The material described by La2Ir7 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 12-coordinate geometry to three equivalent Ir(1) and nine equivalent Ir(3) atoms. In the second La site, La(2) is bonded in a 18-coordinate geometry to three equivalent Ir(4), three equivalent Ir(5), six equivalent Ir(2), and six equivalent Ir(3) atoms. There are five inequivalent Ir sites. In the first Ir site, Ir(5) is bonded in a 9-coordinate geometry to three equivalent La(2), three equivalent Ir(2), and three equivalent Ir(3) atoms. In the second Ir site, Ir(1) is bonded to six equivalent La(1) and six equivalent Ir(3) atoms to form IrLa6Ir6 cuboctahedra that share corners with twelve equivalent Ir(3)La5Ir7 cuboctahedra, edges with six equivalent Ir(1)La6Ir6 cuboctahedra, and faces with eighteen equivalent Ir(3)La5Ir7 cuboctahedra. In the third Ir site, Ir(2) is bonded to four equivalent La(2), two equivalent Ir(4), two equivalent Ir(5), and four equivalent Ir(2) atoms to form IrLa4Ir8 cuboctahedra that share corners with four equivalent Ir(2)La4Ir8 cuboctahedra, corners with twelve equivalent Ir(3)La5Ir7 cuboctahedra, edges with two equivalent Ir(2)La4Ir8 cuboctahedra, edges with eight equivalent Ir(3)La5Ir7 cuboctahedra, faces with two equivalent Ir(3)La5Ir7 cuboctahedra, and faces with eight equivalent Ir(2)La4Ir8 cuboctahedra. In the fourth Ir site, Ir(3) is bonded to two equivalent La(2), three equivalent La(1), one Ir(1), one Ir(4), one Ir(5), and four equivalent Ir(3) atoms to form distorted IrLa5Ir7 cuboctahedra that share corners with two equivalent Ir(1)La6Ir6 cuboctahedra, corners with six equivalent Ir(2)La4Ir8 cuboctahedra, corners with nine equivalent Ir(3)La5Ir7 cuboctahedra, edges with four equivalent Ir(2)La4Ir8 cuboctahedra, edges with four equivalent Ir(3)La5Ir7 cuboctahedra,  a faceface with one Ir(2)La4Ir8 cuboctahedra, faces with three equivalent Ir(1)La6Ir6 cuboctahedra, and faces with ten equivalent Ir(3)La5Ir7 cuboctahedra. In the fifth Ir site, Ir(4) is bonded in a 9-coordinate geometry to three equivalent La(2), three equivalent Ir(2), and three equivalent Ir(3) atoms. is represented by the CIF card [CIF]
data_La2Ir7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.376
_cell_length_b   5.376
_cell_length_c   26.388
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   660.596
_cell_formula_units_Z   4
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  0.333  0.667  0.471  1.0
  La  La1  1  0.667  0.333  0.529  1.0
  La  La2  1  0.667  0.333  0.971  1.0
  La  La3  1  0.333  0.667  0.029  1.0
  La  La4  1  0.333  0.667  0.326  1.0
  La  La5  1  0.667  0.333  0.674  1.0
  La  La6  1  0.667  0.333  0.826  1.0
  La  La7  1  0.333  0.667  0.174  1.0
  Ir  Ir8  1  0.000  0.000  0.500  1.0
  Ir  Ir9  1  0.000  0.000  0.000  1.0
  Ir  Ir10  1  0.832  0.168  0.250  1.0
  Ir  Ir11  1  0.832  0.664  0.250  1.0
  Ir  Ir12  1  0.336  0.168  0.250  1.0
  Ir  Ir13  1  0.168  0.832  0.750  1.0
  Ir  Ir14  1  0.168  0.336  0.750  1.0
  Ir  Ir15  1  0.664  0.832  0.750  1.0
  Ir  Ir16  1  0.835  0.165  0.413  1.0
  Ir  Ir17  1  0.835  0.670  0.413  1.0
  Ir  Ir18  1  0.330  0.165  0.413  1.0
  Ir  Ir19  1  0.165  0.835  0.587  1.0
  Ir  Ir20  1  0.165  0.330  0.587  1.0
  Ir  Ir21  1  0.670  0.835  0.587  1.0
  Ir  Ir22  1  0.165  0.835  0.913  1.0
  Ir  Ir23  1  0.165  0.330  0.913  1.0
  Ir  Ir24  1  0.670  0.835  0.913  1.0
  Ir  Ir25  1  0.835  0.165  0.087  1.0
  Ir  Ir26  1  0.835  0.670  0.087  1.0
  Ir  Ir27  1  0.330  0.165  0.087  1.0
  Ir  Ir28  1  0.000  0.000  0.332  1.0
  Ir  Ir29  1  0.000  0.000  0.668  1.0
  Ir  Ir30  1  0.000  0.000  0.832  1.0
  Ir  Ir31  1  0.000  0.000  0.168  1.0
  Ir  Ir32  1  0.333  0.667  0.666  1.0
  Ir  Ir33  1  0.667  0.333  0.334  1.0
  Ir  Ir34  1  0.667  0.333  0.166  1.0
  Ir  Ir35  1  0.333  0.667  0.834  1.0
[/CIF]
