Materials Data on Nb4CoPt3 by Materials Project

Abstract

Nb4CoPt3 crystallizes in the orthorhombic Pmm2 space group. The structure is three-dimensional. there are four inequivalent Nb sites. In the first Nb site, Nb is bonded in a 12-coordinate geometry to two equivalent Co and six Pt atoms. Both Nb–Co bond lengths are 2.78 Å. There are four shorter (2.78 Å) and two longer (2.97 Å) Nb–Pt bond lengths. In the second Nb site, Nb is bonded to four Nb, two equivalent Co, and six Pt atoms to form distorted NbNb4Co2Pt6 cuboctahedra that share corners with four equivalent CoNb8Co2Pt2 cuboctahedra, corners with four equivalent PtNb8Pt4 cuboctahedra, corners with six equivalent NbNb4Co2Pt6 cuboctahedra, edges with two equivalent CoNb8Co2Pt2 cuboctahedra, edges with ten PtNb8Pt4 cuboctahedra, faces with two equivalent CoNb8Co2Pt2 cuboctahedra, faces with six PtNb8Pt4 cuboctahedra, and faces with ten NbNb4Co2Pt6 cuboctahedra. There are two shorter (2.82 Å) and two longer (2.92 Å) Nb–Nb bond lengths. Both Nb–Co bond lengths are 2.78 Å. There are four shorter (2.82 Å) and two longer (2.92 Å) Nb–Pt bond lengths. In the third Nb site, Nb is bonded to two equivalent Nb, four equivalent Co, and four Pt atoms to form distorted NbNb2Co4Pt4 cuboctahedra that share corners with four equivalent NbNb2Co4Pt4 cuboctahedra, corners with four equivalent CoNb8Co2Pt2 cuboctahedra, corners with twelve PtNb8Co2Pt2 cuboctahedra, edges with four equivalent PtNb8Pt4 cuboctahedra, faces with four equivalent CoNb8Co2Pt2 cuboctahedra, faces with four PtNb8Co2Pt2 cuboctahedra, and faces with ten NbNb4Co2Pt6 cuboctahedra. All Nb–Co bond lengths are 2.78 Å. There are two shorter (2.75 Å) and two longer (2.94 Å) Nb–Pt bond lengths. In the fourth Nb site, Nb is bonded in a 12-coordinate geometry to eight Pt atoms. There are a spread of Nb–Pt bond distances ranging from 2.81–2.89 Å. Co is bonded to eight Nb, two equivalent Co, and two equivalent Pt atoms to form distorted CoNb8Co2Pt2 cuboctahedra that share corners with four equivalent PtNb8Pt4 cuboctahedra, corners with six equivalent CoNb8Co2Pt2 cuboctahedra, corners with eight NbNb4Co2Pt6 cuboctahedra, edges with two equivalent NbNb4Co2Pt6 cuboctahedra, edges with six PtNb8Pt4 cuboctahedra, faces with four equivalent CoNb8Co2Pt2 cuboctahedra, faces with six NbNb4Co2Pt6 cuboctahedra, and faces with eight PtNb8Co2Pt2 cuboctahedra. Both Co–Co bond lengths are 2.82 Å. Both Co–Pt bond lengths are 2.90 Å. There are three inequivalent Pt sites. In the first Pt site, Pt is bonded to eight Nb and four Pt atoms to form distorted PtNb8Pt4 cuboctahedra that share corners with four equivalent NbNb4Co2Pt6 cuboctahedra, corners with four equivalent CoNb8Co2Pt2 cuboctahedra, corners with six equivalent PtNb8Pt4 cuboctahedra, edges with two equivalent CoNb8Co2Pt2 cuboctahedra, edges with four equivalent PtNb8Co2Pt2 cuboctahedra, edges with six NbNb4Co2Pt6 cuboctahedra, faces with two equivalent NbNb4Co2Pt6 cuboctahedra, and faces with twelve PtNb8Pt4 cuboctahedra. There are two shorter (2.82 Å) and two longer (2.90 Å) Pt–Pt bond lengths. In the second Pt site, Pt is bonded to eight Nb, two equivalent Co, and two equivalent Pt atoms to form distorted PtNb8Co2Pt2 cuboctahedra that share corners with six equivalent NbNb2Co4Pt4 cuboctahedra, corners with ten PtNb8Co2Pt2 cuboctahedra, edges with four equivalent NbNb4Co2Pt6 cuboctahedra, edges with six PtNb8Pt4 cuboctahedra, faces with two equivalent NbNb2Co4Pt4 cuboctahedra, faces with six equivalent CoNb8Co2Pt2 cuboctahedra, and faces with six PtNb8Pt4 cuboctahedra. Both Pt–Pt bond lengths are 2.82 Å. In the third Pt site, Pt is bonded to eight Nb and four Pt atoms to form distorted PtNb8Pt4 cuboctahedra that share corners with six equivalent NbNb2Co4Pt4 cuboctahedra, corners with ten PtNb8Co2Pt2 cuboctahedra, edges with two equivalent PtNb8Co2Pt2 cuboctahedra, edges with four equivalent NbNb4Co2Pt6 cuboctahedra, edges with four equivalent CoNb8Co2Pt2 cuboctahedra, faces with two equivalent CoNb8Co2Pt2 cuboctahedra, faces with six NbNb4Co2Pt6 cuboctahedra, and faces with ten PtNb8Pt4 cuboctahedra. Both Pt–Pt bond lengths are 2.82 Å.