The structure described by SrMg3 crystallizes in the hexagonal P-6m2 space group. Sr(1) is bonded to six equivalent Sr(1) and six equivalent Mg(2) atoms to form a mixture of corner, edge, and face-sharing SrSr6Mg6 cuboctahedra. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to six equivalent Mg(2) atoms. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1) and three equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_SrMg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.569
_cell_length_b   3.569
_cell_length_c   10.942
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   120.686
_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  0.667  0.333  0.500  1.0
  Mg  Mg1  1  0.667  0.333  0.000  1.0
  Mg  Mg2  1  0.000  0.000  0.228  1.0
  Mg  Mg3  1  0.000  0.000  0.772  1.0
[/CIF]
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The structure described by SrMg3 crystallizes in the hexagonal P-6m2 space group. Sr(1) is bonded to six equivalent Sr(1) and six equivalent Mg(2) atoms to form a mixture of corner, edge, and face-sharing SrSr6Mg6 cuboctahedra. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to six equivalent Mg(2) atoms. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1) and three equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_SrMg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.569
_cell_length_b   3.569
_cell_length_c   10.942
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   120.686
_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  0.667  0.333  0.500  1.0
  Mg  Mg1  1  0.667  0.333  0.000  1.0
  Mg  Mg2  1  0.000  0.000  0.228  1.0
  Mg  Mg3  1  0.000  0.000  0.772  1.0
[/CIF]
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