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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on La(GePt)2 by Materials Project

LaPt2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. La is bonded in a 8-coordinate geometry to eight equivalent Pt and eight equivalent Ge atoms. All La–Pt bond lengths are 3.37 Å. All La–Ge bond lengths are 3.41 Å. Pt is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Ge atoms. All Pt–Ge bond lengths are 2.55 Å. Ge is bonded in a 9-coordinate geometry to four equivalent La, four equivalent Pt, and one Ge atom. The Ge–Ge bond length is 2.58 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La(GePt)2 by Materials Project

LaPt2Ge2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. La is bonded in a 1-coordinate geometry to eight Pt and eight Ge atoms. There are a spread of La–Pt bond distances ranging from 3.34–3.42 Å. There are a spread of La–Ge bond distances ranging from 3.32–3.43 Å. There are two inequivalent Pt sites. In the first Pt site, Pt is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Ge atoms. There are a spread of Pt–Ge bond distances ranging from 2.56–2.58 Å. In the second Pt site, Pt is bonded in a 5-coordinate geometry to four equivalent La and five Ge atoms. There are one shorter (2.50 Å) and four longer (2.55 Å) Pt–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Pt atoms. In the second Ge site, Ge is bonded in a 5-coordinate geometry to four equivalent La and five Pt atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La(GePt)2 by Materials Project

LaPt2Ge2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. La is bonded in a 12-coordinate geometry to eight Pt and eight Ge atoms. There are a spread of La–Pt bond distances ranging from 3.24–3.55 Å. There are a spread of La–Ge bond distances ranging from 3.24–3.60 Å. There are two inequivalent Pt sites. In the first Pt site, Pt is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Ge atoms. There are a spread of Pt–Ge bond distances ranging from 2.52–2.61 Å. In the second Pt site, Pt is bonded in a 5-coordinate geometry to four equivalent La and five Ge atoms. There are a spread of Pt–Ge bond distances ranging from 2.52–2.56 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Pt atoms. In the second Ge site, Ge is bonded in a 5-coordinate geometry to four equivalent La and five Pt atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La(Ge3Pt)4 by Materials Project

LaPt4Ge12 crystallizes in the cubic Im-3 space group. The structure is three-dimensional. La is bonded to twelve equivalent Ge atoms to form LaGe12 cuboctahedra that share faces with eight equivalent PtGe6 octahedra. All La–Ge bond lengths are 3.38 Å. Pt is bonded to six equivalent Ge atoms to form PtGe6 octahedra that share corners with six equivalent PtGe6 octahedra and faces with two equivalent LaGe12 cuboctahedra. The corner-sharing octahedral tilt angles are 60°. All Pt–Ge bond lengths are 2.53 Å. Ge is bonded in a 2-coordinate geometry to one La, two equivalent Pt, and two equivalent Ge atoms. There are one shorter (2.54 Å) and one longer (2.66 Å) Ge–Ge bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LaGePt by Materials Project

LaPtGe is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. The structure is three-dimensional. La is bonded to six Pt and six equivalent Ge atoms to form a mixture of edge and face-sharing LaGe6Pt6 cuboctahedra. All La–Pt bond lengths are 3.30 Å. There are four shorter (3.28 Å) and two longer (3.35 Å) La–Ge bond lengths. There are two inequivalent Pt sites. In the first Pt site, Pt is bonded in a 3-coordinate geometry to six equivalent La and three equivalent Ge atoms. There are two shorter (2.50 Å) and one longer (2.52 Å) Pt–Ge bond lengths. In the second Pt site, Pt is bonded in a 3-coordinate geometry to six equivalent La and three equivalent Ge atoms. There are two shorter (2.50 Å) and one longer (2.52 Å) Pt–Ge bond lengths. Ge is bonded in a 3-coordinate geometry to six equivalent La and three Pt atoms.

36 MATERIALS SCIENCE↗