LaIr2As2 crystallizes in the tetragonal P4/nmm space group. La(1) is bonded in a 16-coordinate geometry to four equivalent Ir(1), four equivalent Ir(2), four equivalent As(1), and four equivalent As(2) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent As(2) atoms. In the second Ir site, Ir(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one As(2), and four equivalent As(1) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Ir(2) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one Ir(2), and four equivalent Ir(1) atoms.
LaIr2As2 crystallizes in the tetragonal P4/nmm space group. La(1) is bonded in a 16-coordinate geometry to four equivalent Ir(1), four equivalent Ir(2), four equivalent As(1), and four equivalent As(2) atoms. All La(1)-Ir(1) bond lengths are 3.33 Å. All La(1)-Ir(2) bond lengths are 3.32 Å. All La(1)-As(1) bond lengths are 3.29 Å. All La(1)-As(2) bond lengths are 3.26 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent As(2) atoms. All Ir(1)-As(2) bond lengths are 2.57 Å. In the second Ir site, Ir(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one As(2), and four equivalent As(1) atoms. The Ir(2)-As(2) bond length is 2.45 Å. All Ir(2)-As(1) bond lengths are 2.45 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Ir(2) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one Ir(2), and four equivalent Ir(1) atoms.