The material described by MgSi2 crystallizes in the orthorhombic Imma space group. Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1) and twelve equivalent Si(1) atoms. Si(1) is bonded in a 11-coordinate geometry to six equivalent Mg(1) and five equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_MgSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.754
_cell_length_b   4.437
_cell_length_c   4.437
_cell_angle_alpha   117.265
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   48.186
_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  0.500  1.000  1.000  1.0
  Si  Si1  1  1.000  0.667  0.333  1.0
  Si  Si2  1  0.000  0.333  0.667  1.0
[/CIF]
.
The material described by MgSi2 crystallizes in the orthorhombic Imma space group. Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1) and twelve equivalent Si(1) atoms. Si(1) is bonded in a 11-coordinate geometry to six equivalent Mg(1) and five equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_MgSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.754
_cell_length_b   4.437
_cell_length_c   4.437
_cell_angle_alpha   117.265
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   48.186
_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  0.500  1.000  1.000  1.0
  Si  Si1  1  1.000  0.667  0.333  1.0
  Si  Si2  1  0.000  0.333  0.667  1.0
[/CIF]
.