The crystal structure described by Mg6VCr is beta Cu3Ti-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(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(2)Mg10V2 cuboctahedra; corners with four equivalent V(1)Mg10Cr2 cuboctahedra; corners with ten equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(2)Mg10V2 cuboctahedra; edges with two equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent V(1)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with four equivalent Cr(1)Mg10V2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; and faces with eight Mg(3,3,3)Mg8V2Cr2 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(3,3); and two equivalent V(1) atoms to form MgMg10V2 cuboctahedra that share corners with four equivalent V(1)Mg10Cr2 cuboctahedra; corners with six equivalent Mg(2)Mg10V2 cuboctahedra; corners with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent V(1)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent Cr(1)Mg10V2 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. In the fifth Mg site, Mg(4) is bonded to two equivalent Mg(2); four equivalent Mg(1); four Mg(3,3,3,3); and two equivalent Cr(1) atoms to form MgMg10Cr2 cuboctahedra that share corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with six equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent V(1)Mg10Cr2 cuboctahedra. In the sixth Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. In the seventh Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. V(1) is bonded to two equivalent Mg(2); four equivalent Mg(1); four Mg(3,3); and two equivalent Cr(1) atoms to form VMg10Cr2 cuboctahedra that share corners with four equivalent Mg(2)Mg10V2 cuboctahedra; corners with six equivalent V(1)Mg10Cr2 cuboctahedra; corners with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent Cr(1)Mg10V2 cuboctahedra; edges with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent Mg(4)Mg10Cr2 cuboctahedra. Cr(1) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(3,3,3,3); and two equivalent V(1) atoms to form CrMg10V2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with six equivalent Cr(1)Mg10V2 cuboctahedra; corners with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; edges with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent Mg(2)Mg10V2 cuboctahedra. is represented by the CIF file [CIF]
data_Mg6VCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.996
_cell_length_b   6.171
_cell_length_c   6.171
_cell_angle_alpha   119.715
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   165.217
_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
  Cr  Cr0  1  0.500  0.334  0.666  1.0
  Mg  Mg1  1  0.000  0.655  0.826  1.0
  Mg  Mg2  1  0.000  0.174  0.345  1.0
  Mg  Mg3  1  0.000  0.665  0.335  1.0
  Mg  Mg4  1  0.500  0.846  0.673  1.0
  Mg  Mg5  1  0.500  0.327  0.154  1.0
  Mg  Mg6  1  0.500  0.835  0.165  1.0
  V  V7  1  0.000  0.164  0.836  1.0
[/CIF]
.
The crystal structure described by Mg6VCr is beta Cu3Ti-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(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(2)Mg10V2 cuboctahedra; corners with four equivalent V(1)Mg10Cr2 cuboctahedra; corners with ten equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(2)Mg10V2 cuboctahedra; edges with two equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent V(1)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with four equivalent Cr(1)Mg10V2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; and faces with eight Mg(3,3,3)Mg8V2Cr2 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(3,3); and two equivalent V(1) atoms to form MgMg10V2 cuboctahedra that share corners with four equivalent V(1)Mg10Cr2 cuboctahedra; corners with six equivalent Mg(2)Mg10V2 cuboctahedra; corners with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent V(1)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent Cr(1)Mg10V2 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. In the fifth Mg site, Mg(4) is bonded to two equivalent Mg(2); four equivalent Mg(1); four Mg(3,3,3,3); and two equivalent Cr(1) atoms to form MgMg10Cr2 cuboctahedra that share corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with six equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent V(1)Mg10Cr2 cuboctahedra. In the sixth Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. In the seventh Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent V(1), and two equivalent Cr(1) atoms to form distorted MgMg8V2Cr2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with four equivalent Cr(1)Mg10V2 cuboctahedra; corners with ten Mg(3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with two equivalent Mg(3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Cr(1)Mg10V2 cuboctahedra; edges with four equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra. V(1) is bonded to two equivalent Mg(2); four equivalent Mg(1); four Mg(3,3); and two equivalent Cr(1) atoms to form VMg10Cr2 cuboctahedra that share corners with four equivalent Mg(2)Mg10V2 cuboctahedra; corners with six equivalent V(1)Mg10Cr2 cuboctahedra; corners with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(2)Mg10V2 cuboctahedra; edges with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; edges with four equivalent Cr(1)Mg10V2 cuboctahedra; edges with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(2)Mg10V2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent Mg(4)Mg10Cr2 cuboctahedra. Cr(1) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(3,3,3,3); and two equivalent V(1) atoms to form CrMg10V2 cuboctahedra that share corners with four equivalent Mg(4)Mg10Cr2 cuboctahedra; corners with six equivalent Cr(1)Mg10V2 cuboctahedra; corners with eight Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with two equivalent Mg(4)Mg10Cr2 cuboctahedra; edges with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; edges with four equivalent V(1)Mg10Cr2 cuboctahedra; edges with eight equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg10Cr2 cuboctahedra; faces with two equivalent V(1)Mg10Cr2 cuboctahedra; faces with two equivalent Cr(1)Mg10V2 cuboctahedra; faces with four equivalent Mg(1)Mg8V2Cr2 cuboctahedra; faces with four Mg(3,3,3,3)Mg8V2Cr2 cuboctahedra; and faces with six equivalent Mg(2)Mg10V2 cuboctahedra. is represented by the CIF file [CIF]
data_Mg6VCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.996
_cell_length_b   6.171
_cell_length_c   6.171
_cell_angle_alpha   119.715
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   165.217
_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
  Cr  Cr0  1  0.500  0.334  0.666  1.0
  Mg  Mg1  1  0.000  0.655  0.826  1.0
  Mg  Mg2  1  0.000  0.174  0.345  1.0
  Mg  Mg3  1  0.000  0.665  0.335  1.0
  Mg  Mg4  1  0.500  0.846  0.673  1.0
  Mg  Mg5  1  0.500  0.327  0.154  1.0
  Mg  Mg6  1  0.500  0.835  0.165  1.0
  V  V7  1  0.000  0.164  0.836  1.0
[/CIF]
.