Materials Data on La2Ge4IrRh3 by Materials Project

Dataset · Sun May 03 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1705996· OSTI ID:1705996

La2IrRh3Ge4 crystallizes in the tetragonal P-4m2 space group. The structure is three-dimensional. La is bonded in a 8-coordinate geometry to two equivalent Ir, six Rh, and eight Ge atoms. Both La–Ir bond lengths are 3.40 Å. All La–Rh bond lengths are 3.40 Å. There are four shorter (3.27 Å) and four longer (3.28 Å) La–Ge bond lengths. Ir is bonded to four equivalent La and four equivalent Ge atoms to form distorted IrLa4Ge4 tetrahedra that share corners with twelve RhLa4Ge4 tetrahedra, edges with two equivalent RhLa4Ge4 tetrahedra, edges with four equivalent IrLa4Ge4 tetrahedra, and faces with four equivalent RhLa4Ge4 tetrahedra. All Ir–Ge bond lengths are 2.49 Å. There are three inequivalent Rh sites. In the first Rh site, Rh is bonded to four equivalent La and four equivalent Ge atoms to form distorted RhLa4Ge4 tetrahedra that share corners with four equivalent RhLa4Ge4 tetrahedra, corners with eight equivalent IrLa4Ge4 tetrahedra, edges with six RhLa4Ge4 tetrahedra, and faces with four equivalent RhLa4Ge4 tetrahedra. All Rh–Ge bond lengths are 2.49 Å. In the second Rh site, Rh is bonded to four equivalent La and four equivalent Ge atoms to form distorted RhLa4Ge4 tetrahedra that share corners with twelve RhLa4Ge4 tetrahedra, edges with six RhLa4Ge4 tetrahedra, and faces with four equivalent IrLa4Ge4 tetrahedra. All Rh–Ge bond lengths are 2.49 Å. In the third Rh site, Rh is bonded to four equivalent La and four equivalent Ge atoms to form distorted RhLa4Ge4 tetrahedra that share corners with four equivalent IrLa4Ge4 tetrahedra, corners with eight equivalent RhLa4Ge4 tetrahedra, edges with two equivalent IrLa4Ge4 tetrahedra, edges with four equivalent RhLa4Ge4 tetrahedra, and faces with four equivalent RhLa4Ge4 tetrahedra. All Rh–Ge bond lengths are 2.49 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to four equivalent La, two equivalent Ir, two equivalent Rh, and one Ge atom. The Ge–Ge bond length is 2.68 Å. In the second Ge site, Ge is bonded in a 9-coordinate geometry to four equivalent La, four Rh, and one Ge atom.

• Research Organization: LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Contributing Organization: The Materials Project; MIT; UC Berkeley; Duke; U Louvain
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1705996
• Report Number(s): mp-1223229
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Ge-Ir-La-Rh
La2Ge4IrRh3
crystal structure