The compound described by Mg2PbN2 crystallizes in the trigonal P-3m1 space group. Mg(1) is bonded to three equivalent Pb(1) and four equivalent N(1) atoms to form distorted MgPb3N4 tetrahedra that share corners with six equivalent Pb(1)Mg6N6 cuboctahedra, corners with three equivalent Mg(1)Pb3N4 tetrahedra, corners with nine equivalent N(1)Mg4Pb3 trigonal pyramids, edges with three equivalent Pb(1)Mg6N6 cuboctahedra, edges with twelve equivalent Mg(1)Pb3N4 tetrahedra, edges with three equivalent N(1)Mg4Pb3 trigonal pyramids, and  a faceface with one N(1)Mg4Pb3 trigonal pyramid. Pb(1) is bonded to six equivalent Mg(1) and six equivalent N(1) atoms to form distorted PbMg6N6 cuboctahedra that share corners with twelve equivalent Mg(1)Pb3N4 tetrahedra, corners with twelve equivalent N(1)Mg4Pb3 trigonal pyramids, edges with six equivalent Mg(1)Pb3N4 tetrahedra, edges with six equivalent N(1)Mg4Pb3 trigonal pyramids, and faces with six equivalent Pb(1)Mg6N6 cuboctahedra. N(1) is bonded to four equivalent Mg(1) and three equivalent Pb(1) atoms to form distorted NMg4Pb3 trigonal pyramids that share corners with six equivalent Pb(1)Mg6N6 cuboctahedra, corners with nine equivalent Mg(1)Pb3N4 tetrahedra, corners with three equivalent N(1)Mg4Pb3 trigonal pyramids, edges with three equivalent Pb(1)Mg6N6 cuboctahedra, edges with three equivalent Mg(1)Pb3N4 tetrahedra, edges with twelve equivalent N(1)Mg4Pb3 trigonal pyramids, and  a faceface with one Mg(1)Pb3N4 tetrahedra. is represented by the CIF file [CIF]
data_Mg2PbN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.627
_cell_length_b   3.627
_cell_length_c   6.566
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   74.797
_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  0.667  0.333  0.139  1.0
  Mg  Mg1  1  0.333  0.667  0.861  1.0
  Pb  Pb2  1  0.000  0.000  0.500  1.0
  N  N3  1  0.667  0.333  0.797  1.0
  N  N4  1  0.333  0.667  0.203  1.0
[/CIF]
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The compound described by Mg2PbN2 crystallizes in the trigonal P-3m1 space group. Mg(1) is bonded to three equivalent Pb(1) and four equivalent N(1) atoms to form distorted MgPb3N4 tetrahedra that share corners with six equivalent Pb(1)Mg6N6 cuboctahedra, corners with three equivalent Mg(1)Pb3N4 tetrahedra, corners with nine equivalent N(1)Mg4Pb3 trigonal pyramids, edges with three equivalent Pb(1)Mg6N6 cuboctahedra, edges with twelve equivalent Mg(1)Pb3N4 tetrahedra, edges with three equivalent N(1)Mg4Pb3 trigonal pyramids, and  a faceface with one N(1)Mg4Pb3 trigonal pyramid. Pb(1) is bonded to six equivalent Mg(1) and six equivalent N(1) atoms to form distorted PbMg6N6 cuboctahedra that share corners with twelve equivalent Mg(1)Pb3N4 tetrahedra, corners with twelve equivalent N(1)Mg4Pb3 trigonal pyramids, edges with six equivalent Mg(1)Pb3N4 tetrahedra, edges with six equivalent N(1)Mg4Pb3 trigonal pyramids, and faces with six equivalent Pb(1)Mg6N6 cuboctahedra. N(1) is bonded to four equivalent Mg(1) and three equivalent Pb(1) atoms to form distorted NMg4Pb3 trigonal pyramids that share corners with six equivalent Pb(1)Mg6N6 cuboctahedra, corners with nine equivalent Mg(1)Pb3N4 tetrahedra, corners with three equivalent N(1)Mg4Pb3 trigonal pyramids, edges with three equivalent Pb(1)Mg6N6 cuboctahedra, edges with three equivalent Mg(1)Pb3N4 tetrahedra, edges with twelve equivalent N(1)Mg4Pb3 trigonal pyramids, and  a faceface with one Mg(1)Pb3N4 tetrahedra. is represented by the CIF file [CIF]
data_Mg2PbN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.627
_cell_length_b   3.627
_cell_length_c   6.566
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   74.797
_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  0.667  0.333  0.139  1.0
  Mg  Mg1  1  0.333  0.667  0.861  1.0
  Pb  Pb2  1  0.000  0.000  0.500  1.0
  N  N3  1  0.667  0.333  0.797  1.0
  N  N4  1  0.333  0.667  0.203  1.0
[/CIF]
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