The material described by ErAsSe crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 9-coordinate geometry to four equivalent As(1) and five equivalent Se(1) atoms. As(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent As(1) atoms. Se(1) is bonded to five equivalent Er(1) atoms to form a mixture of distorted corner and edge-sharing SeEr5 trigonal bipyramids. is represented by the CIF card [CIF]
data_ErAsSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.868
_cell_length_b   3.904
_cell_length_c   17.320
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   261.556
_cell_formula_units_Z   4
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
  Er  Er0  1  0.750  0.239  0.860  1.0
  Er  Er1  1  0.750  0.261  0.360  1.0
  Er  Er2  1  0.250  0.761  0.140  1.0
  Er  Er3  1  0.250  0.739  0.640  1.0
  As  As4  1  0.250  0.213  0.502  1.0
  As  As5  1  0.250  0.287  0.002  1.0
  As  As6  1  0.750  0.787  0.498  1.0
  As  As7  1  0.750  0.713  0.998  1.0
  Se  Se8  1  0.750  0.242  0.688  1.0
  Se  Se9  1  0.750  0.258  0.188  1.0
  Se  Se10  1  0.250  0.758  0.312  1.0
  Se  Se11  1  0.250  0.742  0.812  1.0
[/CIF]
.
The material described by ErAsSe crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 9-coordinate geometry to four equivalent As(1) and five equivalent Se(1) atoms. As(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent As(1) atoms. Se(1) is bonded to five equivalent Er(1) atoms to form a mixture of distorted corner and edge-sharing SeEr5 trigonal bipyramids. is represented by the CIF card [CIF]
data_ErAsSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.868
_cell_length_b   3.904
_cell_length_c   17.320
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   261.556
_cell_formula_units_Z   4
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
  Er  Er0  1  0.750  0.239  0.860  1.0
  Er  Er1  1  0.750  0.261  0.360  1.0
  Er  Er2  1  0.250  0.761  0.140  1.0
  Er  Er3  1  0.250  0.739  0.640  1.0
  As  As4  1  0.250  0.213  0.502  1.0
  As  As5  1  0.250  0.287  0.002  1.0
  As  As6  1  0.750  0.787  0.498  1.0
  As  As7  1  0.750  0.713  0.998  1.0
  Se  Se8  1  0.750  0.242  0.688  1.0
  Se  Se9  1  0.750  0.258  0.188  1.0
  Se  Se10  1  0.250  0.758  0.312  1.0
  Se  Se11  1  0.250  0.742  0.812  1.0
[/CIF]
.