The material structure described by MgB2C2 crystallizes in the orthorhombic Pnnm space group. Mg(1) is bonded to six equivalent B(1) and six equivalent C(1) atoms to form a mixture of distorted edge and face-sharing MgB6C6 cuboctahedra. B(1) is bonded in a trigonal planar geometry to three equivalent Mg(1) and three equivalent C(1) atoms. C(1) is bonded in a distorted trigonal planar geometry to three equivalent Mg(1) and three equivalent B(1) atoms. is represented by the CIF file [CIF]
data_Mg(BC)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.765
_cell_length_b   4.615
_cell_length_c   7.179
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   91.611
_cell_formula_units_Z   2
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  0.500  0.500  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  B  B2  1  0.500  0.883  0.730  1.0
  B  B3  1  0.500  0.117  0.270  1.0
  B  B4  1  0.000  0.617  0.230  1.0
  B  B5  1  0.000  0.383  0.770  1.0
  C  C6  1  0.500  0.785  0.220  1.0
  C  C7  1  0.500  0.215  0.780  1.0
  C  C8  1  0.000  0.715  0.720  1.0
  C  C9  1  0.000  0.285  0.280  1.0
[/CIF]
.
The material structure described by MgB2C2 crystallizes in the orthorhombic Pnnm space group. Mg(1) is bonded to six equivalent B(1) and six equivalent C(1) atoms to form a mixture of distorted edge and face-sharing MgB6C6 cuboctahedra. B(1) is bonded in a trigonal planar geometry to three equivalent Mg(1) and three equivalent C(1) atoms. C(1) is bonded in a distorted trigonal planar geometry to three equivalent Mg(1) and three equivalent B(1) atoms. is represented by the CIF file [CIF]
data_Mg(BC)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.765
_cell_length_b   4.615
_cell_length_c   7.179
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   91.611
_cell_formula_units_Z   2
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  0.500  0.500  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  B  B2  1  0.500  0.883  0.730  1.0
  B  B3  1  0.500  0.117  0.270  1.0
  B  B4  1  0.000  0.617  0.230  1.0
  B  B5  1  0.000  0.383  0.770  1.0
  C  C6  1  0.500  0.785  0.220  1.0
  C  C7  1  0.500  0.215  0.780  1.0
  C  C8  1  0.000  0.715  0.720  1.0
  C  C9  1  0.000  0.285  0.280  1.0
[/CIF]
.