The material structure described by MgSi crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 7-coordinate geometry to one Si(2), two equivalent Si(3), and four equivalent Si(1) atoms. In the second Mg site, Mg(2) is bonded in a 7-coordinate geometry to one Si(1) and six equivalent Si(2) atoms. In the third Mg site, Mg(3) is bonded in a 7-coordinate geometry to two equivalent Si(1) and five equivalent Si(3) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one Mg(2), two equivalent Mg(3), four equivalent Mg(1), and two equivalent Si(3) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Mg(1), six equivalent Mg(2), and two equivalent Si(2) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Mg(1), five equivalent Mg(3), 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   14.862
_cell_length_b   14.862
_cell_length_c   4.058
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   165.506
_symmetry_Int_Tables_number   1
_cell_volume   224.330
_cell_formula_units_Z   6
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  0.117  0.883  0.750  1.0
  Mg  Mg1  1  0.451  0.549  0.750  1.0
  Mg  Mg2  1  0.284  0.716  0.250  1.0
  Mg  Mg3  1  0.549  0.451  0.250  1.0
  Mg  Mg4  1  0.883  0.117  0.250  1.0
  Mg  Mg5  1  0.716  0.284  0.750  1.0
  Si  Si6  1  0.640  0.360  0.250  1.0
  Si  Si7  1  0.975  0.025  0.250  1.0
  Si  Si8  1  0.807  0.193  0.750  1.0
  Si  Si9  1  0.025  0.975  0.750  1.0
  Si  Si10  1  0.360  0.640  0.750  1.0
  Si  Si11  1  0.193  0.807  0.250  1.0
[/CIF]
.
The material structure described by MgSi crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 7-coordinate geometry to one Si(2), two equivalent Si(3), and four equivalent Si(1) atoms. In the second Mg site, Mg(2) is bonded in a 7-coordinate geometry to one Si(1) and six equivalent Si(2) atoms. In the third Mg site, Mg(3) is bonded in a 7-coordinate geometry to two equivalent Si(1) and five equivalent Si(3) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one Mg(2), two equivalent Mg(3), four equivalent Mg(1), and two equivalent Si(3) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Mg(1), six equivalent Mg(2), and two equivalent Si(2) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Mg(1), five equivalent Mg(3), 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   14.862
_cell_length_b   14.862
_cell_length_c   4.058
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   165.506
_symmetry_Int_Tables_number   1
_cell_volume   224.330
_cell_formula_units_Z   6
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  0.117  0.883  0.750  1.0
  Mg  Mg1  1  0.451  0.549  0.750  1.0
  Mg  Mg2  1  0.284  0.716  0.250  1.0
  Mg  Mg3  1  0.549  0.451  0.250  1.0
  Mg  Mg4  1  0.883  0.117  0.250  1.0
  Mg  Mg5  1  0.716  0.284  0.750  1.0
  Si  Si6  1  0.640  0.360  0.250  1.0
  Si  Si7  1  0.975  0.025  0.250  1.0
  Si  Si8  1  0.807  0.193  0.750  1.0
  Si  Si9  1  0.025  0.975  0.750  1.0
  Si  Si10  1  0.360  0.640  0.750  1.0
  Si  Si11  1  0.193  0.807  0.250  1.0
[/CIF]
.