Results for “Er5Rh3” | Engineering Papers

DOE OSTI2020

Materials Data on Er5Rh3 by Materials Project

Er5Rh3 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 3-coordinate geometry to five equivalent Rh atoms. There are a spread of Er–Rh bond distances ranging from 2.86–3.37 Å. In the second Er site, Er is bonded in a 6-coordinate geometry to six equivalent Rh atoms. All Er–Rh bond lengths are 2.95 Å. Rh is bonded in a 9-coordinate geometry to nine Er atoms.

36 MATERIALS SCIENCE↗

NASA NTRS1984

Intermediate phases in some rare earth-ruthenium systems

The phase equilibria and crystal structures of intermediate phases were investigated in eight representative RE-Ru systems using powder X-ray diffraction and metallographic techniques. The Fe3C, Mn5C2 and Er5Ru3 structures occur in all but the Ce-Ru systems. Phases analogous to Er5Ru3 possess an unknown crystal structure similar to Er5Rh3(I). MgCu2 and MgZn2 type Laves phases are encountered in the light rare earth and heavy rare earth systems, respectively, and RERu2 phases, where RE = Nd and Sm, possess both the Laves phase structures. An intermediate phase, NdRu, with an unknown structure, occurs only in the Nd-Ru system. A bcc structure with 40 atoms per unit cell is encountered in the phases Er3Ru2 and Y3Ru2. The behavior of cerium in Ce-Ru alloys is unique in that four unidentified structures, not encountered in other RE-Ru systems, have been encountered. Also a phase designated as Ce3Ru is found with the Th7Fe3 type structure.

Sharifrazi, P.↗