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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Rb3Yb by Materials Project

Rb3Yb is beta-derived structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Rb is bonded to eight equivalent Rb and four equivalent Yb atoms to form distorted RbRb8Yb4 cuboctahedra that share corners with four equivalent YbRb12 cuboctahedra, corners with fourteen equivalent RbRb8Yb4 cuboctahedra, edges with six equivalent YbRb12 cuboctahedra, edges with twelve equivalent RbRb8Yb4 cuboctahedra, faces with four equivalent YbRb12 cuboctahedra, and faces with sixteen equivalent RbRb8Yb4 cuboctahedra. There are a spread of Rb–Rb bond distances ranging from 4.64–4.88 Å. There are two shorter (4.71 Å) and two longer (4.76 Å) Rb–Yb bond lengths. Yb is bonded to twelve equivalent Rb atoms to form YbRb12 cuboctahedra that share corners with six equivalent YbRb12 cuboctahedra, corners with twelve equivalent RbRb8Yb4 cuboctahedra, edges with eighteen equivalent RbRb8Yb4 cuboctahedra, faces with eight equivalent YbRb12 cuboctahedra, and faces with twelve equivalent RbRb8Yb4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbYb3 by Materials Project

RbYb3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Rb is bonded in a body-centered cubic geometry to fourteen Yb atoms. There are eight shorter (4.03 Å) and six longer (4.65 Å) Rb–Yb bond lengths. There are two inequivalent Yb sites. In the first Yb site, Yb is bonded in a body-centered cubic geometry to four equivalent Rb and four equivalent Yb atoms. All Yb–Yb bond lengths are 4.03 Å. In the second Yb site, Yb is bonded in a 8-coordinate geometry to six equivalent Rb and eight equivalent Yb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbYb3 by Materials Project

RbYb3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Rb is bonded to twelve Yb atoms to form RbYb12 cuboctahedra that share corners with four equivalent RbYb12 cuboctahedra, corners with eight equivalent YbRb4Yb8 cuboctahedra, edges with eight equivalent RbYb12 cuboctahedra, edges with sixteen equivalent YbRb4Yb8 cuboctahedra, faces with four equivalent RbYb12 cuboctahedra, and faces with fourteen YbRb4Yb8 cuboctahedra. All Rb–Yb bond lengths are 4.12 Å. There are two inequivalent Yb sites. In the first Yb site, Yb is bonded to four equivalent Rb and eight Yb atoms to form YbRb4Yb8 cuboctahedra that share corners with twelve equivalent YbRb4Yb8 cuboctahedra, edges with eight equivalent RbYb12 cuboctahedra, edges with sixteen YbRb4Yb8 cuboctahedra, faces with four equivalent RbYb12 cuboctahedra, and faces with fourteen YbRb4Yb8 cuboctahedra. All Yb–Yb bond lengths are 4.12 Å. In the second Yb site, Yb is bonded to four equivalent Rb and eight equivalent Yb atoms to form YbRb4Yb8 cuboctahedra that share corners with four equivalent YbRb4Yb8 cuboctahedra, corners with eight equivalent RbYb12 cuboctahedra, edges with twenty-four YbRb4Yb8 cuboctahedra, faces with six equivalent RbYb12 cuboctahedra, and faces with twelve YbRb4Yb8 cuboctahedra.

36 MATERIALS SCIENCE↗