The crystal structure described by Ca2Eu(CuO3)2 crystallizes in the monoclinic Cc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(3), one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms. Eu(1) is bonded in a 8-coordinate geometry to one O(4), one O(5), two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), one O(4), and one O(5) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(2), two equivalent Eu(1), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OCa2Eu2Cu trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ca(2), two equivalent Eu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing OCa2Eu2Cu trigonal bipyramids. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one Cu(1), and one Cu(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Ca(1), one Eu(1), one Cu(1), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Eu(1), and one Cu(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Ca(2), two equivalent Ca(1), two equivalent Eu(1), and one Cu(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2Eu(CuO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.224
_cell_length_b   8.224
_cell_length_c   6.327
_cell_angle_alpha   74.435
_cell_angle_beta   74.435
_cell_angle_gamma   44.067
_symmetry_Int_Tables_number   1
_cell_volume   284.861
_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  0.046  0.959  0.250  1.0
  Ca  Ca1  1  0.959  0.046  0.750  1.0
  Ca  Ca2  1  0.011  0.390  0.277  1.0
  Ca  Ca3  1  0.390  0.011  0.777  1.0
  Eu  Eu4  1  0.988  0.605  0.726  1.0
  Eu  Eu5  1  0.605  0.988  0.226  1.0
  Cu  Cu6  1  0.675  0.492  0.007  1.0
  Cu  Cu7  1  0.492  0.675  0.507  1.0
  Cu  Cu8  1  0.323  0.510  0.994  1.0
  Cu  Cu9  1  0.510  0.323  0.494  1.0
  O  O10  1  0.684  0.711  0.025  1.0
  O  O11  1  0.711  0.684  0.525  1.0
  O  O12  1  0.310  0.293  0.975  1.0
  O  O13  1  0.293  0.310  0.475  1.0
  O  O14  1  0.348  0.728  0.976  1.0
  O  O15  1  0.728  0.348  0.476  1.0
  O  O16  1  0.652  0.272  0.025  1.0
  O  O17  1  0.272  0.652  0.525  1.0
  O  O18  1  0.005  0.243  0.975  1.0
  O  O19  1  0.243  0.005  0.475  1.0
  O  O20  1  0.993  0.762  0.021  1.0
  O  O21  1  0.762  0.993  0.521  1.0
[/CIF]
.
The crystal structure described by Ca2Eu(CuO3)2 crystallizes in the monoclinic Cc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(3), one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms. Eu(1) is bonded in a 8-coordinate geometry to one O(4), one O(5), two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), one O(4), and one O(5) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(2), two equivalent Eu(1), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OCa2Eu2Cu trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ca(2), two equivalent Eu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing OCa2Eu2Cu trigonal bipyramids. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), one Cu(1), and one Cu(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Ca(1), one Eu(1), one Cu(1), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Eu(1), and one Cu(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Ca(2), two equivalent Ca(1), two equivalent Eu(1), and one Cu(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2Eu(CuO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.224
_cell_length_b   8.224
_cell_length_c   6.327
_cell_angle_alpha   74.435
_cell_angle_beta   74.435
_cell_angle_gamma   44.067
_symmetry_Int_Tables_number   1
_cell_volume   284.861
_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  0.046  0.959  0.250  1.0
  Ca  Ca1  1  0.959  0.046  0.750  1.0
  Ca  Ca2  1  0.011  0.390  0.277  1.0
  Ca  Ca3  1  0.390  0.011  0.777  1.0
  Eu  Eu4  1  0.988  0.605  0.726  1.0
  Eu  Eu5  1  0.605  0.988  0.226  1.0
  Cu  Cu6  1  0.675  0.492  0.007  1.0
  Cu  Cu7  1  0.492  0.675  0.507  1.0
  Cu  Cu8  1  0.323  0.510  0.994  1.0
  Cu  Cu9  1  0.510  0.323  0.494  1.0
  O  O10  1  0.684  0.711  0.025  1.0
  O  O11  1  0.711  0.684  0.525  1.0
  O  O12  1  0.310  0.293  0.975  1.0
  O  O13  1  0.293  0.310  0.475  1.0
  O  O14  1  0.348  0.728  0.976  1.0
  O  O15  1  0.728  0.348  0.476  1.0
  O  O16  1  0.652  0.272  0.025  1.0
  O  O17  1  0.272  0.652  0.525  1.0
  O  O18  1  0.005  0.243  0.975  1.0
  O  O19  1  0.243  0.005  0.475  1.0
  O  O20  1  0.993  0.762  0.021  1.0
  O  O21  1  0.762  0.993  0.521  1.0
[/CIF]
.