The structure described by Hf6Co16Si7 crystallizes in the cubic Fm-3m space group. Hf(1) is bonded in a 12-coordinate geometry to four equivalent Co(1), four equivalent Co(2), and four equivalent Si(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), one Si(2), and three equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), and three equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(2) is bonded in a body-centered cubic geometry to eight equivalent Co(1) atoms. In the second Si site, Si(1) is bonded to four equivalent Hf(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of face and corner-sharing SiHf4Co8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf6Co16Si7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.981
_cell_length_b   7.981
_cell_length_c   7.981
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   359.471
_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
  Hf  Hf0  1  0.207  0.793  0.793  1.0
  Hf  Hf1  1  0.793  0.793  0.207  1.0
  Hf  Hf2  1  0.793  0.207  0.207  1.0
  Hf  Hf3  1  0.207  0.207  0.793  1.0
  Hf  Hf4  1  0.793  0.207  0.793  1.0
  Hf  Hf5  1  0.207  0.793  0.207  1.0
  Co  Co6  1  0.620  0.620  0.141  1.0
  Co  Co7  1  0.173  0.482  0.173  1.0
  Co  Co8  1  0.859  0.380  0.380  1.0
  Co  Co9  1  0.518  0.827  0.827  1.0
  Co  Co10  1  0.482  0.173  0.173  1.0
  Co  Co11  1  0.827  0.827  0.518  1.0
  Co  Co12  1  0.173  0.173  0.482  1.0
  Co  Co13  1  0.141  0.620  0.620  1.0
  Co  Co14  1  0.173  0.173  0.173  1.0
  Co  Co15  1  0.380  0.380  0.859  1.0
  Co  Co16  1  0.620  0.620  0.620  1.0
  Co  Co17  1  0.380  0.859  0.380  1.0
  Co  Co18  1  0.380  0.380  0.380  1.0
  Co  Co19  1  0.827  0.827  0.827  1.0
  Co  Co20  1  0.620  0.141  0.620  1.0
  Co  Co21  1  0.827  0.518  0.827  1.0
  Si  Si22  1  0.500  1.000  0.500  1.0
  Si  Si23  1  0.500  0.500  1.000  1.0
  Si  Si24  1  0.500  0.500  0.500  1.0
  Si  Si25  1  1.000  1.000  0.500  1.0
  Si  Si26  1  1.000  0.500  1.000  1.0
  Si  Si27  1  1.000  0.500  0.500  1.0
  Si  Si28  1  0.500  1.000  1.000  1.0
[/CIF]
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The structure described by Hf6Co16Si7 crystallizes in the cubic Fm-3m space group. Hf(1) is bonded in a 12-coordinate geometry to four equivalent Co(1), four equivalent Co(2), and four equivalent Si(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), one Si(2), and three equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), and three equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(2) is bonded in a body-centered cubic geometry to eight equivalent Co(1) atoms. In the second Si site, Si(1) is bonded to four equivalent Hf(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of face and corner-sharing SiHf4Co8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf6Co16Si7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.981
_cell_length_b   7.981
_cell_length_c   7.981
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   359.471
_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
  Hf  Hf0  1  0.207  0.793  0.793  1.0
  Hf  Hf1  1  0.793  0.793  0.207  1.0
  Hf  Hf2  1  0.793  0.207  0.207  1.0
  Hf  Hf3  1  0.207  0.207  0.793  1.0
  Hf  Hf4  1  0.793  0.207  0.793  1.0
  Hf  Hf5  1  0.207  0.793  0.207  1.0
  Co  Co6  1  0.620  0.620  0.141  1.0
  Co  Co7  1  0.173  0.482  0.173  1.0
  Co  Co8  1  0.859  0.380  0.380  1.0
  Co  Co9  1  0.518  0.827  0.827  1.0
  Co  Co10  1  0.482  0.173  0.173  1.0
  Co  Co11  1  0.827  0.827  0.518  1.0
  Co  Co12  1  0.173  0.173  0.482  1.0
  Co  Co13  1  0.141  0.620  0.620  1.0
  Co  Co14  1  0.173  0.173  0.173  1.0
  Co  Co15  1  0.380  0.380  0.859  1.0
  Co  Co16  1  0.620  0.620  0.620  1.0
  Co  Co17  1  0.380  0.859  0.380  1.0
  Co  Co18  1  0.380  0.380  0.380  1.0
  Co  Co19  1  0.827  0.827  0.827  1.0
  Co  Co20  1  0.620  0.141  0.620  1.0
  Co  Co21  1  0.827  0.518  0.827  1.0
  Si  Si22  1  0.500  1.000  0.500  1.0
  Si  Si23  1  0.500  0.500  1.000  1.0
  Si  Si24  1  0.500  0.500  0.500  1.0
  Si  Si25  1  1.000  1.000  0.500  1.0
  Si  Si26  1  1.000  0.500  1.000  1.0
  Si  Si27  1  1.000  0.500  0.500  1.0
  Si  Si28  1  0.500  1.000  1.000  1.0
[/CIF]
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