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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ho2MgGe2 by Materials Project

MgHo2Ge2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. Mg is bonded in a square co-planar geometry to four equivalent Ge atoms. All Mg–Ge bond lengths are 2.87 Å. Ho is bonded in a 6-coordinate geometry to six equivalent Ge atoms. There are two shorter (2.95 Å) and four longer (3.08 Å) Ho–Ge bond lengths. Ge is bonded in a 9-coordinate geometry to two equivalent Mg, six equivalent Ho, and one Ge atom. The Ge–Ge bond length is 2.55 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho4MgGe4 by Materials Project

MgHo4Ge4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Mg is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Mg–Ge bond distances ranging from 2.75–3.14 Å. There are two inequivalent Ho sites. In the first Ho site, Ho is bonded in a 7-coordinate geometry to seven Ge atoms. There are a spread of Ho–Ge bond distances ranging from 2.97–3.30 Å. In the second Ho site, Ho is bonded in a 6-coordinate geometry to six Ge atoms. There are a spread of Ho–Ge bond distances ranging from 2.84–3.05 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to one Mg, six Ho, and one Ge atom. The Ge–Ge bond length is 2.60 Å. In the second Ge site, Ge is bonded in a 9-coordinate geometry to two equivalent Mg, six Ho, and one Ge atom. In the third Ge site, Ge is bonded in a 9-coordinate geometry to one Mg, seven Ho, and one Ge atom. The Ge–Ge bond length is 2.73 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho2Mg3Ge4 by Materials Project

Mg3Ho2Ge4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded in a 6-coordinate geometry to six Ge atoms. There are a spread of Mg–Ge bond distances ranging from 2.74–3.18 Å. In the second Mg site, Mg is bonded in a 6-coordinate geometry to six Ge atoms. There are a spread of Mg–Ge bond distances ranging from 2.76–3.01 Å. Ho is bonded in a 7-coordinate geometry to seven Ge atoms. There are a spread of Ho–Ge bond distances ranging from 2.95–3.21 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to four Mg, four equivalent Ho, and one Ge atom. The Ge–Ge bond length is 2.59 Å. In the second Ge site, Ge is bonded in a 9-coordinate geometry to six Mg, two equivalent Ho, and one Ge atom. In the third Ge site, Ge is bonded in a 9-coordinate geometry to four Mg, four equivalent Ho, and one Ge atom. The Ge–Ge bond length is 2.66 Å.

36 MATERIALS SCIENCE↗