The compound described by Fe7W6 is Frank-Kasper $\mu$ Phase structured and crystallizes in the trigonal R-3m space group. There are three inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to six equivalent Fe(2) atoms. In the second W site, W(2) is bonded in a 16-coordinate geometry to one W(3), three equivalent W(2), three equivalent Fe(1), and nine equivalent Fe(2) atoms. In the third W site, W(3) is bonded in a 6-coordinate geometry to one W(2) and six equivalent Fe(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to six equivalent W(2) and six equivalent Fe(2) atoms to form FeFe6W6 cuboctahedra that share corners with twelve equivalent Fe(2)Fe5W7 cuboctahedra, edges with six equivalent Fe(1)Fe6W6 cuboctahedra, and faces with eighteen equivalent Fe(2)Fe5W7 cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent W(1), two equivalent W(3), three equivalent W(2), one Fe(1), and four equivalent Fe(2) atoms to form FeFe5W7 cuboctahedra that share corners with two equivalent Fe(1)Fe6W6 cuboctahedra, corners with thirteen equivalent Fe(2)Fe5W7 cuboctahedra, edges with five equivalent Fe(2)Fe5W7 cuboctahedra, faces with three equivalent Fe(1)Fe6W6 cuboctahedra, and faces with ten equivalent Fe(2)Fe5W7 cuboctahedra. is represented by the CIF card [CIF]
data_Fe7W6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.071
_cell_length_b   9.071
_cell_length_c   9.071
_cell_angle_alpha   30.498
_cell_angle_beta   30.498
_cell_angle_gamma   30.498
_symmetry_Int_Tables_number   1
_cell_volume   170.411
_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
  Fe  Fe0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.589  0.091  0.091  1.0
  Fe  Fe2  1  0.091  0.091  0.589  1.0
  Fe  Fe3  1  0.091  0.589  0.091  1.0
  Fe  Fe4  1  0.909  0.411  0.909  1.0
  Fe  Fe5  1  0.411  0.909  0.909  1.0
  Fe  Fe6  1  0.909  0.909  0.411  1.0
  W  W7  1  0.166  0.166  0.166  1.0
  W  W8  1  0.834  0.834  0.834  1.0
  W  W9  1  0.347  0.347  0.347  1.0
  W  W10  1  0.653  0.653  0.653  1.0
  W  W11  1  0.450  0.450  0.450  1.0
  W  W12  1  0.550  0.550  0.550  1.0
[/CIF]
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The compound described by Fe7W6 is Frank-Kasper $\mu$ Phase structured and crystallizes in the trigonal R-3m space group. There are three inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to six equivalent Fe(2) atoms. In the second W site, W(2) is bonded in a 16-coordinate geometry to one W(3), three equivalent W(2), three equivalent Fe(1), and nine equivalent Fe(2) atoms. In the third W site, W(3) is bonded in a 6-coordinate geometry to one W(2) and six equivalent Fe(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to six equivalent W(2) and six equivalent Fe(2) atoms to form FeFe6W6 cuboctahedra that share corners with twelve equivalent Fe(2)Fe5W7 cuboctahedra, edges with six equivalent Fe(1)Fe6W6 cuboctahedra, and faces with eighteen equivalent Fe(2)Fe5W7 cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent W(1), two equivalent W(3), three equivalent W(2), one Fe(1), and four equivalent Fe(2) atoms to form FeFe5W7 cuboctahedra that share corners with two equivalent Fe(1)Fe6W6 cuboctahedra, corners with thirteen equivalent Fe(2)Fe5W7 cuboctahedra, edges with five equivalent Fe(2)Fe5W7 cuboctahedra, faces with three equivalent Fe(1)Fe6W6 cuboctahedra, and faces with ten equivalent Fe(2)Fe5W7 cuboctahedra. is represented by the CIF card [CIF]
data_Fe7W6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.071
_cell_length_b   9.071
_cell_length_c   9.071
_cell_angle_alpha   30.498
_cell_angle_beta   30.498
_cell_angle_gamma   30.498
_symmetry_Int_Tables_number   1
_cell_volume   170.411
_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
  Fe  Fe0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.589  0.091  0.091  1.0
  Fe  Fe2  1  0.091  0.091  0.589  1.0
  Fe  Fe3  1  0.091  0.589  0.091  1.0
  Fe  Fe4  1  0.909  0.411  0.909  1.0
  Fe  Fe5  1  0.411  0.909  0.909  1.0
  Fe  Fe6  1  0.909  0.909  0.411  1.0
  W  W7  1  0.166  0.166  0.166  1.0
  W  W8  1  0.834  0.834  0.834  1.0
  W  W9  1  0.347  0.347  0.347  1.0
  W  W10  1  0.653  0.653  0.653  1.0
  W  W11  1  0.450  0.450  0.450  1.0
  W  W12  1  0.550  0.550  0.550  1.0
[/CIF]
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