Materials Data on Y2Ga2Co15 by Materials Project

Abstract

Y2Co15Ga2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Y sites. In the first Y site, Y is bonded in a 12-coordinate geometry to eighteen Co atoms. There are a spread of Y–Co bond distances ranging from 2.94–3.25 Å. In the second Y site, Y is bonded in a 2-coordinate geometry to eighteen Co and two equivalent Ga atoms. There are a spread of Y–Co bond distances ranging from 3.01–3.16 Å. Both Y–Ga bond lengths are 2.83 Å. There are seven inequivalent Co sites. In the first Co site, Co is bonded to three Y, eight Co, and one Ga atom to form a mixture of distorted face, edge, and corner-sharing CoY3GaCo8 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.37–2.55 Å. The Co–Ga bond length is 2.66 Å. In the second Co site, Co is bonded to three Y, eight Co, and one Ga atom to form a mixture of distorted face, edge, and corner-sharing CoY3GaCo8 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.45–2.56 Å. The Co–Ga bond length is 2.66 Å. In the third Co site, Co is bonded to two equivalent Y, eight Co, and two equivalent Ga atoms to form CoY2Ga2Co8 cuboctahedra that share corners with twenty-two CoY3GaCo8 cuboctahedra, edges with ten CoY2Ga2Co8 cuboctahedra, and faces with eighteen CoY3GaCo8 cuboctahedra. All Co–Co bond lengths are 2.42 Å. Both Co–Ga bond lengths are 2.53 Å. In the fourth Co site, Co is bonded to two equivalent Y, eight Co, and two equivalent Ga atoms to form a mixture of face, edge, and corner-sharing CoY2Ga2Co8 cuboctahedra. All Co–Co bond lengths are 2.42 Å. Both Co–Ga bond lengths are 2.54 Å. In the fifth Co site, Co is bonded to two Y, eight Co, and two equivalent Ga atoms to form distorted CoY2Ga2Co8 cuboctahedra that share corners with twenty-four CoY3GaCo8 cuboctahedra, edges with five CoY2Ga2Co8 cuboctahedra, and faces with twenty-one CoY3GaCo8 cuboctahedra. There are one shorter (2.35 Å) and one longer (2.50 Å) Co–Co bond lengths. Both Co–Ga bond lengths are 2.73 Å. In the sixth Co site, Co is bonded to two Y, eight Co, and two equivalent Ga atoms to form distorted CoY2Ga2Co8 cuboctahedra that share corners with twenty-four CoY3GaCo8 cuboctahedra, edges with five CoY2Ga2Co8 cuboctahedra, and faces with twenty-one CoY3GaCo8 cuboctahedra. There are one shorter (2.34 Å) and one longer (2.50 Å) Co–Co bond lengths. Both Co–Ga bond lengths are 2.73 Å. In the seventh Co site, Co is bonded to two Y, eight Co, and two equivalent Ga atoms to form distorted CoY2Ga2Co8 cuboctahedra that share corners with twenty-four CoY3GaCo8 cuboctahedra, edges with five CoY2Ga2Co8 cuboctahedra, and faces with twenty-one CoY3GaCo8 cuboctahedra. Both Co–Ga bond lengths are 2.73 Å. Ga is bonded in a 4-coordinate geometry to one Y, twelve Co, and one Ga atom. The Ga–Ga bond length is 2.51 Å.