.0
  N  N3  1  0.997  0.997  0.000  1.0
  O  O4  1  0.667  0.167  0.500  1.0
  O  O5  1  0.167  0.667  0.500  1.0
  O  O6  1  0.329  0.329  0.000  1.0
[/CIF]
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