data_Mg2CoAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.71
_cell_length_b   4.71
_cell_length_c   5.21
_cell_angle_alpha   99.8
_cell_angle_beta   99.8
_cell_angle_gamma   35.98
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2CoAg
_chemical_formula_sum   'Mg2 Co1 Ag1'
_cell_volume   66.85
_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
  Mg  Mg2  1  0.59  0.0  0.92  1.0
  Mg  Mg3  1  0.44  0.0  0.21  1.0
  Co  Co1  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.01  0.0  0.56  1.0

data_Mg2CoAg
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.91
_cell_length_b   4.71
_cell_length_c   5.21
_cell_angle_alpha   99.8
_cell_angle_beta   90.0
_cell_angle_gamma   107.99
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2CoAg
_chemical_formula_sum   'Mg2 Co1 Ag1'
_cell_volume   66.85
_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
  Mg  Mg0  1  0.0  0.41  0.08  1.0
  Mg  Mg1  1  0.0  0.56  0.79  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  Ag  Ag3  1  0.0  0.99  0.44  1.0

Mg Mg Co Ag
Mg Mg Co Ag 0 1 o o + 0 2 + o + 0 3 + o o 0 3 o o o 1 2 o o o 1 3 + o o 1 3 o o o 2 3 o o - 2 3 o o o 3 3 + - o 
Mg2CoAg crystallizes in the triclinic P1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 1-coordinate geometry to one Mg(2), one Co(1), and two equivalent Ag(1) atoms. The Mg(1)-Mg(2) bond length is 1.75 Å. The Mg(1)-Co(1) bond length is 1.92 Å. There is one shorter (2.97 Å) and one longer (3.00 Å) Mg(1)-Ag(1) bond length. In the second Mg site, Mg(2) is bonded in a 2-coordinate geometry to one Mg(1), one Co(1), and two equivalent Ag(1) atoms. The Mg(2)-Co(1) bond length is 2.18 Å. There is one shorter (2.97 Å) and one longer (3.00 Å) Mg(2)-Ag(1) bond length. Co(1) is bonded in a 2-coordinate geometry to one Mg(1), one Mg(2), and two equivalent Ag(1) atoms. There is one shorter (2.29 Å) and one longer (2.92 Å) Co(1)-Ag(1) bond length. Ag(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Co(1), and two equivalent Ag(1) atoms. Both Ag(1)-Ag(1) bond lengths are 2.91 Å.