The compound described by Mg3(BiN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one N(2) and three equivalent N(1) atoms to form a mixture of distorted edge and corner-sharing MgN4 tetrahedra. In the second Mg site, Mg(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted corner-sharing MgN4 tetrahedra. Bi(1) is bonded in a 3-coordinate geometry to one N(1) and two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded to one Mg(2), three equivalent Mg(1), and one Bi(1) atom to form NMg4Bi trigonal bipyramids that share corners with five equivalent N(2)Mg2Bi2 tetrahedra, corners with three equivalent N(1)Mg4Bi trigonal bipyramids,  an edgeedge with one N(2)Mg2Bi2 tetrahedra, and edges with two equivalent N(1)Mg4Bi trigonal bipyramids. In the second N site, N(2) is bonded to one Mg(1), one Mg(2), and two equivalent Bi(1) atoms to form distorted NMg2Bi2 tetrahedra that share corners with three equivalent N(2)Mg2Bi2 tetrahedra, corners with five equivalent N(1)Mg4Bi trigonal bipyramids, and  an edgeedge with one N(1)Mg4Bi trigonal bipyramid. is represented by the CIF card [CIF]
data_Mg3(BiN2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.171
_cell_length_b   10.471
_cell_length_c   5.458
_cell_angle_alpha   90.000
_cell_angle_beta   97.737
_cell_angle_gamma   136.896
_symmetry_Int_Tables_number   1
_cell_volume   274.565
_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  0.220  0.029  0.142  1.0
  Mg  Mg1  1  0.780  0.809  0.358  1.0
  Mg  Mg2  1  0.780  0.971  0.858  1.0
  Mg  Mg3  1  0.220  0.191  0.642  1.0
  Mg  Mg4  1  0.000  0.724  0.750  1.0
  Mg  Mg5  1  0.000  0.276  0.250  1.0
  Bi  Bi6  1  0.643  0.206  0.697  1.0
  Bi  Bi7  1  0.357  0.563  0.803  1.0
  Bi  Bi8  1  0.357  0.794  0.303  1.0
  Bi  Bi9  1  0.643  0.437  0.197  1.0
  N  N10  1  0.188  0.972  0.535  1.0
  N  N11  1  0.812  0.784  0.965  1.0
  N  N12  1  0.812  0.028  0.465  1.0
  N  N13  1  0.188  0.216  0.035  1.0
  N  N14  1  0.639  0.218  0.114  1.0
  N  N15  1  0.361  0.578  0.386  1.0
  N  N16  1  0.361  0.782  0.886  1.0
  N  N17  1  0.639  0.422  0.614  1.0
[/CIF]
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The compound described by Mg3(BiN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one N(2) and three equivalent N(1) atoms to form a mixture of distorted edge and corner-sharing MgN4 tetrahedra. In the second Mg site, Mg(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted corner-sharing MgN4 tetrahedra. Bi(1) is bonded in a 3-coordinate geometry to one N(1) and two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded to one Mg(2), three equivalent Mg(1), and one Bi(1) atom to form NMg4Bi trigonal bipyramids that share corners with five equivalent N(2)Mg2Bi2 tetrahedra, corners with three equivalent N(1)Mg4Bi trigonal bipyramids,  an edgeedge with one N(2)Mg2Bi2 tetrahedra, and edges with two equivalent N(1)Mg4Bi trigonal bipyramids. In the second N site, N(2) is bonded to one Mg(1), one Mg(2), and two equivalent Bi(1) atoms to form distorted NMg2Bi2 tetrahedra that share corners with three equivalent N(2)Mg2Bi2 tetrahedra, corners with five equivalent N(1)Mg4Bi trigonal bipyramids, and  an edgeedge with one N(1)Mg4Bi trigonal bipyramid. is represented by the CIF card [CIF]
data_Mg3(BiN2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.171
_cell_length_b   10.471
_cell_length_c   5.458
_cell_angle_alpha   90.000
_cell_angle_beta   97.737
_cell_angle_gamma   136.896
_symmetry_Int_Tables_number   1
_cell_volume   274.565
_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  0.220  0.029  0.142  1.0
  Mg  Mg1  1  0.780  0.809  0.358  1.0
  Mg  Mg2  1  0.780  0.971  0.858  1.0
  Mg  Mg3  1  0.220  0.191  0.642  1.0
  Mg  Mg4  1  0.000  0.724  0.750  1.0
  Mg  Mg5  1  0.000  0.276  0.250  1.0
  Bi  Bi6  1  0.643  0.206  0.697  1.0
  Bi  Bi7  1  0.357  0.563  0.803  1.0
  Bi  Bi8  1  0.357  0.794  0.303  1.0
  Bi  Bi9  1  0.643  0.437  0.197  1.0
  N  N10  1  0.188  0.972  0.535  1.0
  N  N11  1  0.812  0.784  0.965  1.0
  N  N12  1  0.812  0.028  0.465  1.0
  N  N13  1  0.188  0.216  0.035  1.0
  N  N14  1  0.639  0.218  0.114  1.0
  N  N15  1  0.361  0.578  0.386  1.0
  N  N16  1  0.361  0.782  0.886  1.0
  N  N17  1  0.639  0.422  0.614  1.0
[/CIF]
.