The structure described by SrCa is alpha La-derived structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form SrSr6Ca6 cuboctahedra that share corners with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Sr(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra. Ca(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form CaSr6Ca6 cuboctahedra that share corners with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Ca(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.146
_cell_length_b   7.146
_cell_length_c   7.146
_cell_angle_alpha   33.635
_cell_angle_beta   33.635
_cell_angle_gamma   33.635
_symmetry_Int_Tables_number   1
_cell_volume   99.716
_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
  Ca  Ca1  1  0.000  0.000  0.000  1.0
[/CIF]
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The structure described by SrCa is alpha La-derived structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form SrSr6Ca6 cuboctahedra that share corners with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Sr(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra. Ca(1) is bonded to six equivalent Sr(1) and six equivalent Ca(1) atoms to form CaSr6Ca6 cuboctahedra that share corners with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra, edges with twelve equivalent Ca(1)Sr6Ca6 cuboctahedra, faces with six equivalent Ca(1)Sr6Ca6 cuboctahedra, and faces with twelve equivalent Sr(1)Sr6Ca6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.146
_cell_length_b   7.146
_cell_length_c   7.146
_cell_angle_alpha   33.635
_cell_angle_beta   33.635
_cell_angle_gamma   33.635
_symmetry_Int_Tables_number   1
_cell_volume   99.716
_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
  Ca  Ca1  1  0.000  0.000  0.000  1.0
[/CIF]
.