DOE OSTI2020
Tb3Rh3Ga8 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are two inequivalent Tb sites. In the first Tb site, Tb is bonded to four equivalent Rh and twelve Ga atoms to form distorted face-sharing TbGa12Rh4 cuboctahedra. All Tb–Rh bond lengths are 3.51 Å. There are four shorter (3.19 Å) and eight longer (3.22 Å) Tb–Ga bond lengths. In the second Tb site, Tb is bonded in a 12-coordinate geometry to four Rh and eight Ga atoms. There are two shorter (3.01 Å) and two longer (3.03 Å) Tb–Rh bond lengths. There are four shorter (3.07 Å) and four longer (3.17 Å) Tb–Ga bond lengths. There are two inequivalent Rh sites. In the first Rh site, Rh is bonded in a 8-coordinate geometry to four equivalent Tb and four equivalent Ga atoms. All Rh–Ga bond lengths are 2.63 Å. In the second Rh site, Rh is bonded in a 12-coordinate geometry to four Tb and six Ga atoms. There are two shorter (2.55 Å) and four longer (2.61 Å) Rh–Ga bond lengths. There are two inequivalent Ga sites. In the first Ga site, Ga is bonded in a 9-coordinate geometry to three Tb, three Rh, and three equivalent Ga atoms. There are two shorter (2.66 Å) and one longer (2.73 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded in a 1-coordinate geometry to four Tb, one Rh, and four Ga atoms. The Ga–Ga bond length is 2.57 Å.