The material described by ErPtGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 14-coordinate geometry to six equivalent Pt(1), two equivalent Ge(2), and six equivalent Ge(1) atoms. In the second Er site, Er(2) is bonded in a 14-coordinate geometry to four equivalent Pt(1), two equivalent Ge(1), four equivalent Ge(2), and four equivalent Ge(3) atoms. Pt(1) is bonded in a 10-coordinate geometry to two equivalent Er(2), three equivalent Er(1), one Ge(2), one Ge(3), and three equivalent Ge(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Er(2), three equivalent Er(1), three equivalent Pt(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Er(2), two equivalent Pt(1), and one Ge(2) atom. In the third Ge site, Ge(3) is bonded in a 7-coordinate geometry to four equivalent Er(2), two equivalent Pt(1), and one Ge(3) atom. is represented by the CIF file [CIF]
data_ErGe2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.576
_cell_length_b   9.576
_cell_length_c   9.576
_cell_angle_alpha   153.938
_cell_angle_beta   125.607
_cell_angle_gamma   61.279
_symmetry_Int_Tables_number   1
_cell_volume   311.474
_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  0.700  0.200  0.500  1.0
  Er  Er1  1  0.263  0.000  0.263  1.0
  Er  Er2  1  0.300  0.800  0.500  1.0
  Er  Er3  1  0.737  0.000  0.737  1.0
  Ge  Ge4  1  0.051  0.201  0.850  1.0
  Ge  Ge5  1  0.949  0.799  0.150  1.0
  Ge  Ge6  1  0.649  0.799  0.850  1.0
  Ge  Ge7  1  0.351  0.201  0.150  1.0
  Ge  Ge8  1  0.574  0.574  0.000  1.0
  Ge  Ge9  1  0.927  0.427  0.500  1.0
  Ge  Ge10  1  0.073  0.573  0.500  1.0
  Ge  Ge11  1  0.426  0.426  0.000  1.0
  Pt  Pt12  1  0.603  0.353  0.250  1.0
  Pt  Pt13  1  0.397  0.647  0.750  1.0
  Pt  Pt14  1  0.898  0.647  0.250  1.0
  Pt  Pt15  1  0.102  0.353  0.750  1.0
[/CIF]
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The material described by ErPtGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 14-coordinate geometry to six equivalent Pt(1), two equivalent Ge(2), and six equivalent Ge(1) atoms. In the second Er site, Er(2) is bonded in a 14-coordinate geometry to four equivalent Pt(1), two equivalent Ge(1), four equivalent Ge(2), and four equivalent Ge(3) atoms. Pt(1) is bonded in a 10-coordinate geometry to two equivalent Er(2), three equivalent Er(1), one Ge(2), one Ge(3), and three equivalent Ge(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Er(2), three equivalent Er(1), three equivalent Pt(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Er(2), two equivalent Pt(1), and one Ge(2) atom. In the third Ge site, Ge(3) is bonded in a 7-coordinate geometry to four equivalent Er(2), two equivalent Pt(1), and one Ge(3) atom. is represented by the CIF file [CIF]
data_ErGe2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.576
_cell_length_b   9.576
_cell_length_c   9.576
_cell_angle_alpha   153.938
_cell_angle_beta   125.607
_cell_angle_gamma   61.279
_symmetry_Int_Tables_number   1
_cell_volume   311.474
_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  0.700  0.200  0.500  1.0
  Er  Er1  1  0.263  0.000  0.263  1.0
  Er  Er2  1  0.300  0.800  0.500  1.0
  Er  Er3  1  0.737  0.000  0.737  1.0
  Ge  Ge4  1  0.051  0.201  0.850  1.0
  Ge  Ge5  1  0.949  0.799  0.150  1.0
  Ge  Ge6  1  0.649  0.799  0.850  1.0
  Ge  Ge7  1  0.351  0.201  0.150  1.0
  Ge  Ge8  1  0.574  0.574  0.000  1.0
  Ge  Ge9  1  0.927  0.427  0.500  1.0
  Ge  Ge10  1  0.073  0.573  0.500  1.0
  Ge  Ge11  1  0.426  0.426  0.000  1.0
  Pt  Pt12  1  0.603  0.353  0.250  1.0
  Pt  Pt13  1  0.397  0.647  0.750  1.0
  Pt  Pt14  1  0.898  0.647  0.250  1.0
  Pt  Pt15  1  0.102  0.353  0.750  1.0
[/CIF]
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