The material structure described by La(MgSi)2 crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. La(1) is bonded to eight equivalent Si(1) atoms to form a mixture of distorted face and edge-sharing LaSi8 hexagonal bipyramids. Si(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1), four equivalent La(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_La(MgSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.316
_cell_length_b   4.316
_cell_length_c   5.814
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   108.328
_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  0.000  0.000  1.0
  Mg  Mg1  1  0.000  0.500  0.500  1.0
  Mg  Mg2  1  0.500  0.000  0.500  1.0
  Si  Si3  1  0.500  0.500  0.199  1.0
  Si  Si4  1  0.500  0.500  0.801  1.0
[/CIF]
.
The material structure described by La(MgSi)2 crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. La(1) is bonded to eight equivalent Si(1) atoms to form a mixture of distorted face and edge-sharing LaSi8 hexagonal bipyramids. Si(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1), four equivalent La(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_La(MgSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.316
_cell_length_b   4.316
_cell_length_c   5.814
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   108.328
_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  0.000  0.000  1.0
  Mg  Mg1  1  0.000  0.500  0.500  1.0
  Mg  Mg2  1  0.500  0.000  0.500  1.0
  Si  Si3  1  0.500  0.500  0.199  1.0
  Si  Si4  1  0.500  0.500  0.801  1.0
[/CIF]
.