The compound described by Sr2Mg1 crystallizes in the hexagonal P-62m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to two equivalent Sr(2); six Sr(1,1); and four equivalent Mg(1) atoms. In the second Sr site, Sr(1) is bonded in a 12-coordinate geometry to two equivalent Sr(2), six equivalent Sr(1), and four equivalent Mg(1) atoms. In the third Sr site, Sr(2) is bonded to six Sr(1,1) and six equivalent Mg(1) atoms to form a mixture of face and edge-sharing SrSr6Mg6 cuboctahedra. Mg(1) is bonded in a 9-coordinate geometry to three equivalent Sr(2) and six Sr(1,1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.876
_cell_length_b   6.876
_cell_length_c   6.291
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   257.618
_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
  Sr  Sr0  1  0.645  0.000  0.500  1.0
  Sr  Sr1  1  0.355  0.355  0.500  1.0
  Sr  Sr2  1  0.000  0.645  0.500  1.0
  Sr  Sr3  1  0.000  0.000  0.000  1.0
  Mg  Mg4  1  0.667  0.333  0.000  1.0
  Mg  Mg5  1  0.333  0.667  0.000  1.0
[/CIF]
.
The compound described by Sr2Mg1 crystallizes in the hexagonal P-62m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to two equivalent Sr(2); six Sr(1,1); and four equivalent Mg(1) atoms. In the second Sr site, Sr(1) is bonded in a 12-coordinate geometry to two equivalent Sr(2), six equivalent Sr(1), and four equivalent Mg(1) atoms. In the third Sr site, Sr(2) is bonded to six Sr(1,1) and six equivalent Mg(1) atoms to form a mixture of face and edge-sharing SrSr6Mg6 cuboctahedra. Mg(1) is bonded in a 9-coordinate geometry to three equivalent Sr(2) and six Sr(1,1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.876
_cell_length_b   6.876
_cell_length_c   6.291
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   257.618
_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
  Sr  Sr0  1  0.645  0.000  0.500  1.0
  Sr  Sr1  1  0.355  0.355  0.500  1.0
  Sr  Sr2  1  0.000  0.645  0.500  1.0
  Sr  Sr3  1  0.000  0.000  0.000  1.0
  Mg  Mg4  1  0.667  0.333  0.000  1.0
  Mg  Mg5  1  0.333  0.667  0.000  1.0
[/CIF]
.