data_SrMgSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.83
_cell_length_b   4.83
_cell_length_c   4.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMgSb
_chemical_formula_sum   'Sr1 Mg1 Sb1'
_cell_volume   94.49
_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  Sr2  1  0.0  0.79  0.12  1.0
  Mg  Mg0  1  0.0  0.0  0.66  1.0
  Sb  Sb1  1  0.41  0.39  0.9  1.0

data_SrMgSb
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.68
_cell_length_b   4.83
_cell_length_c   4.83
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMgSb
_chemical_formula_sum   'Sr1 Mg1 Sb1'
_cell_volume   94.49
_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  Sr0  1  0.12  0.0  0.79  1.0
  Mg  Mg1  1  0.66  0.0  0.0  1.0
  Sb  Sb2  1  0.9  0.41  0.39  1.0

Sr Mg Sb
SrMgSb crystallizes in the triclinic P1 space group. Sr(1) is bonded in a 5-coordinate geometry to two equivalent Mg(1) and three equivalent Sb(1) atoms. There is one shorter (2.40 Å) and one longer (2.72 Å) Sr(1)-Mg(1) bond length. There are a spread of Sr(1)-Sb(1) bond distances ranging from 2.70-3.52 Å. Mg(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Sb(1) atoms. There is one shorter (2.26 Å) and one longer (3.10 Å) Mg(1)-Sb(1) bond length. Sb(1) is bonded in a 5-coordinate geometry to three equivalent Sr(1) and two equivalent Mg(1) atoms.