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The material described by La2Ir7 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 12-coordinate geometry to three equivalent Ir(1) and nine equivalent Ir(3) atoms. In the second La site, La(2) is bonded in a 18-coordinate geometry to three equivalent Ir(4), three equivalent Ir(5), six equivalent Ir(2), and six equivalent Ir(3) atoms. There are five inequivalent Ir sites. In the first Ir site, Ir(5) is bonded in a 9-coordinate geometry to three equivalent La(2), three equivalent Ir(2), and three equivalent Ir(3) atoms. In the second Ir site, Ir(1) is bonded to six equivalent La(1) and six equivalent Ir(3) atoms to form IrLa6Ir6 cuboctahedra that share corners with twelve equivalent Ir(3)La5Ir7 cuboctahedra, edges with six equivalent Ir(1)La6Ir6 cuboctahedra, and faces with eighteen equivalent Ir(3)La5Ir7 cuboctahedra. In the third Ir site, Ir(2) is bonded to four equivalent La(2), two equivalent Ir(4), two equivalent Ir(5), and four equivalent Ir(2) atoms to form IrLa4Ir8 cuboctahedra that share corners with four equivalent Ir(2)La4Ir8 cuboctahedra, corners with twelve equivalent Ir(3)La5Ir7 cuboctahedra, edges with two equivalent Ir(2)La4Ir8 cuboctahedra, edges with eight equivalent Ir(3)La5Ir7 cuboctahedra, faces with two equivalent Ir(3)La5Ir7 cuboctahedra, and faces with eight equivalent Ir(2)La4Ir8 cuboctahedra. In the fourth Ir site, Ir(3) is bonded to two equivalent La(2), three equivalent La(1), one Ir(1), one Ir(4), one Ir(5), and four equivalent Ir(3) atoms to form distorted IrLa5Ir7 cuboctahedra that share corners with two equivalent Ir(1)La6Ir6 cuboctahedra, corners with six equivalent Ir(2)La4Ir8 cuboctahedra, corners with nine equivalent Ir(3)La5Ir7 cuboctahedra, edges with four equivalent Ir(2)La4Ir8 cuboctahedra, edges with four equivalent Ir(3)La5Ir7 cuboctahedra,  a faceface with one Ir(2)La4Ir8 cuboctahedra, faces with three equivalent Ir(1)La6Ir6 cuboctahedra, and faces with ten equivalent Ir(3)La5Ir7 cuboctahedra. In the fifth Ir site, Ir(4) is bonded in a 9-coordinate geometry to three equivalent La(2), three equivalent Ir(2), and three equivalent Ir(3) atoms. is represented by the CIF card [CIF]
data_La2Ir7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.376
_cell_length_b   5.376
_cell_length_c   26.388
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   660.596
_cell_formula_units_Z   4
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  0.333  0.667  0.471  1.0
  La  La1  1  0.667  0.333  0.529  1.0
  La  La2  1  0.667  0.333  0.971  1.0
  La  La3  1  0.333  0.667  0.029  1.0
  La  La4  1  0.333  0.667  0.326  1.0
  La  La5  1  0.667  0.333  0.674  1.0
  La  La6  1  0.667  0.333  0.826  1.0
  La  La7  1  0.333  0.667  0.174  1.0
  Ir  Ir8  1  0.000  0.000  0.500  1.0
  Ir  Ir9  1  0.000  0.000  0.000  1.0
  Ir  Ir10  1  0.832  0.168  0.250  1.0
  Ir  Ir11  1  0.832  0.664  0.250  1.0
  Ir  Ir12  1  0.336  0.168  0.250  1.0
  Ir  Ir13  1  0.168  0.832  0.750  1.0
  Ir  Ir14  1  0.168  0.336  0.750  1.0
  Ir  Ir15  1  0.664  0.832  0.750  1.0
  Ir  Ir16  1  0.835  0.165  0.413  1.0
  Ir  Ir17  1  0.835  0.670  0.413  1.0
  Ir  Ir18  1  0.330  0.165  0.413  1.0
  Ir  Ir19  1  0.165  0.835  0.587  1.0
  Ir  Ir20  1  0.165  0.330  0.587  1.0
  Ir  Ir21  1  0.670  0.835  0.587  1.0
  Ir  Ir22  1  0.165  0.835  0.913  1.0
  Ir  Ir23  1  0.165  0.330  0.913  1.0
  Ir  Ir24  1  0.670  0.835  0.913  1.0
  Ir  Ir25  1  0.835  0.165  0.087  1.0
  Ir  Ir26  1  0.835  0.670  0.087  1.0
  Ir  Ir27  1  0.330  0.165  0.087  1.0
  Ir  Ir28  1  0.000  0.000  0.332  1.0
  Ir  Ir29  1  0.000  0.000  0.668  1.0
  Ir  Ir30  1  0.000  0.000  0.832  1.0
  Ir  Ir31  1  0.000  0.000  0.168  1.0
  Ir  Ir32  1  0.333  0.667  0.666  1.0
  Ir  Ir33  1  0.667  0.333  0.334  1.0
  Ir  Ir34  1  0.667  0.333  0.166  1.0
  Ir  Ir35  1  0.333  0.667  0.834  1.0
[/CIF]
.