The structure described by MgYb7Pt4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one Pt(1), one Pt(2), and two equivalent Pt(4) atoms to form distorted MgPt4 tetrahedra that share corners with two equivalent Mg(1)Pt4 tetrahedra, corners with two equivalent Yb(5)Pt4 tetrahedra, corners with four equivalent Yb(7)Pt4 tetrahedra, and edges with two equivalent Yb(6)Pt4 tetrahedra. There are seven inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 5-coordinate geometry to one Pt(1), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the second Yb site, Yb(2) is bonded in a 5-coordinate geometry to one Pt(2), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the third Yb site, Yb(3) is bonded in a 5-coordinate geometry to one Pt(3), two equivalent Pt(1), and two equivalent Pt(2) atoms. In the fourth Yb site, Yb(4) is bonded in a 5-coordinate geometry to one Pt(4), two equivalent Pt(1), and two equivalent Pt(2) atoms. In the fifth Yb site, Yb(5) is bonded to one Pt(1), one Pt(2), and two equivalent Pt(3) atoms to form YbPt4 tetrahedra that share corners with two equivalent Mg(1)Pt4 tetrahedra, corners with two equivalent Yb(5)Pt4 tetrahedra, corners with four equivalent Yb(6)Pt4 tetrahedra, and edges with two equivalent Yb(7)Pt4 tetrahedra. In the sixth Yb site, Yb(6) is bonded to one Pt(3), one Pt(4), and two equivalent Pt(2) atoms to form distorted YbPt4 tetrahedra that share corners with two equivalent Yb(6)Pt4 tetrahedra, corners with two equivalent Yb(7)Pt4 tetrahedra, corners with four equivalent Yb(5)Pt4 tetrahedra, and edges with two equivalent Mg(1)Pt4 tetrahedra. In the seventh Yb site, Yb(7) is bonded to one Pt(3), one Pt(4), and two equivalent Pt(1) atoms to form YbPt4 tetrahedra that share corners with two equivalent Yb(6)Pt4 tetrahedra, corners with two equivalent Yb(7)Pt4 tetrahedra, corners with four equivalent Mg(1)Pt4 tetrahedra, and edges with two equivalent Yb(5)Pt4 tetrahedra. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Mg(1), one Yb(1), one Yb(5), two equivalent Yb(3), two equivalent Yb(4), and two equivalent Yb(7) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Mg(1), one Yb(2), one Yb(5), two equivalent Yb(3), two equivalent Yb(4), and two equivalent Yb(6) atoms. In the third Pt site, Pt(3) is bonded in a 9-coordinate geometry to one Yb(3), one Yb(6), one Yb(7), two equivalent Yb(1), two equivalent Yb(2), and two equivalent Yb(5) atoms. In the fourth Pt site, Pt(4) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Yb(4), one Yb(6), one Yb(7), two equivalent Yb(1), and two equivalent Yb(2) atoms. is represented by the CIF file [CIF]
data_Yb7MgPt4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.338
_cell_length_b   7.331
_cell_length_c   8.678
_cell_angle_alpha   89.571
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   275.946
_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
  Yb  Yb0  1  0.500  0.527  0.828  1.0
  Yb  Yb1  1  0.500  0.023  0.660  1.0
  Yb  Yb2  1  0.000  0.476  0.181  1.0
  Yb  Yb3  1  0.000  0.962  0.331  1.0
  Yb  Yb4  1  0.500  0.145  0.069  1.0
  Yb  Yb5  1  0.000  0.360  0.566  1.0
  Yb  Yb6  1  0.000  0.852  0.929  1.0
  Mg  Mg7  1  0.500  0.647  0.438  1.0
  Pt  Pt8  1  0.500  0.753  0.127  1.0
  Pt  Pt9  1  0.500  0.266  0.378  1.0
  Pt  Pt10  1  0.000  0.246  0.881  1.0
  Pt  Pt11  1  0.000  0.743  0.613  1.0
[/CIF]
