The material described by Mg14SiC crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 8-coordinate geometry to two equivalent Mg(6), two equivalent Mg(7), and four equivalent Mg(4) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms. In the third Mg site, Mg(3) is bonded in a 1-coordinate geometry to two equivalent Mg(6), one Si(1), and one C(1) atom. In the fourth Mg site, Mg(4) is bonded in a 11-coordinate geometry to one Mg(4), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms. In the fifth Mg site, Mg(5) is bonded in a 2-coordinate geometry to one Mg(2), one Mg(4), two equivalent Mg(6), one Si(1), and one C(1) atom. In the sixth Mg site, Mg(6) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), four equivalent Mg(5), and one Si(1) atom. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(4), one Si(1), and one C(1) atom. Si(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), two equivalent Mg(6), two equivalent Mg(7), and four equivalent Mg(5) atoms. C(1) is bonded in a 8-coordinate geometry to two equivalent Mg(3), two equivalent Mg(7), and four equivalent Mg(5) atoms. is represented by the CIF card [CIF]
data_Mg14SiC
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.375
_cell_length_b   7.790
_cell_length_c   8.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   127.664
_symmetry_Int_Tables_number   1
_cell_volume   333.129
_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  0.278  0.389  0.625  1.0
  Mg  Mg1  1  0.321  0.911  0.625  1.0
  Mg  Mg2  1  0.786  0.367  0.125  1.0
  Mg  Mg3  1  0.802  0.443  0.625  1.0
  Mg  Mg4  1  0.786  0.919  0.125  1.0
  Mg  Mg5  1  0.802  0.859  0.625  1.0
  Mg  Mg6  1  0.252  0.065  0.309  1.0
  Mg  Mg7  1  0.252  0.065  0.941  1.0
  Mg  Mg8  1  0.252  0.687  0.309  1.0
  Mg  Mg9  1  0.252  0.687  0.941  1.0
  Mg  Mg10  1  0.807  0.153  0.399  1.0
  Mg  Mg11  1  0.807  0.153  0.851  1.0
  Mg  Mg12  1  0.690  0.595  0.330  1.0
  Mg  Mg13  1  0.690  0.595  0.920  1.0
  Si  Si14  1  0.221  0.361  0.125  1.0
  C  C15  1  0.001  0.751  0.125  1.0
[/CIF]
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The material described by Mg14SiC crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 8-coordinate geometry to two equivalent Mg(6), two equivalent Mg(7), and four equivalent Mg(4) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms. In the third Mg site, Mg(3) is bonded in a 1-coordinate geometry to two equivalent Mg(6), one Si(1), and one C(1) atom. In the fourth Mg site, Mg(4) is bonded in a 11-coordinate geometry to one Mg(4), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms. In the fifth Mg site, Mg(5) is bonded in a 2-coordinate geometry to one Mg(2), one Mg(4), two equivalent Mg(6), one Si(1), and one C(1) atom. In the sixth Mg site, Mg(6) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), four equivalent Mg(5), and one Si(1) atom. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(4), one Si(1), and one C(1) atom. Si(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), two equivalent Mg(6), two equivalent Mg(7), and four equivalent Mg(5) atoms. C(1) is bonded in a 8-coordinate geometry to two equivalent Mg(3), two equivalent Mg(7), and four equivalent Mg(5) atoms. is represented by the CIF card [CIF]
data_Mg14SiC
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.375
_cell_length_b   7.790
_cell_length_c   8.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   127.664
_symmetry_Int_Tables_number   1
_cell_volume   333.129
_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  0.278  0.389  0.625  1.0
  Mg  Mg1  1  0.321  0.911  0.625  1.0
  Mg  Mg2  1  0.786  0.367  0.125  1.0
  Mg  Mg3  1  0.802  0.443  0.625  1.0
  Mg  Mg4  1  0.786  0.919  0.125  1.0
  Mg  Mg5  1  0.802  0.859  0.625  1.0
  Mg  Mg6  1  0.252  0.065  0.309  1.0
  Mg  Mg7  1  0.252  0.065  0.941  1.0
  Mg  Mg8  1  0.252  0.687  0.309  1.0
  Mg  Mg9  1  0.252  0.687  0.941  1.0
  Mg  Mg10  1  0.807  0.153  0.399  1.0
  Mg  Mg11  1  0.807  0.153  0.851  1.0
  Mg  Mg12  1  0.690  0.595  0.330  1.0
  Mg  Mg13  1  0.690  0.595  0.920  1.0
  Si  Si14  1  0.221  0.361  0.125  1.0
  C  C15  1  0.001  0.751  0.125  1.0
[/CIF]
.