The compound described by Sr5Mg crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 3-coordinate geometry to three equivalent Sr(2) and three equivalent Mg(1) atoms. In the second Sr site, Sr(2) is bonded to three equivalent Sr(1), three equivalent Sr(3), and six equivalent Sr(2) atoms to form a mixture of edge, face, and corner-sharing SrSr12 cuboctahedra. In the third Sr site, Sr(3) is bonded to six equivalent Sr(2) and six equivalent Sr(3) atoms to form a mixture of edge, face, and corner-sharing SrSr12 cuboctahedra. Mg(1) is bonded in a 6-coordinate geometry to six equivalent Sr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr5Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.276
_cell_length_b   4.276
_cell_length_c   19.126
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   302.877
_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  0.333  0.667  0.866  1.0
  Sr  Sr1  1  0.000  0.000  0.682  1.0
  Sr  Sr2  1  0.333  0.667  0.500  1.0
  Sr  Sr3  1  0.000  0.000  0.318  1.0
  Sr  Sr4  1  0.333  0.667  0.134  1.0
  Mg  Mg5  1  0.000  0.000  0.000  1.0
[/CIF]
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The compound described by Sr5Mg crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 3-coordinate geometry to three equivalent Sr(2) and three equivalent Mg(1) atoms. In the second Sr site, Sr(2) is bonded to three equivalent Sr(1), three equivalent Sr(3), and six equivalent Sr(2) atoms to form a mixture of edge, face, and corner-sharing SrSr12 cuboctahedra. In the third Sr site, Sr(3) is bonded to six equivalent Sr(2) and six equivalent Sr(3) atoms to form a mixture of edge, face, and corner-sharing SrSr12 cuboctahedra. Mg(1) is bonded in a 6-coordinate geometry to six equivalent Sr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr5Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.276
_cell_length_b   4.276
_cell_length_c   19.126
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   302.877
_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  0.333  0.667  0.866  1.0
  Sr  Sr1  1  0.000  0.000  0.682  1.0
  Sr  Sr2  1  0.333  0.667  0.500  1.0
  Sr  Sr3  1  0.000  0.000  0.318  1.0
  Sr  Sr4  1  0.333  0.667  0.134  1.0
  Mg  Mg5  1  0.000  0.000  0.000  1.0
[/CIF]
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