The material structure described by Pt7Zn12 crystallizes in the orthorhombic Pbam space group. There are four inequivalent Pt sites. In the first Pt site, Pt(3) is bonded in a 10-coordinate geometry to two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(4), two equivalent Zn(5), and two equivalent Zn(6) atoms. In the second Pt site, Pt(4) is bonded in a distorted body-centered cubic geometry to four equivalent Zn(1) and four equivalent Zn(3) atoms. In the third Pt site, Pt(1) is bonded in a 10-coordinate geometry to two equivalent Zn(1), two equivalent Zn(4), two equivalent Zn(5), and four equivalent Zn(3) atoms. In the fourth Pt site, Pt(2) is bonded in a 8-coordinate geometry to two equivalent Zn(4), two equivalent Zn(6), and four equivalent Zn(2) atoms. There are seven inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(3), two equivalent Pt(4), one Zn(3), one Zn(4), one Zn(5), and two equivalent Zn(1) atoms. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to two equivalent Pt(3), four equivalent Pt(2), and one Zn(4) atom. In the third Zn site, Zn(3) is bonded in a 11-coordinate geometry to two equivalent Pt(4), four equivalent Pt(1), one Zn(1), one Zn(5), and three equivalent Zn(3) atoms. In the fourth Zn site, Zn(4) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), one Zn(1), one Zn(2), one Zn(5), and two equivalent Zn(4) atoms. In the fifth Zn site, Zn(5) is bonded in a 4-coordinate geometry to two equivalent Pt(1), two equivalent Pt(3), one Zn(1), one Zn(3), and one Zn(4) atom. In the sixth Zn site, Zn(5) is bonded in a 4-coordinate geometry to two equivalent Pt(1), two equivalent Pt(3), one Zn(1), one Zn(3), and one Zn(4) atom. In the seventh Zn site, Zn(6) is bonded in a 4-coordinate geometry to two equivalent Pt(2) and two equivalent Pt(3) atoms. is represented by the CIF file [CIF]
data_Zn12Pt7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.778
_cell_length_b   6.981
_cell_length_c   28.779
_cell_angle_alpha   89.997
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   558.003
_cell_formula_units_Z   2
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
  Zn  Zn0  1  0.500  0.876  0.071  1.0
  Zn  Zn1  1  0.500  0.124  0.929  1.0
  Zn  Zn2  1  0.500  0.376  0.429  1.0
  Zn  Zn3  1  0.500  0.624  0.571  1.0
  Zn  Zn4  1  0.500  0.862  0.216  1.0
  Zn  Zn5  1  0.500  0.138  0.784  1.0
  Zn  Zn6  1  0.500  0.362  0.284  1.0
  Zn  Zn7  1  0.500  0.638  0.716  1.0
  Zn  Zn8  1  0.500  0.817  0.492  1.0
  Zn  Zn9  1  0.500  0.183  0.508  1.0
  Zn  Zn10  1  0.500  0.317  0.008  1.0
  Zn  Zn11  1  0.500  0.683  0.992  1.0
  Zn  Zn12  1  0.500  0.632  0.143  1.0
  Zn  Zn13  1  0.500  0.368  0.857  1.0
  Zn  Zn14  1  0.500  0.746  0.899  1.0
  Zn  Zn15  1  0.500  0.254  0.101  1.0
  Zn  Zn16  1  0.500  0.246  0.601  1.0
  Zn  Zn17  1  0.500  0.754  0.399  1.0
  Zn  Zn18  1  0.500  0.770  0.801  1.0
  Zn  Zn19  1  0.500  0.230  0.199  1.0
  Zn  Zn20  1  0.500  0.269  0.699  1.0
  Zn  Zn21  1  0.500  0.731  0.301  1.0
  Zn  Zn22  1  0.500  0.868  0.643  1.0
  Zn  Zn23  1  0.500  0.132  0.357  1.0
  Pt  Pt24  1  1.000  0.537  0.067  1.0
  Pt  Pt25  1  1.000  0.463  0.933  1.0
  Pt  Pt26  1  1.000  0.037  0.433  1.0
  Pt  Pt27  1  0.000  0.963  0.567  1.0
  Pt  Pt28  1  1.000  0.541  0.219  1.0
  Pt  Pt29  1  0.000  0.459  0.781  1.0
  Pt  Pt30  1  1.000  0.041  0.281  1.0
  Pt  Pt31  1  1.000  0.959  0.719  1.0
  Pt  Pt32  1  0.000  0.496  0.356  1.0
  Pt  Pt33  1  0.000  0.504  0.644  1.0
  Pt  Pt34  1  1.000  0.996  0.144  1.0
  Pt  Pt35  1  0.000  0.004  0.856  1.0
  Pt  Pt36  1  0.000  0.500  0.500  1.0
  Pt  Pt37  1  1.000  0.000  1.000  1.0
[/CIF]
