The structure described by MgLa5 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 10-coordinate geometry to one La(4), two equivalent La(1), two equivalent La(3), two equivalent La(5), and three equivalent La(2) atoms. There are five inequivalent La sites. In the first La site, La(1) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent La(4), and three equivalent La(5) atoms. In the second La site, La(2) is bonded in a 2-coordinate geometry to three equivalent Mg(1), one La(5), and two equivalent La(4) atoms. In the third La site, La(3) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent La(5), and three equivalent La(4) atoms. In the fourth La site, La(4) is bonded to one Mg(1), two equivalent La(1), two equivalent La(2), two equivalent La(4), two equivalent La(5), and three equivalent La(3) atoms to form LaLa11Mg cuboctahedra that share corners with six equivalent La(4)La11Mg cuboctahedra, edges with six equivalent La(5)La10Mg2 cuboctahedra, faces with two equivalent La(4)La11Mg cuboctahedra, and faces with three equivalent La(5)La10Mg2 cuboctahedra. In the fifth La site, La(5) is bonded to two equivalent Mg(1), one La(2), two equivalent La(3), two equivalent La(4), two equivalent La(5), and three equivalent La(1) atoms to form distorted LaLa10Mg2 cuboctahedra that share corners with six equivalent La(5)La10Mg2 cuboctahedra, edges with six equivalent La(4)La11Mg cuboctahedra, faces with two equivalent La(5)La10Mg2 cuboctahedra, and faces with three equivalent La(4)La11Mg cuboctahedra. is represented by the CIF file [CIF]
data_La5Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.795
_cell_length_b   6.795
_cell_length_c   8.885
_cell_angle_alpha   73.236
_cell_angle_beta   73.236
_cell_angle_gamma   32.435
_symmetry_Int_Tables_number   1
_cell_volume   209.867
_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  0.005  0.005  0.037  1.0
  La  La1  1  0.314  0.314  0.333  1.0
  La  La2  1  0.951  0.951  0.574  1.0
  La  La3  1  0.663  0.663  0.684  1.0
  La  La4  1  0.285  0.285  0.934  1.0
  Mg  Mg5  1  0.614  0.614  0.272  1.0
[/CIF]
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The structure described by MgLa5 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 10-coordinate geometry to one La(4), two equivalent La(1), two equivalent La(3), two equivalent La(5), and three equivalent La(2) atoms. There are five inequivalent La sites. In the first La site, La(1) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent La(4), and three equivalent La(5) atoms. In the second La site, La(2) is bonded in a 2-coordinate geometry to three equivalent Mg(1), one La(5), and two equivalent La(4) atoms. In the third La site, La(3) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent La(5), and three equivalent La(4) atoms. In the fourth La site, La(4) is bonded to one Mg(1), two equivalent La(1), two equivalent La(2), two equivalent La(4), two equivalent La(5), and three equivalent La(3) atoms to form LaLa11Mg cuboctahedra that share corners with six equivalent La(4)La11Mg cuboctahedra, edges with six equivalent La(5)La10Mg2 cuboctahedra, faces with two equivalent La(4)La11Mg cuboctahedra, and faces with three equivalent La(5)La10Mg2 cuboctahedra. In the fifth La site, La(5) is bonded to two equivalent Mg(1), one La(2), two equivalent La(3), two equivalent La(4), two equivalent La(5), and three equivalent La(1) atoms to form distorted LaLa10Mg2 cuboctahedra that share corners with six equivalent La(5)La10Mg2 cuboctahedra, edges with six equivalent La(4)La11Mg cuboctahedra, faces with two equivalent La(5)La10Mg2 cuboctahedra, and faces with three equivalent La(4)La11Mg cuboctahedra. is represented by the CIF file [CIF]
data_La5Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.795
_cell_length_b   6.795
_cell_length_c   8.885
_cell_angle_alpha   73.236
_cell_angle_beta   73.236
_cell_angle_gamma   32.435
_symmetry_Int_Tables_number   1
_cell_volume   209.867
_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  0.005  0.005  0.037  1.0
  La  La1  1  0.314  0.314  0.333  1.0
  La  La2  1  0.951  0.951  0.574  1.0
  La  La3  1  0.663  0.663  0.684  1.0
  La  La4  1  0.285  0.285  0.934  1.0
  Mg  Mg5  1  0.614  0.614  0.272  1.0
[/CIF]
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