The crystal structure described by Mg2Ca crystallizes in the monoclinic C2/m space group. Ca(1) is bonded in a 12-coordinate geometry to four equivalent Ca(1), three equivalent Mg(1), and five equivalent Mg(2) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to three equivalent Ca(1), four equivalent Mg(2), and five equivalent Mg(1) atoms. In the second Mg site, Mg(2) is bonded in a 9-coordinate geometry to five equivalent Ca(1) and four equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_CaMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.658
_cell_length_b   6.658
_cell_length_c   7.884
_cell_angle_alpha   73.163
_cell_angle_beta   73.163
_cell_angle_gamma   30.918
_symmetry_Int_Tables_number   1
_cell_volume   171.253
_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  0.825  0.825  0.635  1.0
  Ca  Ca1  1  0.175  0.175  0.365  1.0
  Mg  Mg2  1  0.137  0.137  0.968  1.0
  Mg  Mg3  1  0.531  0.531  0.728  1.0
  Mg  Mg4  1  0.469  0.469  0.272  1.0
  Mg  Mg5  1  0.863  0.863  0.032  1.0
[/CIF]
.
The crystal structure described by Mg2Ca crystallizes in the monoclinic C2/m space group. Ca(1) is bonded in a 12-coordinate geometry to four equivalent Ca(1), three equivalent Mg(1), and five equivalent Mg(2) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to three equivalent Ca(1), four equivalent Mg(2), and five equivalent Mg(1) atoms. In the second Mg site, Mg(2) is bonded in a 9-coordinate geometry to five equivalent Ca(1) and four equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_CaMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.658
_cell_length_b   6.658
_cell_length_c   7.884
_cell_angle_alpha   73.163
_cell_angle_beta   73.163
_cell_angle_gamma   30.918
_symmetry_Int_Tables_number   1
_cell_volume   171.253
_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  0.825  0.825  0.635  1.0
  Ca  Ca1  1  0.175  0.175  0.365  1.0
  Mg  Mg2  1  0.137  0.137  0.968  1.0
  Mg  Mg3  1  0.531  0.531  0.728  1.0
  Mg  Mg4  1  0.469  0.469  0.272  1.0
  Mg  Mg5  1  0.863  0.863  0.032  1.0
[/CIF]
.