The crystal structure described by MgOSrO is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent O(1) atoms to form SrO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with six equivalent Sr(1)O6 octahedra, and edges with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Sr(1)O6 octahedra, edges with six equivalent Sr(1)O6 octahedra, and edges with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. O(1) is bonded to three equivalent Sr(1) and three equivalent Mg(1) atoms to form a mixture of edge and corner-sharing OSr3Mg3 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_SrMgO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.356
_cell_length_b   3.356
_cell_length_c   5.852
_cell_angle_alpha   106.666
_cell_angle_beta   73.334
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   53.872
_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  0.500  0.500  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  O  O2  1  0.262  0.738  0.213  1.0
  O  O3  1  0.738  0.262  0.787  1.0
[/CIF]
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The crystal structure described by MgOSrO is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent O(1) atoms to form SrO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with six equivalent Sr(1)O6 octahedra, and edges with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Sr(1)O6 octahedra, edges with six equivalent Sr(1)O6 octahedra, and edges with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. O(1) is bonded to three equivalent Sr(1) and three equivalent Mg(1) atoms to form a mixture of edge and corner-sharing OSr3Mg3 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_SrMgO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.356
_cell_length_b   3.356
_cell_length_c   5.852
_cell_angle_alpha   106.666
_cell_angle_beta   73.334
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   53.872
_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  0.500  0.500  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  O  O2  1  0.262  0.738  0.213  1.0
  O  O3  1  0.738  0.262  0.787  1.0
[/CIF]
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