data_SrLi2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.14
_cell_length_b   5.14
_cell_length_c   4.67
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrLi2Mg
_chemical_formula_sum   'Sr1 Li2 Mg1'
_cell_volume   123.11
_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
  Sr  Sr3  1  0.57  0.57  0.0  1.0
  Li  Li0  1  0.57  0.0  0.33  1.0
  Li  Li1  1  0.0  0.57  0.33  1.0
  Mg  Mg2  1  0.0  0.0  0.0  1.0

data_SrLi2Mg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.26
_cell_length_b   7.26
_cell_length_c   4.67
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrLi2Mg
_chemical_formula_sum   'Sr2 Li4 Mg2'
_cell_volume   246.22
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Sr  Sr0  2  0.07  0.5  0.0  1.0
  Li  Li1  4  0.28  0.28  0.33  1.0
  Mg  Mg2  2  0.0  0.0  0.0  1.0

Sr Li Li Mg
Li2SrMg crystallizes in the monoclinic Cm space group. Li(1) is bonded in a 6-coordinate geometry to one Li(1), three equivalent Sr(1), and two equivalent Mg(1) atoms. The Li(1)-Li(1) bond length is 3.14 Å. There are a spread of Li(1)-Sr(1) bond distances ranging from 2.71-3.82 Å. There is one shorter (2.71 Å) and one longer (3.31 Å) Li(1)-Mg(1) bond length. Sr(1) is bonded in a 9-coordinate geometry to six equivalent Li(1) and three equivalent Mg(1) atoms. There is one shorter (3.14 Å) and two longer (3.67 Å) Sr(1)-Mg(1) bond lengths. Mg(1) is bonded in a 2-coordinate geometry to four equivalent Li(1) and three equivalent Sr(1) atoms.