The material described by CaEu2O3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. Ca(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Eu(1)O6 octahedra, corners with two equivalent Eu(2)O6 octahedra, edges with two equivalent Ca(1)O6 octahedra, edges with five equivalent Eu(1)O6 octahedra, and edges with five equivalent Eu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form EuO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Eu(1)O6 octahedra, corners with two equivalent Eu(2)O6 octahedra, edges with two equivalent Eu(1)O6 octahedra, edges with five equivalent Ca(1)O6 octahedra, and edges with five equivalent Eu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second Eu site, Eu(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form EuO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Eu(1)O6 octahedra, corners with two equivalent Eu(2)O6 octahedra, edges with two equivalent Eu(2)O6 octahedra, edges with five equivalent Ca(1)O6 octahedra, and edges with five equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1), two equivalent Eu(1), and two equivalent Eu(2) atoms to form a mixture of corner and edge-sharing OCa2Eu4 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the second O site, O(2) is bonded to two equivalent Ca(1), two equivalent Eu(1), and two equivalent Eu(2) atoms to form a mixture of corner and edge-sharing OCa2Eu4 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. is represented by the CIF file [CIF]
data_CaEu2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.162
_cell_length_b   6.162
_cell_length_c   6.122
_cell_angle_alpha   80.548
_cell_angle_beta   80.548
_cell_angle_gamma   120.243
_symmetry_Int_Tables_number   1
_cell_volume   189.588
_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  0.082  0.918  0.250  1.0
  Ca  Ca1  1  0.918  0.082  0.750  1.0
  Eu  Eu2  1  0.751  0.249  0.250  1.0
  Eu  Eu3  1  0.417  0.583  0.250  1.0
  Eu  Eu4  1  0.249  0.751  0.750  1.0
  Eu  Eu5  1  0.583  0.417  0.750  1.0
  O  O6  1  0.840  0.679  0.000  1.0
  O  O7  1  0.679  0.840  0.500  1.0
  O  O8  1  0.000  0.500  0.500  1.0
  O  O9  1  0.321  0.160  0.500  1.0
  O  O10  1  0.500  0.000  0.000  1.0
  O  O11  1  0.160  0.321  1.000  1.0
[/CIF]
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The material described by CaEu2O3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. Ca(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Eu(1)O6 octahedra, corners with two equivalent Eu(2)O6 octahedra, edges with two equivalent Ca(1)O6 octahedra, edges with five equivalent Eu(1)O6 octahedra, and edges with five equivalent Eu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form EuO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Eu(1)O6 octahedra, corners with two equivalent Eu(2)O6 octahedra, edges with two equivalent Eu(1)O6 octahedra, edges with five equivalent Ca(1)O6 octahedra, and edges with five equivalent Eu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second Eu site, Eu(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form EuO6 octahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Eu(1)O6 octahedra, corners with two equivalent Eu(2)O6 octahedra, edges with two equivalent Eu(2)O6 octahedra, edges with five equivalent Ca(1)O6 octahedra, and edges with five equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1), two equivalent Eu(1), and two equivalent Eu(2) atoms to form a mixture of corner and edge-sharing OCa2Eu4 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the second O site, O(2) is bonded to two equivalent Ca(1), two equivalent Eu(1), and two equivalent Eu(2) atoms to form a mixture of corner and edge-sharing OCa2Eu4 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. is represented by the CIF file [CIF]
data_CaEu2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.162
_cell_length_b   6.162
_cell_length_c   6.122
_cell_angle_alpha   80.548
_cell_angle_beta   80.548
_cell_angle_gamma   120.243
_symmetry_Int_Tables_number   1
_cell_volume   189.588
_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  0.082  0.918  0.250  1.0
  Ca  Ca1  1  0.918  0.082  0.750  1.0
  Eu  Eu2  1  0.751  0.249  0.250  1.0
  Eu  Eu3  1  0.417  0.583  0.250  1.0
  Eu  Eu4  1  0.249  0.751  0.750  1.0
  Eu  Eu5  1  0.583  0.417  0.750  1.0
  O  O6  1  0.840  0.679  0.000  1.0
  O  O7  1  0.679  0.840  0.500  1.0
  O  O8  1  0.000  0.500  0.500  1.0
  O  O9  1  0.321  0.160  0.500  1.0
  O  O10  1  0.500  0.000  0.000  1.0
  O  O11  1  0.160  0.321  1.000  1.0
[/CIF]
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