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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on La(CoGe)2 by Materials Project

LaCo2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. La is bonded in a 8-coordinate geometry to eight equivalent Co and eight equivalent Ge atoms. All La–Co bond lengths are 3.28 Å. All La–Ge bond lengths are 3.23 Å. Co is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Ge atoms. All Co–Ge bond lengths are 2.36 Å. Ge is bonded in a 9-coordinate geometry to four equivalent La, four equivalent Co, and one Ge atom. The Ge–Ge bond length is 2.80 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LaCoGe3 by Materials Project

LaCoGe3 crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. La is bonded in a 12-coordinate geometry to five equivalent Co and twelve Ge atoms. There are one shorter (3.33 Å) and four longer (3.49 Å) La–Co bond lengths. There are a spread of La–Ge bond distances ranging from 3.16–3.36 Å. Co is bonded in a 5-coordinate geometry to five equivalent La and five Ge atoms. There are one shorter (2.31 Å) and four longer (2.37 Å) Co–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 2-coordinate geometry to four equivalent La, two equivalent Co, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.78 Å. In the second Ge site, Ge is bonded in a 1-coordinate geometry to four equivalent La, one Co, and four equivalent Ge atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LaCoGe by Materials Project

LaCoGe is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. La is bonded in a 9-coordinate geometry to four equivalent Co and five equivalent Ge atoms. All La–Co bond lengths are 3.03 Å. There are four shorter (3.11 Å) and one longer (3.62 Å) La–Ge bond lengths. Co is bonded in a 8-coordinate geometry to four equivalent La and four equivalent Ge atoms. All Co–Ge bond lengths are 2.44 Å. Ge is bonded in a 9-coordinate geometry to five equivalent La and four equivalent Co atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La5CoGe3 by Materials Project

La5CoGe3 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. there are two inequivalent La sites. In the first La site, La is bonded in a 5-coordinate geometry to two equivalent Co and three equivalent Ge atoms. Both La–Co bond lengths are 2.80 Å. There are one shorter (3.19 Å) and two longer (3.22 Å) La–Ge bond lengths. In the second La site, La is bonded in a 6-coordinate geometry to six equivalent Ge atoms. All La–Ge bond lengths are 3.27 Å. Co is bonded to six equivalent La atoms to form face-sharing CoLa6 octahedra. Ge is bonded in a 7-coordinate geometry to seven La atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LaCoGe2 by Materials Project

LaCoGe2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. La is bonded in a 10-coordinate geometry to five equivalent Co and ten Ge atoms. There are four shorter (3.32 Å) and one longer (3.42 Å) La–Co bond lengths. There are a spread of La–Ge bond distances ranging from 3.19–3.35 Å. Co is bonded in a 5-coordinate geometry to five equivalent La and five Ge atoms. There are a spread of Co–Ge bond distances ranging from 2.31–2.43 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to six equivalent La, one Co, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.64 Å. In the second Ge site, Ge is bonded in a 8-coordinate geometry to four equivalent La and four equivalent Co atoms.

36 MATERIALS SCIENCE↗