data_Mg2InSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.44
_cell_length_b   4.44
_cell_length_c   4.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2InSi
_chemical_formula_sum   'Mg2 In1 Si1'
_cell_volume   81.9
_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  Mg1  1  0.22  0.0  0.08  1.0
  Mg  Mg2  1  0.0  0.22  0.08  1.0
  In  In0  1  0.22  0.22  0.0  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0

data_Mg2InSi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.28
_cell_length_b   6.28
_cell_length_c   4.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2InSi
_chemical_formula_sum   'Mg4 In2 Si2'
_cell_volume   163.8
_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  4  0.11  0.11  0.08  1.0
  In  In1  2  0.22  0.0  0.0  1.0
  Si  Si2  2  0.0  0.0  0.0  1.0

Mg Mg In Si
Mg2InSi is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Mg2InSi clusters. Mg(1) is bonded in an L-shaped geometry to one In(1) and one Si(1) atom. The Mg(1)-In(1) bond length is 1.03 Å. The Mg(1)-Si(1) bond length is 1.03 Å. In(1) is bonded in an L-shaped geometry to two equivalent Mg(1) atoms. Si(1) is bonded in an L-shaped geometry to two equivalent Mg(1) atoms.