The material described by Eu2Sc2O5 crystallizes in the orthorhombic Ima2 space group. Eu(1) is bonded in a 8-coordinate geometry to one O(3), three equivalent O(2), and four equivalent O(1) atoms. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form ScO6 octahedra that share corners with four equivalent Sc(1)O6 octahedra and corners with two equivalent Sc(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 11°. In the second Sc site, Sc(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form ScO4 tetrahedra that share corners with two equivalent Sc(1)O6 octahedra and corners with two equivalent Sc(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 39°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and two equivalent Sc(1) atoms to form distorted OEu4Sc2 octahedra that share corners with two equivalent O(1)Eu4Sc2 octahedra, corners with four equivalent O(3)Eu2Sc2 tetrahedra, edges with two equivalent O(1)Eu4Sc2 octahedra, and faces with four equivalent O(1)Eu4Sc2 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Eu(1), one Sc(1), and one Sc(2) atom. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent Sc(2) atoms to form distorted OEu2Sc2 tetrahedra that share corners with eight equivalent O(1)Eu4Sc2 octahedra and corners with two equivalent O(3)Eu2Sc2 tetrahedra. The corner-sharing octahedral tilt angles range from 21-82°. is represented by the CIF card [CIF]
data_Eu2Sc2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.848
_cell_length_b   8.848
_cell_length_c   8.848
_cell_angle_alpha   142.011
_cell_angle_beta   140.452
_cell_angle_gamma   55.998
_symmetry_Int_Tables_number   1
_cell_volume   269.371
_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
  Eu  Eu0  1  0.135  0.612  0.533  1.0
  Eu  Eu1  1  0.865  0.398  0.477  1.0
  Eu  Eu2  1  0.579  0.112  0.477  1.0
  Eu  Eu3  1  0.421  0.898  0.533  1.0
  Sc  Sc4  1  0.000  0.998  0.998  1.0
  Sc  Sc5  1  0.500  0.498  0.998  1.0
  Sc  Sc6  1  0.181  0.295  0.976  1.0
  Sc  Sc7  1  0.819  0.795  0.115  1.0
  O  O8  1  0.242  0.739  0.006  1.0
  O  O9  1  0.758  0.765  0.497  1.0
  O  O10  1  0.232  0.239  0.497  1.0
  O  O11  1  0.768  0.265  0.006  1.0
  O  O12  1  0.208  0.115  0.046  1.0
  O  O13  1  0.792  0.838  0.907  1.0
  O  O14  1  0.569  0.615  0.907  1.0
  O  O15  1  0.431  0.338  0.046  1.0
  O  O16  1  0.128  0.647  0.275  1.0
  O  O17  1  0.872  0.147  0.519  1.0
[/CIF]
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The material described by Eu2Sc2O5 crystallizes in the orthorhombic Ima2 space group. Eu(1) is bonded in a 8-coordinate geometry to one O(3), three equivalent O(2), and four equivalent O(1) atoms. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form ScO6 octahedra that share corners with four equivalent Sc(1)O6 octahedra and corners with two equivalent Sc(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 11°. In the second Sc site, Sc(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form ScO4 tetrahedra that share corners with two equivalent Sc(1)O6 octahedra and corners with two equivalent Sc(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 39°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and two equivalent Sc(1) atoms to form distorted OEu4Sc2 octahedra that share corners with two equivalent O(1)Eu4Sc2 octahedra, corners with four equivalent O(3)Eu2Sc2 tetrahedra, edges with two equivalent O(1)Eu4Sc2 octahedra, and faces with four equivalent O(1)Eu4Sc2 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Eu(1), one Sc(1), and one Sc(2) atom. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent Sc(2) atoms to form distorted OEu2Sc2 tetrahedra that share corners with eight equivalent O(1)Eu4Sc2 octahedra and corners with two equivalent O(3)Eu2Sc2 tetrahedra. The corner-sharing octahedral tilt angles range from 21-82°. is represented by the CIF card [CIF]
data_Eu2Sc2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.848
_cell_length_b   8.848
_cell_length_c   8.848
_cell_angle_alpha   142.011
_cell_angle_beta   140.452
_cell_angle_gamma   55.998
_symmetry_Int_Tables_number   1
_cell_volume   269.371
_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
  Eu  Eu0  1  0.135  0.612  0.533  1.0
  Eu  Eu1  1  0.865  0.398  0.477  1.0
  Eu  Eu2  1  0.579  0.112  0.477  1.0
  Eu  Eu3  1  0.421  0.898  0.533  1.0
  Sc  Sc4  1  0.000  0.998  0.998  1.0
  Sc  Sc5  1  0.500  0.498  0.998  1.0
  Sc  Sc6  1  0.181  0.295  0.976  1.0
  Sc  Sc7  1  0.819  0.795  0.115  1.0
  O  O8  1  0.242  0.739  0.006  1.0
  O  O9  1  0.758  0.765  0.497  1.0
  O  O10  1  0.232  0.239  0.497  1.0
  O  O11  1  0.768  0.265  0.006  1.0
  O  O12  1  0.208  0.115  0.046  1.0
  O  O13  1  0.792  0.838  0.907  1.0
  O  O14  1  0.569  0.615  0.907  1.0
  O  O15  1  0.431  0.338  0.046  1.0
  O  O16  1  0.128  0.647  0.275  1.0
  O  O17  1  0.872  0.147  0.519  1.0
[/CIF]
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