The crystal structure described by SrEr2O4 crystallizes in the monoclinic Pm space group. Sr(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(4) atoms. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Er site, Er(2) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted edge-sharing ErO5 square pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Er(2), and two equivalent Er(1) atoms to form corner-sharing OSrEr3 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Er(1) and two equivalent Er(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Er(1) atoms. In the fourth O site, O(4) is bonded in a square co-planar geometry to two equivalent Sr(1) and two equivalent Er(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrEr2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.347
_cell_length_b   5.871
_cell_length_c   7.062
_cell_angle_alpha   83.227
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   137.782
_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
  Sr  Sr0  1  0.000  0.876  0.330  1.0
  Er  Er1  1  0.500  0.339  0.597  1.0
  Er  Er2  1  0.000  0.789  0.877  1.0
  O  O3  1  0.000  0.058  0.644  1.0
  O  O4  1  0.500  0.582  0.792  1.0
  O  O5  1  0.000  0.485  0.431  1.0
  O  O6  1  0.500  0.882  0.082  1.0
[/CIF]
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The crystal structure described by SrEr2O4 crystallizes in the monoclinic Pm space group. Sr(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(4) atoms. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Er site, Er(2) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted edge-sharing ErO5 square pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Er(2), and two equivalent Er(1) atoms to form corner-sharing OSrEr3 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Er(1) and two equivalent Er(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Er(1) atoms. In the fourth O site, O(4) is bonded in a square co-planar geometry to two equivalent Sr(1) and two equivalent Er(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrEr2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.347
_cell_length_b   5.871
_cell_length_c   7.062
_cell_angle_alpha   83.227
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   137.782
_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
  Sr  Sr0  1  0.000  0.876  0.330  1.0
  Er  Er1  1  0.500  0.339  0.597  1.0
  Er  Er2  1  0.000  0.789  0.877  1.0
  O  O3  1  0.000  0.058  0.644  1.0
  O  O4  1  0.500  0.582  0.792  1.0
  O  O5  1  0.000  0.485  0.431  1.0
  O  O6  1  0.500  0.882  0.082  1.0
[/CIF]
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