The material structure described by Ba2Eu(CuO2)4 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(4) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(1) and three equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ba(1), one Cu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 12°. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to two equivalent Ba(1) and three equivalent Cu(2) atoms. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. is represented by the CIF card [CIF]
data_Ba2Eu(CuO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.999
_cell_length_b   13.999
_cell_length_c   3.914
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   164.064
_symmetry_Int_Tables_number   1
_cell_volume   210.613
_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
  Ba  Ba0  1  0.635  0.365  0.500  1.0
  Ba  Ba1  1  0.365  0.635  0.500  1.0
  Eu  Eu2  1  0.500  0.500  0.500  1.0
  Cu  Cu3  1  0.937  0.063  0.000  1.0
  Cu  Cu4  1  0.063  0.937  0.000  1.0
  Cu  Cu5  1  0.787  0.213  0.000  1.0
  Cu  Cu6  1  0.213  0.787  0.000  1.0
  O  O7  1  0.854  0.146  0.000  1.0
  O  O8  1  0.146  0.854  0.000  1.0
  O  O9  1  0.554  0.446  0.000  1.0
  O  O10  1  0.446  0.554  0.000  1.0
  O  O11  1  0.719  0.281  0.000  1.0
  O  O12  1  0.281  0.719  0.000  1.0
  O  O13  1  0.945  0.055  0.500  1.0
  O  O14  1  0.055  0.945  0.500  1.0
[/CIF]
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The material structure described by Ba2Eu(CuO2)4 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(4) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(1) and three equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ba(1), one Cu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 12°. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to two equivalent Ba(1) and three equivalent Cu(2) atoms. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. is represented by the CIF card [CIF]
data_Ba2Eu(CuO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.999
_cell_length_b   13.999
_cell_length_c   3.914
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   164.064
_symmetry_Int_Tables_number   1
_cell_volume   210.613
_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
  Ba  Ba0  1  0.635  0.365  0.500  1.0
  Ba  Ba1  1  0.365  0.635  0.500  1.0
  Eu  Eu2  1  0.500  0.500  0.500  1.0
  Cu  Cu3  1  0.937  0.063  0.000  1.0
  Cu  Cu4  1  0.063  0.937  0.000  1.0
  Cu  Cu5  1  0.787  0.213  0.000  1.0
  Cu  Cu6  1  0.213  0.787  0.000  1.0
  O  O7  1  0.854  0.146  0.000  1.0
  O  O8  1  0.146  0.854  0.000  1.0
  O  O9  1  0.554  0.446  0.000  1.0
  O  O10  1  0.446  0.554  0.000  1.0
  O  O11  1  0.719  0.281  0.000  1.0
  O  O12  1  0.281  0.719  0.000  1.0
  O  O13  1  0.945  0.055  0.500  1.0
  O  O14  1  0.055  0.945  0.500  1.0
[/CIF]
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