The material described by MgSi crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded in a 7-coordinate geometry to seven equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to seven equivalent Mg(1) and two equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_MgSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.630
_cell_length_b   5.630
_cell_length_c   4.340
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   149.044
_symmetry_Int_Tables_number   1
_cell_volume   70.768
_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
  Mg  Mg0  1  0.832  0.168  0.750  1.0
  Mg  Mg1  1  0.168  0.832  0.250  1.0
  Si  Si2  1  0.429  0.571  0.250  1.0
  Si  Si3  1  0.571  0.429  0.750  1.0
[/CIF]
.
The material described by MgSi crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded in a 7-coordinate geometry to seven equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to seven equivalent Mg(1) and two equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_MgSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.630
_cell_length_b   5.630
_cell_length_c   4.340
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   149.044
_symmetry_Int_Tables_number   1
_cell_volume   70.768
_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
  Mg  Mg0  1  0.832  0.168  0.750  1.0
  Mg  Mg1  1  0.168  0.832  0.250  1.0
  Si  Si2  1  0.429  0.571  0.250  1.0
  Si  Si3  1  0.571  0.429  0.750  1.0
[/CIF]
.