The material structure described by Mg14YHf is Magnesium-derived structured and crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Hf(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Hf2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(7)HfMg11 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(7), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Y(1)Hf2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Hf(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), two equivalent Y(1), and two equivalent Hf(1) atoms to form MgY2Hf2Mg8 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Hf2Mg10 cuboctahedra, faces with two equivalent Hf(1)Y2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)YHfMg10 cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, corners with four equivalent Y(1)Hf2Mg10 cuboctahedra, corners with four equivalent Hf(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, and faces with eight equivalent Mg(5)YHfMg10 cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), one Y(1), and one Hf(1) atom to form MgYHfMg10 cuboctahedra that share corners with four equivalent Mg(7)HfMg11 cuboctahedra, corners with four equivalent Mg(6)YMg11 cuboctahedra, corners with ten equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(7)HfMg11 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(6)YMg11 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Y(1)Hf2Mg10 cuboctahedra,  a faceface with one Hf(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, and faces with four equivalent Mg(5)YHfMg10 cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Y(1) atom to form MgYMg11 cuboctahedra that share corners with four equivalent Mg(7)HfMg11 cuboctahedra, corners with six equivalent Mg(6)YMg11 cuboctahedra, corners with eight equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(7)HfMg11 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Y(1)Hf2Mg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent Hf(1)Y2Mg10 cuboctahedra, and faces with four equivalent Mg(5)YHfMg10 cuboctahedra. In the seventh Mg site, Mg(7) is bonded to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one Hf(1) atom to form MgHfMg11 cuboctahedra that share corners with four equivalent Mg(6)YMg11 cuboctahedra, corners with six equivalent Mg(7)HfMg11 cuboctahedra, corners with eight equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(6)YMg11 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Hf(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Y(1)Hf2Mg10 cuboctahedra, and faces with four equivalent Mg(5)YHfMg10 cuboctahedra. Y(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Hf(1) atoms to form YHf2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Y(1)Hf2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Hf(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(7)HfMg11 cuboctahedra. Hf(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Y(1) atoms to form HfY2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Hf(1)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Y(1)Hf2Mg10 cuboctahedra, faces with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra. is represented by the CIF file [CIF]
data_YHfMg14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.505
_cell_length_b   6.426
_cell_length_c   10.338
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.601
_symmetry_Int_Tables_number   1
_cell_volume   375.748
_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
  Y  Y0  1  0.168  0.334  0.125  1.0
  Hf  Hf1  1  0.171  0.836  0.125  1.0
  Mg  Mg2  1  0.166  0.333  0.625  1.0
  Mg  Mg3  1  0.166  0.833  0.625  1.0
  Mg  Mg4  1  0.665  0.332  0.125  1.0
  Mg  Mg5  1  0.667  0.334  0.625  1.0
  Mg  Mg6  1  0.665  0.833  0.125  1.0
  Mg  Mg7  1  0.667  0.833  0.625  1.0
  Mg  Mg8  1  0.333  0.163  0.377  1.0
  Mg  Mg9  1  0.333  0.163  0.873  1.0
  Mg  Mg10  1  0.333  0.670  0.377  1.0
  Mg  Mg11  1  0.333  0.670  0.873  1.0
  Mg  Mg12  1  0.831  0.165  0.378  1.0
  Mg  Mg13  1  0.831  0.165  0.872  1.0
  Mg  Mg14  1  0.835  0.668  0.373  1.0
  Mg  Mg15  1  0.835  0.668  0.877  1.0
[/CIF]
.
The material structure described by Mg14YHf is Magnesium-derived structured and crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Hf(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Hf2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(7)HfMg11 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(7), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Y(1)Hf2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Hf(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), two equivalent Y(1), and two equivalent Hf(1) atoms to form MgY2Hf2Mg8 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Hf2Mg10 cuboctahedra, faces with two equivalent Hf(1)Y2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)YHfMg10 cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, corners with four equivalent Y(1)Hf2Mg10 cuboctahedra, corners with four equivalent Hf(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, and faces with eight equivalent Mg(5)YHfMg10 cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), one Y(1), and one Hf(1) atom to form MgYHfMg10 cuboctahedra that share corners with four equivalent Mg(7)HfMg11 cuboctahedra, corners with four equivalent Mg(6)YMg11 cuboctahedra, corners with ten equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(7)HfMg11 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with two equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(6)YMg11 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Y(1)Hf2Mg10 cuboctahedra,  a faceface with one Hf(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, and faces with four equivalent Mg(5)YHfMg10 cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Y(1) atom to form MgYMg11 cuboctahedra that share corners with four equivalent Mg(7)HfMg11 cuboctahedra, corners with six equivalent Mg(6)YMg11 cuboctahedra, corners with eight equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(7)HfMg11 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Y(1)Hf2Mg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent Hf(1)Y2Mg10 cuboctahedra, and faces with four equivalent Mg(5)YHfMg10 cuboctahedra. In the seventh Mg site, Mg(7) is bonded to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one Hf(1) atom to form MgHfMg11 cuboctahedra that share corners with four equivalent Mg(6)YMg11 cuboctahedra, corners with six equivalent Mg(7)HfMg11 cuboctahedra, corners with eight equivalent Mg(5)YHfMg10 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(6)YMg11 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with four equivalent Mg(5)YHfMg10 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Hf(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Y(1)Hf2Mg10 cuboctahedra, and faces with four equivalent Mg(5)YHfMg10 cuboctahedra. Y(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Hf(1) atoms to form YHf2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Y(1)Hf2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Hf(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Hf(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(7)HfMg11 cuboctahedra. Hf(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Y(1) atoms to form HfY2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Hf(1)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Y(1)Hf2Mg10 cuboctahedra, edges with four equivalent Mg(7)HfMg11 cuboctahedra, edges with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, edges with eight equivalent Mg(5)YHfMg10 cuboctahedra, faces with two equivalent Mg(7)HfMg11 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Y(1)Hf2Mg10 cuboctahedra, faces with four equivalent Mg(3)Y2Hf2Mg8 cuboctahedra, faces with four equivalent Mg(5)YHfMg10 cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra. is represented by the CIF file [CIF]
data_YHfMg14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.505
_cell_length_b   6.426
_cell_length_c   10.338
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.601
_symmetry_Int_Tables_number   1
_cell_volume   375.748
_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
  Y  Y0  1  0.168  0.334  0.125  1.0
  Hf  Hf1  1  0.171  0.836  0.125  1.0
  Mg  Mg2  1  0.166  0.333  0.625  1.0
  Mg  Mg3  1  0.166  0.833  0.625  1.0
  Mg  Mg4  1  0.665  0.332  0.125  1.0
  Mg  Mg5  1  0.667  0.334  0.625  1.0
  Mg  Mg6  1  0.665  0.833  0.125  1.0
  Mg  Mg7  1  0.667  0.833  0.625  1.0
  Mg  Mg8  1  0.333  0.163  0.377  1.0
  Mg  Mg9  1  0.333  0.163  0.873  1.0
  Mg  Mg10  1  0.333  0.670  0.377  1.0
  Mg  Mg11  1  0.333  0.670  0.873  1.0
  Mg  Mg12  1  0.831  0.165  0.378  1.0
  Mg  Mg13  1  0.831  0.165  0.872  1.0
  Mg  Mg14  1  0.835  0.668  0.373  1.0
  Mg  Mg15  1  0.835  0.668  0.877  1.0
[/CIF]
.