The material described by Mg6LaSi crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 2-coordinate geometry to one Mg(2), one La(1), and two equivalent Si(1) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(4), four equivalent Mg(3), and two equivalent La(1) atoms. In the third Mg site, Mg(3) is bonded in a 1-coordinate geometry to two equivalent Mg(2), two equivalent La(1), and one Si(1) atom. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent Mg(2) atoms. La(1) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), four equivalent Mg(3), and two equivalent Si(1) atoms. Si(1) is bonded in a 8-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), and two equivalent La(1) atoms. is represented by the CIF card [CIF]
data_LaMg6Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.708
_cell_length_b   6.281
_cell_length_c   7.222
_cell_angle_alpha   115.779
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   192.321
_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
  La  La0  1  0.000  0.795  0.590  1.0
  Mg  Mg1  1  0.000  0.315  0.143  1.0
  Mg  Mg2  1  0.000  0.828  0.143  1.0
  Mg  Mg3  1  0.000  0.353  0.707  1.0
  Mg  Mg4  1  0.500  0.188  0.879  1.0
  Mg  Mg5  1  0.500  0.691  0.879  1.0
  Mg  Mg6  1  0.500  0.199  0.398  1.0
  Si  Si7  1  0.500  0.630  0.260  1.0
[/CIF]
.
The material described by Mg6LaSi crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 2-coordinate geometry to one Mg(2), one La(1), and two equivalent Si(1) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(4), four equivalent Mg(3), and two equivalent La(1) atoms. In the third Mg site, Mg(3) is bonded in a 1-coordinate geometry to two equivalent Mg(2), two equivalent La(1), and one Si(1) atom. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent Mg(2) atoms. La(1) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), four equivalent Mg(3), and two equivalent Si(1) atoms. Si(1) is bonded in a 8-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), and two equivalent La(1) atoms. is represented by the CIF card [CIF]
data_LaMg6Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.708
_cell_length_b   6.281
_cell_length_c   7.222
_cell_angle_alpha   115.779
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   192.321
_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
  La  La0  1  0.000  0.795  0.590  1.0
  Mg  Mg1  1  0.000  0.315  0.143  1.0
  Mg  Mg2  1  0.000  0.828  0.143  1.0
  Mg  Mg3  1  0.000  0.353  0.707  1.0
  Mg  Mg4  1  0.500  0.188  0.879  1.0
  Mg  Mg5  1  0.500  0.691  0.879  1.0
  Mg  Mg6  1  0.500  0.199  0.398  1.0
  Si  Si7  1  0.500  0.630  0.260  1.0
[/CIF]
.