The compound described by KEu(NiO3)4 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Eu(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(5) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent Eu(1)O12 cuboctahedra and faces with eight equivalent Ni(1)O6 octahedra. Ni(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ni(1)O6 octahedra and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-23°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one Eu(1), and two equivalent Ni(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Eu(1) and two equivalent Ni(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one Eu(1), and two equivalent Ni(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Ni(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Eu(1) and two equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_KEu(NiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.398
_cell_length_b   5.398
_cell_length_c   7.726
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.668
_symmetry_Int_Tables_number   1
_cell_volume   225.135
_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
  K  K0  1  0.011  0.011  0.000  1.0
  Eu  Eu1  1  0.491  0.491  0.500  1.0
  Ni  Ni2  1  0.502  0.997  0.752  1.0
  Ni  Ni3  1  0.502  0.997  0.248  1.0
  Ni  Ni4  1  0.997  0.502  0.248  1.0
  Ni  Ni5  1  0.997  0.502  0.752  1.0
  O  O6  1  0.776  0.224  0.747  1.0
  O  O7  1  0.224  0.776  0.747  1.0
  O  O8  1  0.224  0.776  0.253  1.0
  O  O9  1  0.776  0.224  0.253  1.0
  O  O10  1  0.716  0.716  0.716  1.0
  O  O11  1  0.284  0.284  0.777  1.0
  O  O12  1  0.284  0.284  0.223  1.0
  O  O13  1  0.716  0.716  0.284  1.0
  O  O14  1  0.527  0.968  0.000  1.0
  O  O15  1  0.472  0.035  0.500  1.0
  O  O16  1  0.968  0.527  0.000  1.0
  O  O17  1  0.035  0.472  0.500  1.0
[/CIF]
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The compound described by KEu(NiO3)4 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Eu(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(5) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent Eu(1)O12 cuboctahedra and faces with eight equivalent Ni(1)O6 octahedra. Ni(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ni(1)O6 octahedra and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-23°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(1), one Eu(1), and two equivalent Ni(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Eu(1) and two equivalent Ni(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one Eu(1), and two equivalent Ni(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Ni(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Eu(1) and two equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_KEu(NiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.398
_cell_length_b   5.398
_cell_length_c   7.726
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.668
_symmetry_Int_Tables_number   1
_cell_volume   225.135
_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
  K  K0  1  0.011  0.011  0.000  1.0
  Eu  Eu1  1  0.491  0.491  0.500  1.0
  Ni  Ni2  1  0.502  0.997  0.752  1.0
  Ni  Ni3  1  0.502  0.997  0.248  1.0
  Ni  Ni4  1  0.997  0.502  0.248  1.0
  Ni  Ni5  1  0.997  0.502  0.752  1.0
  O  O6  1  0.776  0.224  0.747  1.0
  O  O7  1  0.224  0.776  0.747  1.0
  O  O8  1  0.224  0.776  0.253  1.0
  O  O9  1  0.776  0.224  0.253  1.0
  O  O10  1  0.716  0.716  0.716  1.0
  O  O11  1  0.284  0.284  0.777  1.0
  O  O12  1  0.284  0.284  0.223  1.0
  O  O13  1  0.716  0.716  0.284  1.0
  O  O14  1  0.527  0.968  0.000  1.0
  O  O15  1  0.472  0.035  0.500  1.0
  O  O16  1  0.968  0.527  0.000  1.0
  O  O17  1  0.035  0.472  0.500  1.0
[/CIF]
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