The structure described by KMg14C crystallizes in the hexagonal P-6m2 space group. K(1) is bonded to six equivalent Mg(1) and six equivalent Mg(3) atoms to form KMg12 cuboctahedra that share corners with six equivalent K(1)Mg12 cuboctahedra and faces with six equivalent Mg(4)Mg12 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent K(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Mg(4), four equivalent Mg(2), and four equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to one K(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and one C(1) atom. In the fourth Mg site, Mg(4) is bonded to three equivalent Mg(1), three equivalent Mg(2), and six equivalent Mg(3) atoms to form distorted MgMg12 cuboctahedra that share corners with six equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, and faces with three equivalent K(1)Mg12 cuboctahedra. C(1) is bonded in a 6-coordinate geometry to six equivalent Mg(3) atoms. is represented by the CIF file [CIF]
data_KMg14C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.444
_cell_length_b   6.444
_cell_length_c   10.243
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   368.338
_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
  K  K0  1  0.167  0.333  0.125  1.0
  Mg  Mg1  1  0.180  0.840  0.125  1.0
  Mg  Mg2  1  0.151  0.825  0.625  1.0
  Mg  Mg3  1  0.660  0.320  0.125  1.0
  Mg  Mg4  1  0.675  0.349  0.625  1.0
  Mg  Mg5  1  0.660  0.840  0.125  1.0
  Mg  Mg6  1  0.675  0.825  0.625  1.0
  Mg  Mg7  1  0.327  0.173  0.407  1.0
  Mg  Mg8  1  0.327  0.173  0.843  1.0
  Mg  Mg9  1  0.327  0.654  0.407  1.0
  Mg  Mg10  1  0.327  0.654  0.843  1.0
  Mg  Mg11  1  0.846  0.173  0.407  1.0
  Mg  Mg12  1  0.846  0.173  0.843  1.0
  Mg  Mg13  1  0.833  0.667  0.366  1.0
  Mg  Mg14  1  0.833  0.667  0.884  1.0
  C  C15  1  0.167  0.333  0.625  1.0
[/CIF]
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The structure described by KMg14C crystallizes in the hexagonal P-6m2 space group. K(1) is bonded to six equivalent Mg(1) and six equivalent Mg(3) atoms to form KMg12 cuboctahedra that share corners with six equivalent K(1)Mg12 cuboctahedra and faces with six equivalent Mg(4)Mg12 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent K(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Mg(4), four equivalent Mg(2), and four equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to one K(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and one C(1) atom. In the fourth Mg site, Mg(4) is bonded to three equivalent Mg(1), three equivalent Mg(2), and six equivalent Mg(3) atoms to form distorted MgMg12 cuboctahedra that share corners with six equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, and faces with three equivalent K(1)Mg12 cuboctahedra. C(1) is bonded in a 6-coordinate geometry to six equivalent Mg(3) atoms. is represented by the CIF file [CIF]
data_KMg14C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.444
_cell_length_b   6.444
_cell_length_c   10.243
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   368.338
_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
  K  K0  1  0.167  0.333  0.125  1.0
  Mg  Mg1  1  0.180  0.840  0.125  1.0
  Mg  Mg2  1  0.151  0.825  0.625  1.0
  Mg  Mg3  1  0.660  0.320  0.125  1.0
  Mg  Mg4  1  0.675  0.349  0.625  1.0
  Mg  Mg5  1  0.660  0.840  0.125  1.0
  Mg  Mg6  1  0.675  0.825  0.625  1.0
  Mg  Mg7  1  0.327  0.173  0.407  1.0
  Mg  Mg8  1  0.327  0.173  0.843  1.0
  Mg  Mg9  1  0.327  0.654  0.407  1.0
  Mg  Mg10  1  0.327  0.654  0.843  1.0
  Mg  Mg11  1  0.846  0.173  0.407  1.0
  Mg  Mg12  1  0.846  0.173  0.843  1.0
  Mg  Mg13  1  0.833  0.667  0.366  1.0
  Mg  Mg14  1  0.833  0.667  0.884  1.0
  C  C15  1  0.167  0.333  0.625  1.0
[/CIF]
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