The crystal structure described by Li2Mg(NH)2 crystallizes in the orthorhombic Pbcn space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent H(1) atoms. Mg(1) is bonded to four equivalent N(1) atoms to form corner-sharing MgN4 tetrahedra. N(1) is bonded in a distorted single-bond geometry to one Li(2), two equivalent Li(1), two equivalent Mg(1), and one H(1) atom. H(1) is bonded in a single-bond geometry to one Li(2) and one N(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2Mg(HN)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.137
_cell_length_b   5.236
_cell_length_c   9.768
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   262.721
_cell_formula_units_Z   4
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
  Li  Li0  1  0.000  0.250  0.746  1.0
  Li  Li1  1  0.500  0.750  0.754  1.0
  Li  Li2  1  0.000  0.750  0.254  1.0
  Li  Li3  1  0.500  0.250  0.246  1.0
  Li  Li4  1  0.500  0.250  0.488  1.0
  Li  Li5  1  0.000  0.750  0.012  1.0
  Li  Li6  1  0.500  0.750  0.512  1.0
  Li  Li7  1  0.000  0.250  0.988  1.0
  Mg  Mg8  1  0.500  0.250  0.761  1.0
  Mg  Mg9  1  0.000  0.750  0.739  1.0
  Mg  Mg10  1  0.500  0.750  0.239  1.0
  Mg  Mg11  1  0.000  0.250  0.261  1.0
  H  H12  1  0.833  0.450  0.557  1.0
  H  H13  1  0.667  0.950  0.943  1.0
  H  H14  1  0.833  0.950  0.443  1.0
  H  H15  1  0.667  0.450  0.057  1.0
  H  H16  1  0.333  0.050  0.057  1.0
  H  H17  1  0.167  0.550  0.443  1.0
  H  H18  1  0.333  0.550  0.943  1.0
  H  H19  1  0.167  0.050  0.557  1.0
  N  N20  1  0.728  0.503  0.643  1.0
  N  N21  1  0.772  0.003  0.857  1.0
  N  N22  1  0.728  0.003  0.357  1.0
  N  N23  1  0.772  0.503  0.143  1.0
  N  N24  1  0.228  0.997  0.143  1.0
  N  N25  1  0.272  0.497  0.357  1.0
  N  N26  1  0.228  0.497  0.857  1.0
  N  N27  1  0.272  0.997  0.643  1.0
[/CIF]
.
The crystal structure described by Li2Mg(NH)2 crystallizes in the orthorhombic Pbcn space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent H(1) atoms. Mg(1) is bonded to four equivalent N(1) atoms to form corner-sharing MgN4 tetrahedra. N(1) is bonded in a distorted single-bond geometry to one Li(2), two equivalent Li(1), two equivalent Mg(1), and one H(1) atom. H(1) is bonded in a single-bond geometry to one Li(2) and one N(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2Mg(HN)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.137
_cell_length_b   5.236
_cell_length_c   9.768
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   262.721
_cell_formula_units_Z   4
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
  Li  Li0  1  0.000  0.250  0.746  1.0
  Li  Li1  1  0.500  0.750  0.754  1.0
  Li  Li2  1  0.000  0.750  0.254  1.0
  Li  Li3  1  0.500  0.250  0.246  1.0
  Li  Li4  1  0.500  0.250  0.488  1.0
  Li  Li5  1  0.000  0.750  0.012  1.0
  Li  Li6  1  0.500  0.750  0.512  1.0
  Li  Li7  1  0.000  0.250  0.988  1.0
  Mg  Mg8  1  0.500  0.250  0.761  1.0
  Mg  Mg9  1  0.000  0.750  0.739  1.0
  Mg  Mg10  1  0.500  0.750  0.239  1.0
  Mg  Mg11  1  0.000  0.250  0.261  1.0
  H  H12  1  0.833  0.450  0.557  1.0
  H  H13  1  0.667  0.950  0.943  1.0
  H  H14  1  0.833  0.950  0.443  1.0
  H  H15  1  0.667  0.450  0.057  1.0
  H  H16  1  0.333  0.050  0.057  1.0
  H  H17  1  0.167  0.550  0.443  1.0
  H  H18  1  0.333  0.550  0.943  1.0
  H  H19  1  0.167  0.050  0.557  1.0
  N  N20  1  0.728  0.503  0.643  1.0
  N  N21  1  0.772  0.003  0.857  1.0
  N  N22  1  0.728  0.003  0.357  1.0
  N  N23  1  0.772  0.503  0.143  1.0
  N  N24  1  0.228  0.997  0.143  1.0
  N  N25  1  0.272  0.497  0.357  1.0
  N  N26  1  0.228  0.497  0.857  1.0
  N  N27  1  0.272  0.997  0.643  1.0
[/CIF]
.