The compound described by ErPt5 crystallizes in the hexagonal P6/mmm space group. Er(1) is bonded in a distorted hexagonal planar geometry to six equivalent Pt(2) and twelve equivalent Pt(1) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Er(1), four equivalent Pt(1), and four equivalent Pt(2) atoms to form a mixture of face, corner, and edge-sharing PtEr4Pt8 cuboctahedra. In the second Pt site, Pt(2) is bonded in a 12-coordinate geometry to three equivalent Er(1), three equivalent Pt(2), and six equivalent Pt(1) atoms. is represented by the CIF file [CIF]
data_ErPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.450
_cell_length_b   5.282
_cell_length_c   5.282
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   107.514
_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
  Er  Er0  1  0.000  0.000  0.000  1.0
  Pt  Pt1  1  0.500  0.500  0.500  1.0
  Pt  Pt2  1  0.500  0.000  0.500  1.0
  Pt  Pt3  1  0.500  0.500  0.000  1.0
  Pt  Pt4  1  0.000  0.667  0.333  1.0
  Pt  Pt5  1  0.000  0.333  0.667  1.0
[/CIF]
.
The compound described by ErPt5 crystallizes in the hexagonal P6/mmm space group. Er(1) is bonded in a distorted hexagonal planar geometry to six equivalent Pt(2) and twelve equivalent Pt(1) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Er(1), four equivalent Pt(1), and four equivalent Pt(2) atoms to form a mixture of face, corner, and edge-sharing PtEr4Pt8 cuboctahedra. In the second Pt site, Pt(2) is bonded in a 12-coordinate geometry to three equivalent Er(1), three equivalent Pt(2), and six equivalent Pt(1) atoms. is represented by the CIF file [CIF]
data_ErPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.450
_cell_length_b   5.282
_cell_length_c   5.282
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   107.514
_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
  Er  Er0  1  0.000  0.000  0.000  1.0
  Pt  Pt1  1  0.500  0.500  0.500  1.0
  Pt  Pt2  1  0.500  0.000  0.500  1.0
  Pt  Pt3  1  0.500  0.500  0.000  1.0
  Pt  Pt4  1  0.000  0.667  0.333  1.0
  Pt  Pt5  1  0.000  0.333  0.667  1.0
[/CIF]
.