Materials Data on LaAsIr by Materials Project
LaIrAs is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. The structure is three-dimensional. La is bonded to six Ir and six equivalent As atoms to form a mixture of edge and face-sharing LaAs6Ir6 cuboctahedra. There are two shorter (3.22 Å) and four longer (3.28 Å) La–Ir bond lengths. There are four shorter (3.21 Å) and two longer (3.35 Å) La–As bond lengths. There are three inequivalent Ir sites. In the first Ir site, Ir is bonded in a 9-coordinate geometry to six equivalent La and three equivalent As atoms. There are two shorter (2.47 Å) and one longer (2.48 Å) Ir–As bond lengths. In the second Ir site, Ir is bonded in a 9-coordinate geometry to six equivalent La and three equivalent As atoms. There are two shorter (2.47 Å) and one longer (2.48 Å) Ir–As bond lengths. In the third Ir site, Ir is bonded in a 9-coordinate geometry to six equivalent La and three equivalent As atoms. There are two shorter (3.22 Å) and four longer (3.28 Å) Ir–La bond lengths. There are two shorter (2.47 Å) and one longer (2.48 Å) Ir–As bond lengths. As is bonded in a 9-coordinate geometry to six equivalent La and three Ir atoms.