The crystal structure described by (Mg)7C crystallizes in the hexagonal P-6m2 space group. The structure consists of one 02329_fluka atom inside a Mg framework. In the Mg framework, there are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3) atoms. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form a mixture of corner and face-sharing MgMg12 cuboctahedra. is represented by the CIF file [CIF]
data_Mg7C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.091
_cell_length_b   6.091
_cell_length_c   4.891
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   157.173
_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
  Mg  Mg0  1  0.499  0.998  0.000  1.0
  Mg  Mg1  1  0.499  0.501  0.000  1.0
  Mg  Mg2  1  0.002  0.501  0.000  1.0
  Mg  Mg3  1  0.321  0.161  0.500  1.0
  Mg  Mg4  1  0.839  0.161  0.500  1.0
  Mg  Mg5  1  0.839  0.679  0.500  1.0
  Mg  Mg6  1  0.333  0.667  0.500  1.0
  C  C7  1  0.000  0.000  0.000  1.0
[/CIF]
.
The crystal structure described by (Mg)7C crystallizes in the hexagonal P-6m2 space group. The structure consists of one 02329_fluka atom inside a Mg framework. In the Mg framework, there are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3) atoms. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form a mixture of corner and face-sharing MgMg12 cuboctahedra. is represented by the CIF file [CIF]
data_Mg7C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.091
_cell_length_b   6.091
_cell_length_c   4.891
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   157.173
_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
  Mg  Mg0  1  0.499  0.998  0.000  1.0
  Mg  Mg1  1  0.499  0.501  0.000  1.0
  Mg  Mg2  1  0.002  0.501  0.000  1.0
  Mg  Mg3  1  0.321  0.161  0.500  1.0
  Mg  Mg4  1  0.839  0.161  0.500  1.0
  Mg  Mg5  1  0.839  0.679  0.500  1.0
  Mg  Mg6  1  0.333  0.667  0.500  1.0
  C  C7  1  0.000  0.000  0.000  1.0
[/CIF]
.