Materials Data on Th2(FeNi)5 by Materials Project

Abstract

Th2(FeNi)5 crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. there are two inequivalent Th sites. In the first Th site, Th is bonded in a 6-coordinate geometry to six Fe and twelve Ni atoms. There are four shorter (2.91 Å) and two longer (2.92 Å) Th–Fe bond lengths. There are eight shorter (3.20 Å) and four longer (3.22 Å) Th–Ni bond lengths. In the second Th site, Th is bonded in a 6-coordinate geometry to ten Fe and eight equivalent Ni atoms. There are a spread of Th–Fe bond distances ranging from 2.87–3.22 Å. All Th–Ni bond lengths are 3.20 Å. There are three inequivalent Fe sites. In the first Fe site, Fe is bonded in a 12-coordinate geometry to three Th, two equivalent Fe, and four equivalent Ni atoms. Both Fe–Fe bond lengths are 2.44 Å. All Fe–Ni bond lengths are 2.49 Å. In the second Fe site, Fe is bonded in a 12-coordinate geometry to three Th and six Ni atoms. There are four shorter (2.46 Å) and two longer (2.47 Å) Fe–Ni bond lengths. In the third Fe site, Fe is bonded to four equivalent Th, four equivalent Fe, and four equivalent Ni atoms to form distorted FeTh4Fe4Ni4 cuboctahedra that share corners with four equivalent FeTh4Fe4Ni4 cuboctahedra, corners with twelve NiTh4Fe5Ni3 cuboctahedra, edges with two equivalent FeTh4Fe4Ni4 cuboctahedra, edges with eight equivalent NiTh4Fe5Ni3 cuboctahedra, faces with two equivalent FeTh4Fe4Ni4 cuboctahedra, and faces with eight equivalent NiTh4Fe5Ni3 cuboctahedra. All Fe–Ni bond lengths are 2.51 Å. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded to four equivalent Th, four equivalent Fe, and four equivalent Ni atoms to form distorted NiTh4Fe4Ni4 cuboctahedra that share corners with four equivalent FeTh4Fe4Ni4 cuboctahedra, corners with twelve NiTh4Fe5Ni3 cuboctahedra, edges with ten NiTh4Fe5Ni3 cuboctahedra, and faces with ten NiTh4Fe4Ni4 cuboctahedra. All Ni–Ni bond lengths are 2.49 Å. In the second Ni site, Ni is bonded to four Th, five Fe, and three Ni atoms to form distorted NiTh4Fe5Ni3 cuboctahedra that share corners with two equivalent FeTh4Fe4Ni4 cuboctahedra, corners with fourteen NiTh4Fe4Ni4 cuboctahedra, edges with two equivalent FeTh4Fe4Ni4 cuboctahedra, edges with eight NiTh4Fe4Ni4 cuboctahedra, faces with two equivalent FeTh4Fe4Ni4 cuboctahedra, and faces with eight NiTh4Fe4Ni4 cuboctahedra. There are one shorter (2.50 Å) and one longer (2.54 Å) Ni–Ni bond lengths.