The compound described by MgCa crystallizes in the trigonal P-3m1 space group. Ca(1) is bonded to nine equivalent Ca(1) and three equivalent Mg(1) atoms to form a mixture of distorted edge, face, and corner-sharing CaCa9Mg3 cuboctahedra. Mg(1) is bonded in a 6-coordinate geometry to three equivalent Ca(1) and three equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_CaMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.637
_cell_length_b   3.637
_cell_length_c   11.336
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   129.834
_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
  Ca  Ca0  1  0.667  0.333  0.643  1.0
  Ca  Ca1  1  0.333  0.667  0.357  1.0
  Mg  Mg2  1  0.333  0.667  0.887  1.0
  Mg  Mg3  1  0.667  0.333  0.113  1.0
[/CIF]
.
The compound described by MgCa crystallizes in the trigonal P-3m1 space group. Ca(1) is bonded to nine equivalent Ca(1) and three equivalent Mg(1) atoms to form a mixture of distorted edge, face, and corner-sharing CaCa9Mg3 cuboctahedra. Mg(1) is bonded in a 6-coordinate geometry to three equivalent Ca(1) and three equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_CaMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.637
_cell_length_b   3.637
_cell_length_c   11.336
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   129.834
_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
  Ca  Ca0  1  0.667  0.333  0.643  1.0
  Ca  Ca1  1  0.333  0.667  0.357  1.0
  Mg  Mg2  1  0.333  0.667  0.887  1.0
  Mg  Mg3  1  0.667  0.333  0.113  1.0
[/CIF]
.