The compound described by LaCo4Al crystallizes in the hexagonal P-6m2 space group. La(1) is bonded in a 18-coordinate geometry to three equivalent Co(1), twelve equivalent Co(2), and three equivalent Al(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent La(1), six equivalent Co(2), and three equivalent Al(1) atoms to form distorted CoLa3Al3Co6 cuboctahedra that share corners with twelve equivalent Co(2)La4Al2Co6 cuboctahedra, edges with six equivalent Co(1)La3Al3Co6 cuboctahedra, faces with two equivalent Co(1)La3Al3Co6 cuboctahedra, and faces with eighteen equivalent Co(2)La4Al2Co6 cuboctahedra. In the second Co site, Co(2) is bonded to four equivalent La(1), two equivalent Co(1), four equivalent Co(2), and two equivalent Al(1) atoms to form distorted CoLa4Al2Co6 cuboctahedra that share corners with four equivalent Co(1)La3Al3Co6 cuboctahedra, corners with sixteen equivalent Co(2)La4Al2Co6 cuboctahedra, edges with ten equivalent Co(2)La4Al2Co6 cuboctahedra, faces with six equivalent Co(1)La3Al3Co6 cuboctahedra, and faces with ten equivalent Co(2)La4Al2Co6 cuboctahedra. Al(1) is bonded in a 12-coordinate geometry to three equivalent La(1), three equivalent Co(1), and six equivalent Co(2) atoms. is represented by the CIF card [CIF]
data_LaAlCo4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.232
_cell_length_b   5.232
_cell_length_c   3.837
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   90.942
_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  0.667  0.333  0.000  1.0
  Al  Al1  1  0.000  0.000  0.000  1.0
  Co  Co2  1  0.333  0.667  0.000  1.0
  Co  Co3  1  0.659  0.830  0.500  1.0
  Co  Co4  1  0.170  0.830  0.500  1.0
  Co  Co5  1  0.170  0.341  0.500  1.0
[/CIF]
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The compound described by LaCo4Al crystallizes in the hexagonal P-6m2 space group. La(1) is bonded in a 18-coordinate geometry to three equivalent Co(1), twelve equivalent Co(2), and three equivalent Al(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent La(1), six equivalent Co(2), and three equivalent Al(1) atoms to form distorted CoLa3Al3Co6 cuboctahedra that share corners with twelve equivalent Co(2)La4Al2Co6 cuboctahedra, edges with six equivalent Co(1)La3Al3Co6 cuboctahedra, faces with two equivalent Co(1)La3Al3Co6 cuboctahedra, and faces with eighteen equivalent Co(2)La4Al2Co6 cuboctahedra. In the second Co site, Co(2) is bonded to four equivalent La(1), two equivalent Co(1), four equivalent Co(2), and two equivalent Al(1) atoms to form distorted CoLa4Al2Co6 cuboctahedra that share corners with four equivalent Co(1)La3Al3Co6 cuboctahedra, corners with sixteen equivalent Co(2)La4Al2Co6 cuboctahedra, edges with ten equivalent Co(2)La4Al2Co6 cuboctahedra, faces with six equivalent Co(1)La3Al3Co6 cuboctahedra, and faces with ten equivalent Co(2)La4Al2Co6 cuboctahedra. Al(1) is bonded in a 12-coordinate geometry to three equivalent La(1), three equivalent Co(1), and six equivalent Co(2) atoms. is represented by the CIF card [CIF]
data_LaAlCo4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.232
_cell_length_b   5.232
_cell_length_c   3.837
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   90.942
_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  0.667  0.333  0.000  1.0
  Al  Al1  1  0.000  0.000  0.000  1.0
  Co  Co2  1  0.333  0.667  0.000  1.0
  Co  Co3  1  0.659  0.830  0.500  1.0
  Co  Co4  1  0.170  0.830  0.500  1.0
  Co  Co5  1  0.170  0.341  0.500  1.0
[/CIF]
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