Materials Data on UIr by Materials Project

Abstract

UIr crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are four inequivalent U sites. In the first U site, U is bonded in a 7-coordinate geometry to seven Ir atoms. There are a spread of U–Ir bond distances ranging from 2.77–3.06 Å. In the second U site, U is bonded in a 5-coordinate geometry to seven Ir atoms. There are a spread of U–Ir bond distances ranging from 2.79–3.27 Å. In the third U site, U is bonded in a 7-coordinate geometry to seven Ir atoms. There are a spread of U–Ir bond distances ranging from 2.77–3.05 Å. In the fourth U site, U is bonded in a 5-coordinate geometry to seven Ir atoms. There are a spread of U–Ir bond distances ranging from 2.80–3.26 Å. There are four inequivalent Ir sites. In the first Ir site, Ir is bonded in a 7-coordinate geometry to seven U and two Ir atoms. There are one shorter (3.08 Å) and one longer (3.18 Å) Ir–Ir bond lengths. In the second Ir site, Ir is bonded in a 5-coordinate geometry to seven U and three Ir atoms. There are one shorter (2.98 Å) and one longer (3.07 Å) Ir–Ir bond lengths. In the third Ir site, Ir is bonded in a 7-coordinate geometry to seven U and two Ir atoms. The Ir–Ir bond length is 3.20 Å. In the fourth Ir site, Ir is bonded in a 5-coordinate geometry to seven U and three Ir atoms.