data_Mg2GaCo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.1
_cell_length_b   3.1
_cell_length_c   6.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2GaCo
_chemical_formula_sum   'Mg2 Ga1 Co1'
_cell_volume   66.74
_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  0.0  0.0  0.71  1.0
  Mg  Mg3  1  0.55  0.55  0.08  1.0
  Ga  Ga1  1  0.55  0.55  0.83  1.0
  Co  Co0  1  0.0  0.0  0.74  1.0

data_Mg2GaCo
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.38
_cell_length_b   4.38
_cell_length_c   6.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2GaCo
_chemical_formula_sum   'Mg4 Ga2 Co2'
_cell_volume   133.49
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.71  1.0
  Mg  Mg1  2  0.05  0.5  0.08  1.0
  Ga  Ga2  2  0.05  0.5  0.83  1.0
  Co  Co3  2  0.0  0.0  0.74  1.0

Mg Mg Ga Co
Mg Mg Ga Co 0 3 o o o 0 2 o - o 0 2 - o o 0 2 - - o 1 2 o o - 2 3 o + o 2 3 + o o 2 3 + + o 
MgCoMgGa crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two cobalt;magnesium molecules and two MgGa clusters. In each MgGa cluster, Mg(2) is bonded in a single-bond geometry to one Ga(1) atom. The Mg(2)-Ga(1) bond length is 1.75 Å. Ga(1) is bonded in a distorted single-bond geometry to one Mg(2) atom.