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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Yb2Ge2Ir by Materials Project

Yb2IrGe2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Yb sites. In the first Yb site, Yb is bonded in a 6-coordinate geometry to two equivalent Ir and six Ge atoms. Both Yb–Ir bond lengths are 3.29 Å. There are a spread of Yb–Ge bond distances ranging from 2.95–3.29 Å. In the second Yb site, Yb is bonded in a 2-coordinate geometry to four equivalent Ir and seven Ge atoms. There are a spread of Yb–Ir bond distances ranging from 3.14–3.22 Å. There are a spread of Yb–Ge bond distances ranging from 2.99–3.47 Å. Ir is bonded in a 10-coordinate geometry to six Yb and four Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.48–2.59 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to seven Yb, one Ir, and one Ge atom. The Ge–Ge bond length is 2.61 Å. In the second Ge site, Ge is bonded in a 10-coordinate geometry to six Yb, three equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.83 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Yb4Ge6Ir7 by Materials Project

Yb4Ir7Ge6 crystallizes in the cubic Im-3m space group. The structure is three-dimensional. Yb is bonded to six equivalent Ir and six equivalent Ge atoms to form YbGe6Ir6 cuboctahedra that share corners with twelve equivalent YbGe6Ir6 cuboctahedra, faces with six equivalent YbGe6Ir6 cuboctahedra, and faces with two equivalent IrGe6 octahedra. All Yb–Ir bond lengths are 2.95 Å. All Yb–Ge bond lengths are 3.00 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 12-coordinate geometry to four equivalent Yb and four equivalent Ge atoms. All Ir–Ge bond lengths are 2.59 Å. In the second Ir site, Ir is bonded to six equivalent Ge atoms to form IrGe6 octahedra that share faces with eight equivalent YbGe6Ir6 cuboctahedra. All Ir–Ge bond lengths are 2.64 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Yb and five Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YbGeIr by Materials Project

YbIrGe crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Yb is bonded in a 9-coordinate geometry to four equivalent Ir and five equivalent Ge atoms. There are three shorter (3.02 Å) and one longer (3.07 Å) Yb–Ir bond lengths. There are a spread of Yb–Ge bond distances ranging from 3.00–3.09 Å. Ir is bonded in a 8-coordinate geometry to four equivalent Yb and four equivalent Ge atoms. There are one shorter (2.54 Å) and three longer (2.55 Å) Ir–Ge bond lengths. Ge is bonded in a 9-coordinate geometry to five equivalent Yb and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