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The structure described by MgYb7Pt4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one Pt(1), one Pt(2), and two equivalent Pt(4) atoms to form distorted MgPt4 tetrahedra that share corners with two equivalent Mg(1)Pt4 tetrahedra, corners with two equivalent Yb(5)Pt4 tetrahedra, corners with four equivalent Yb(7)Pt4 tetrahedra, and edges with two equivalent Yb(6)Pt4 tetrahedra. There are seven inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 5-coordinate geometry to one Pt(1), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the second Yb site, Yb(2) is bonded in a 5-coordinate geometry to one Pt(2), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the third Yb site, Yb(3) is bonded in a 5-coordinate geometry to one Pt(3), two equivalent Pt(1), and two equivalent Pt(2) atoms. In the fourth Yb site, Yb(4) is bonded in a 5-coordinate geometry to one Pt(4), two equivalent Pt(1), and two equivalent Pt(2) atoms. In the fifth Yb site, Yb(5) is bonded to one Pt(1), one Pt(2), and two equivalent Pt(3) atoms to form YbPt4 tetrahedra that share corners with two equivalent Mg(1)Pt4 tetrahedra, corners with two equivalent Yb(5)Pt4 tetrahedra, corners with four equivalent Yb(6)Pt4 tetrahedra, and edges with two equivalent Yb(7)Pt4 tetrahedra. In the sixth Yb site, Yb(6) is bonded to one Pt(3), one Pt(4), and two equivalent Pt(2) atoms to form distorted YbPt4 tetrahedra that share corners with two equivalent Yb(6)Pt4 tetrahedra, corners with two equivalent Yb(7)Pt4 tetrahedra, corners with four equivalent Yb(5)Pt4 tetrahedra, and edges with two equivalent Mg(1)Pt4 tetrahedra. In the seventh Yb site, Yb(7) is bonded to one Pt(3), one Pt(4), and two equivalent Pt(1) atoms to form YbPt4 tetrahedra that share corners with two equivalent Yb(6)Pt4 tetrahedra, corners with two equivalent Yb(7)Pt4 tetrahedra, corners with four equivalent Mg(1)Pt4 tetrahedra, and edges with two equivalent Yb(5)Pt4 tetrahedra. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Mg(1), one Yb(1), one Yb(5), two equivalent Yb(3), two equivalent Yb(4), and two equivalent Yb(7) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Mg(1), one Yb(2), one Yb(5), two equivalent Yb(3), two equivalent Yb(4), and two equivalent Yb(6) atoms. In the third Pt site, Pt(3) is bonded in a 9-coordinate geometry to one Yb(3), one Yb(6), one Yb(7), two equivalent Yb(1), two equivalent Yb(2), and two equivalent Yb(5) atoms. In the fourth Pt site, Pt(4) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Yb(4), one Yb(6), one Yb(7), two equivalent Yb(1), and two equivalent Yb(2) atoms. is represented by the CIF file [CIF]
data_Yb7MgPt4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.338
_cell_length_b   7.331
_cell_length_c   8.678
_cell_angle_alpha   89.571
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   275.946
_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
  Yb  Yb0  1  0.500  0.527  0.828  1.0
  Yb  Yb1  1  0.500  0.023  0.660  1.0
  Yb  Yb2  1  0.000  0.476  0.181  1.0
  Yb  Yb3  1  0.000  0.962  0.331  1.0
  Yb  Yb4  1  0.500  0.145  0.069  1.0
  Yb  Yb5  1  0.000  0.360  0.566  1.0
  Yb  Yb6  1  0.000  0.852  0.929  1.0
  Mg  Mg7  1  0.500  0.647  0.438  1.0
  Pt  Pt8  1  0.500  0.753  0.127  1.0
  Pt  Pt9  1  0.500  0.266  0.378  1.0
  Pt  Pt10  1  0.000  0.246  0.881  1.0
  Pt  Pt11  1  0.000  0.743  0.613  1.0
[/CIF]
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