The crystal structure described by CaEu2(CuO3)2 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. Eu(1) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(3), and four equivalent O(1) atoms. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OEu4Cu trigonal bipyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Ca(1), one Eu(1), and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Ca(1), two equivalent Eu(1), and one Cu(1) atom. is represented by the CIF file [CIF]
data_CaEu2(CuO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.292
_cell_length_b   8.292
_cell_length_c   6.306
_cell_angle_alpha   75.446
_cell_angle_beta   75.446
_cell_angle_gamma   44.221
_symmetry_Int_Tables_number   1
_cell_volume   291.089
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.948  0.052  0.750  1.0
  Ca  Ca1  1  0.052  0.948  0.250  1.0
  Eu  Eu2  1  0.385  0.009  0.780  1.0
  Eu  Eu3  1  0.615  0.991  0.220  1.0
  Eu  Eu4  1  0.991  0.615  0.720  1.0
  Eu  Eu5  1  0.009  0.385  0.280  1.0
  Cu  Cu6  1  0.322  0.512  0.999  1.0
  Cu  Cu7  1  0.678  0.488  0.001  1.0
  Cu  Cu8  1  0.512  0.322  0.499  1.0
  Cu  Cu9  1  0.488  0.678  0.501  1.0
  O  O10  1  0.293  0.305  0.486  1.0
  O  O11  1  0.648  0.274  0.024  1.0
  O  O12  1  0.707  0.695  0.514  1.0
  O  O13  1  0.231  0.007  0.475  1.0
  O  O14  1  0.769  0.993  0.525  1.0
  O  O15  1  0.993  0.769  0.025  1.0
  O  O16  1  0.352  0.726  0.976  1.0
  O  O17  1  0.726  0.352  0.476  1.0
  O  O18  1  0.007  0.231  0.975  1.0
  O  O19  1  0.274  0.648  0.524  1.0
  O  O20  1  0.695  0.707  0.014  1.0
  O  O21  1  0.305  0.293  0.986  1.0
[/CIF]
.
The crystal structure described by CaEu2(CuO3)2 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. Eu(1) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(3), and four equivalent O(1) atoms. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OEu4Cu trigonal bipyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Ca(1), one Eu(1), and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Ca(1), two equivalent Eu(1), and one Cu(1) atom. is represented by the CIF file [CIF]
data_CaEu2(CuO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.292
_cell_length_b   8.292
_cell_length_c   6.306
_cell_angle_alpha   75.446
_cell_angle_beta   75.446
_cell_angle_gamma   44.221
_symmetry_Int_Tables_number   1
_cell_volume   291.089
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.948  0.052  0.750  1.0
  Ca  Ca1  1  0.052  0.948  0.250  1.0
  Eu  Eu2  1  0.385  0.009  0.780  1.0
  Eu  Eu3  1  0.615  0.991  0.220  1.0
  Eu  Eu4  1  0.991  0.615  0.720  1.0
  Eu  Eu5  1  0.009  0.385  0.280  1.0
  Cu  Cu6  1  0.322  0.512  0.999  1.0
  Cu  Cu7  1  0.678  0.488  0.001  1.0
  Cu  Cu8  1  0.512  0.322  0.499  1.0
  Cu  Cu9  1  0.488  0.678  0.501  1.0
  O  O10  1  0.293  0.305  0.486  1.0
  O  O11  1  0.648  0.274  0.024  1.0
  O  O12  1  0.707  0.695  0.514  1.0
  O  O13  1  0.231  0.007  0.475  1.0
  O  O14  1  0.769  0.993  0.525  1.0
  O  O15  1  0.993  0.769  0.025  1.0
  O  O16  1  0.352  0.726  0.976  1.0
  O  O17  1  0.726  0.352  0.476  1.0
  O  O18  1  0.007  0.231  0.975  1.0
  O  O19  1  0.274  0.648  0.524  1.0
  O  O20  1  0.695  0.707  0.014  1.0
  O  O21  1  0.305  0.293  0.986  1.0
[/CIF]
.