The crystal structure described by Si7(Ni2Au)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a body-centered cubic geometry to one Au(1), two equivalent Si(2), two equivalent Si(3), and three equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded in a distorted body-centered cubic geometry to two equivalent Au(1), one Si(1), one Si(3), two equivalent Si(2), and two equivalent Si(4) atoms. Au(1) is bonded in a 9-coordinate geometry to one Ni(1), two equivalent Ni(2), one Si(1), two equivalent Si(4), and three equivalent Si(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 5-coordinate geometry to one Ni(2), three equivalent Ni(1), and one Au(1) atom. In the second Si site, Si(2) is bonded to two equivalent Ni(1), two equivalent Ni(2), and one Si(4) atom to form a mixture of distorted edge and corner-sharing SiSiNi4 tetrahedra. In the third Si site, Si(3) is bonded in a 6-coordinate geometry to one Ni(2), two equivalent Ni(1), and three equivalent Au(1) atoms. In the fourth Si site, Si(4) is bonded in a 10-coordinate geometry to four equivalent Ni(2), four equivalent Au(1), and two equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_Si7(Ni2Au)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.653
_cell_length_b   6.653
_cell_length_c   7.943
_cell_angle_alpha   70.838
_cell_angle_beta   70.838
_cell_angle_gamma   32.802
_symmetry_Int_Tables_number   1
_cell_volume   178.960
_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
  Si  Si0  1  0.165  0.165  0.576  1.0
  Si  Si1  1  0.835  0.835  0.424  1.0
  Si  Si2  1  0.495  0.495  0.335  1.0
  Si  Si3  1  0.505  0.505  0.665  1.0
  Si  Si4  1  0.153  0.153  0.242  1.0
  Si  Si5  1  0.847  0.847  0.758  1.0
  Si  Si6  1  0.500  0.500  0.000  1.0
  Ni  Ni7  1  0.345  0.345  0.588  1.0
  Ni  Ni8  1  0.655  0.655  0.412  1.0
  Ni  Ni9  1  0.006  0.006  0.832  1.0
  Ni  Ni10  1  0.994  0.994  0.168  1.0
  Au  Au11  1  0.193  0.193  0.907  1.0
  Au  Au12  1  0.807  0.807  0.093  1.0
[/CIF]
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The crystal structure described by Si7(Ni2Au)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a body-centered cubic geometry to one Au(1), two equivalent Si(2), two equivalent Si(3), and three equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded in a distorted body-centered cubic geometry to two equivalent Au(1), one Si(1), one Si(3), two equivalent Si(2), and two equivalent Si(4) atoms. Au(1) is bonded in a 9-coordinate geometry to one Ni(1), two equivalent Ni(2), one Si(1), two equivalent Si(4), and three equivalent Si(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 5-coordinate geometry to one Ni(2), three equivalent Ni(1), and one Au(1) atom. In the second Si site, Si(2) is bonded to two equivalent Ni(1), two equivalent Ni(2), and one Si(4) atom to form a mixture of distorted edge and corner-sharing SiSiNi4 tetrahedra. In the third Si site, Si(3) is bonded in a 6-coordinate geometry to one Ni(2), two equivalent Ni(1), and three equivalent Au(1) atoms. In the fourth Si site, Si(4) is bonded in a 10-coordinate geometry to four equivalent Ni(2), four equivalent Au(1), and two equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_Si7(Ni2Au)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.653
_cell_length_b   6.653
_cell_length_c   7.943
_cell_angle_alpha   70.838
_cell_angle_beta   70.838
_cell_angle_gamma   32.802
_symmetry_Int_Tables_number   1
_cell_volume   178.960
_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
  Si  Si0  1  0.165  0.165  0.576  1.0
  Si  Si1  1  0.835  0.835  0.424  1.0
  Si  Si2  1  0.495  0.495  0.335  1.0
  Si  Si3  1  0.505  0.505  0.665  1.0
  Si  Si4  1  0.153  0.153  0.242  1.0
  Si  Si5  1  0.847  0.847  0.758  1.0
  Si  Si6  1  0.500  0.500  0.000  1.0
  Ni  Ni7  1  0.345  0.345  0.588  1.0
  Ni  Ni8  1  0.655  0.655  0.412  1.0
  Ni  Ni9  1  0.006  0.006  0.832  1.0
  Ni  Ni10  1  0.994  0.994  0.168  1.0
  Au  Au11  1  0.193  0.193  0.907  1.0
  Au  Au12  1  0.807  0.807  0.093  1.0
[/CIF]
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