The lanthanum-rhodium system.
La-Rh system study by powder X ray diffraction, metallographic and differential thermal analysis, constructing equilibrium diagram and determining crystal structure data
Raman, A.↗
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The anti-Th3P4-type structure in the lanthanum-rhodium system - La4Rh sub approximately 3
Thorium phosphide anti-type microstructure of La-Rh system by X ray diffraction, discussing bcc structure, lattice constants, etc
Raman, A.↗
Materials Data on LaRh2 by Materials Project
LaRh2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. La is bonded in a 12-coordinate geometry to twelve equivalent Rh atoms. All La–Rh bond lengths are 3.20 Å. Rh is bonded to six equivalent La and six equivalent Rh atoms to form a mixture of edge, face, and corner-sharing RhLa6Rh6 cuboctahedra. All Rh–Rh bond lengths are 2.73 Å.
36 MATERIALS SCIENCE↗
Materials Data on La2Rh7 by Materials Project
La2Rh7 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent La sites. In the first La site, La is bonded in a 12-coordinate geometry to twelve Rh atoms. There are a spread of La–Rh bond distances ranging from 3.05–3.44 Å. In the second La site, La is bonded in a 6-coordinate geometry to eighteen Rh atoms. There are a spread of La–Rh bond distances ranging from 3.09–3.57 Å. There are five inequivalent Rh sites. In the first Rh site, Rh is bonded in a 3-coordinate geometry to three equivalent La and nine Rh atoms. There are a spread of Rh–Rh bond distances ranging from 2.67–3.08 Å. In the second Rh site, Rh is bonded to four equivalent La and eight Rh atoms to form a mixture of edge, face, and corner-sharing RhLa4Rh8 cuboctahedra. There are four shorter (2.67 Å) and two longer (2.70 Å) Rh–Rh bond lengths. In the third Rh site, Rh is bonded to five La and seven Rh atoms to form a mixture of distorted edge, face, and corner-sharing RhLa5Rh7 cuboctahedra. There are a spread of Rh–Rh bond distances ranging from 2.66–2.75 Å. In the fourth Rh site, Rh is bonded in a 3-coordinate geometry to three equivalent La and nine Rh atoms. In the fifth Rh site, Rh is bonded to six equivalent La and six equivalent Rh atoms to form RhLa6Rh6 cuboctahedra that share corners with twelve equivalent RhLa5Rh7 cuboctahedra, edges with six equivalent RhLa6Rh6 cuboctahedra, and faces with eighteen equivalent RhLa5Rh7 cuboctahedra.
36 MATERIALS SCIENCE↗
Materials Data on LaRh by Materials Project
LaRh crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. La is bonded in a 7-coordinate geometry to seven equivalent Rh atoms. There are a spread of La–Rh bond distances ranging from 2.97–3.25 Å. Rh is bonded in a 5-coordinate geometry to seven equivalent La and two equivalent Rh atoms. Both Rh–Rh bond lengths are 2.92 Å.
36 MATERIALS SCIENCE↗
Materials Data on LaRh3 by Materials Project
Rh3La crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent La sites. In the first La site, La is bonded in a 12-coordinate geometry to twelve Rh atoms. There are a spread of La–Rh bond distances ranging from 3.09–3.39 Å. In the second La site, La is bonded in a distorted hexagonal planar geometry to eighteen Rh atoms. There are six shorter (3.10 Å) and twelve longer (3.47 Å) La–Rh bond lengths. There are four inequivalent Rh sites. In the first Rh site, Rh is bonded to five La and seven Rh atoms to form a mixture of distorted corner, edge, and face-sharing RhLa5Rh7 cuboctahedra. There are a spread of Rh–Rh bond distances ranging from 2.68–2.75 Å. In the second Rh site, Rh is bonded in a 12-coordinate geometry to three equivalent La and six equivalent Rh atoms. In the third Rh site, Rh is bonded in a 12-coordinate geometry to three equivalent La and six equivalent Rh atoms. In the fourth Rh site, Rh is bonded to six equivalent La and six equivalent Rh atoms to form RhLa6Rh6 cuboctahedra that share corners with twelve equivalent RhLa5Rh7 cuboctahedra, edges with six equivalent RhLa6Rh6 cuboctahedra, and faces with eighteen equivalent RhLa5Rh7 cuboctahedra.
36 MATERIALS SCIENCE↗