Materials Data on UAlIr by Materials Project

Abstract

UIrAl crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. U is bonded in a 5-coordinate geometry to five Ir atoms. There are one shorter (2.91 Å) and four longer (2.92 Å) U–Ir bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 9-coordinate geometry to three equivalent U and six equivalent Al atoms. All Ir–Al bond lengths are 2.63 Å. In the second Ir site, Ir is bonded in a 9-coordinate geometry to six equivalent U and three equivalent Al atoms. All Ir–Al bond lengths are 2.70 Å. Al is bonded to four Ir atoms to form a mixture of distorted edge and corner-sharing AlIr4 tetrahedra.