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The material structure described by Pt7Zn12 crystallizes in the orthorhombic Pbam space group. There are four inequivalent Pt sites. In the first Pt site, Pt(3) is bonded in a 10-coordinate geometry to two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(4), two equivalent Zn(5), and two equivalent Zn(6) atoms. In the second Pt site, Pt(4) is bonded in a distorted body-centered cubic geometry to four equivalent Zn(1) and four equivalent Zn(3) atoms. In the third Pt site, Pt(1) is bonded in a 10-coordinate geometry to two equivalent Zn(1), two equivalent Zn(4), two equivalent Zn(5), and four equivalent Zn(3) atoms. In the fourth Pt site, Pt(2) is bonded in a 8-coordinate geometry to two equivalent Zn(4), two equivalent Zn(6), and four equivalent Zn(2) atoms. There are seven inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(3), two equivalent Pt(4), one Zn(3), one Zn(4), one Zn(5), and two equivalent Zn(1) atoms. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to two equivalent Pt(3), four equivalent Pt(2), and one Zn(4) atom. In the third Zn site, Zn(3) is bonded in a 11-coordinate geometry to two equivalent Pt(4), four equivalent Pt(1), one Zn(1), one Zn(5), and three equivalent Zn(3) atoms. In the fourth Zn site, Zn(4) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), one Zn(1), one Zn(2), one Zn(5), and two equivalent Zn(4) atoms. In the fifth Zn site, Zn(5) is bonded in a 4-coordinate geometry to two equivalent Pt(1), two equivalent Pt(3), one Zn(1), one Zn(3), and one Zn(4) atom. In the sixth Zn site, Zn(5) is bonded in a 4-coordinate geometry to two equivalent Pt(1), two equivalent Pt(3), one Zn(1), one Zn(3), and one Zn(4) atom. In the seventh Zn site, Zn(6) is bonded in a 4-coordinate geometry to two equivalent Pt(2) and two equivalent Pt(3) atoms. is represented by the CIF file [CIF]
data_Zn12Pt7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.778
_cell_length_b   6.981
_cell_length_c   28.779
_cell_angle_alpha   89.997
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   558.003
_cell_formula_units_Z   2
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
  Zn  Zn0  1  0.500  0.876  0.071  1.0
  Zn  Zn1  1  0.500  0.124  0.929  1.0
  Zn  Zn2  1  0.500  0.376  0.429  1.0
  Zn  Zn3  1  0.500  0.624  0.571  1.0
  Zn  Zn4  1  0.500  0.862  0.216  1.0
  Zn  Zn5  1  0.500  0.138  0.784  1.0
  Zn  Zn6  1  0.500  0.362  0.284  1.0
  Zn  Zn7  1  0.500  0.638  0.716  1.0
  Zn  Zn8  1  0.500  0.817  0.492  1.0
  Zn  Zn9  1  0.500  0.183  0.508  1.0
  Zn  Zn10  1  0.500  0.317  0.008  1.0
  Zn  Zn11  1  0.500  0.683  0.992  1.0
  Zn  Zn12  1  0.500  0.632  0.143  1.0
  Zn  Zn13  1  0.500  0.368  0.857  1.0
  Zn  Zn14  1  0.500  0.746  0.899  1.0
  Zn  Zn15  1  0.500  0.254  0.101  1.0
  Zn  Zn16  1  0.500  0.246  0.601  1.0
  Zn  Zn17  1  0.500  0.754  0.399  1.0
  Zn  Zn18  1  0.500  0.770  0.801  1.0
  Zn  Zn19  1  0.500  0.230  0.199  1.0
  Zn  Zn20  1  0.500  0.269  0.699  1.0
  Zn  Zn21  1  0.500  0.731  0.301  1.0
  Zn  Zn22  1  0.500  0.868  0.643  1.0
  Zn  Zn23  1  0.500  0.132  0.357  1.0
  Pt  Pt24  1  1.000  0.537  0.067  1.0
  Pt  Pt25  1  1.000  0.463  0.933  1.0
  Pt  Pt26  1  1.000  0.037  0.433  1.0
  Pt  Pt27  1  0.000  0.963  0.567  1.0
  Pt  Pt28  1  1.000  0.541  0.219  1.0
  Pt  Pt29  1  0.000  0.459  0.781  1.0
  Pt  Pt30  1  1.000  0.041  0.281  1.0
  Pt  Pt31  1  1.000  0.959  0.719  1.0
  Pt  Pt32  1  0.000  0.496  0.356  1.0
  Pt  Pt33  1  0.000  0.504  0.644  1.0
  Pt  Pt34  1  1.000  0.996  0.144  1.0
  Pt  Pt35  1  0.000  0.004  0.856  1.0
  Pt  Pt36  1  0.000  0.500  0.500  1.0
  Pt  Pt37  1  1.000  0.000  1.000  1.0
[/CIF]
.