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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Tm8Ga3Co by Materials Project

Tm8CoGa3 crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are four inequivalent Tm sites. In the first Tm site, Tm is bonded to one Co and four equivalent Ga atoms to form distorted TmGa4Co trigonal pyramids that share corners with two equivalent TmGa6 octahedra, corners with three equivalent TmGa3Co tetrahedra, corners with six equivalent TmGa4Co trigonal pyramids, an edgeedge with one TmGa3Co tetrahedra, edges with four equivalent TmGa4Co trigonal pyramids, and faces with two equivalent TmGa6 octahedra. The corner-sharing octahedra tilt angles range from 53–58°. The Tm–Co bond length is 2.78 Å. There are a spread of Tm–Ga bond distances ranging from 2.90–3.76 Å. In the second Tm site, Tm is bonded to one Co and three equivalent Ga atoms to form distorted TmGa3Co tetrahedra that share corners with six equivalent TmGa6 octahedra, corners with nine equivalent TmGa4Co trigonal pyramids, and edges with three equivalent TmGa4Co trigonal pyramids. The corner-sharing octahedra tilt angles range from 16–47°. The Tm–Co bond length is 2.64 Å. All Tm–Ga bond lengths are 3.04 Å. In the third Tm site, Tm is bonded in a 3-coordinate geometry to one Co and four equivalent Ga atoms. The Tm–Co bond length is 2.75 Å. There are two shorter (3.13 Å) and two longer (3.65 Å) Tm–Ga bond lengths. In the fourth Tm site, Tm is bonded to six equivalent Ga atoms to form distorted TmGa6 octahedra that share corners with six equivalent TmGa3Co tetrahedra, corners with six equivalent TmGa4Co trigonal pyramids, faces with two equivalent TmGa6 octahedra, and faces with six equivalent TmGa4Co trigonal pyramids. There are three shorter (3.20 Å) and three longer (3.35 Å) Tm–Ga bond lengths. Co is bonded in a 7-coordinate geometry to seven Tm atoms. Ga is bonded in a 11-coordinate geometry to eleven Tm atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tm6GaCo2 by Materials Project

Tm6Co2Ga crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are three inequivalent Tm sites. In the first Tm site, Tm is bonded in a 4-coordinate geometry to two Co and two Ga atoms. There are one shorter (2.76 Å) and one longer (3.16 Å) Tm–Co bond lengths. There are one shorter (2.97 Å) and one longer (3.20 Å) Tm–Ga bond lengths. In the second Tm site, Tm is bonded in a 5-coordinate geometry to three Co and two Ga atoms. There are two shorter (2.87 Å) and one longer (3.10 Å) Tm–Co bond lengths. There are one shorter (3.11 Å) and one longer (3.57 Å) Tm–Ga bond lengths. In the third Tm site, Tm is bonded in a 4-coordinate geometry to three Co and one Ga atom. There are one shorter (2.69 Å) and two longer (2.81 Å) Tm–Co bond lengths. The Tm–Ga bond length is 3.31 Å. There are two inequivalent Co sites. In the first Co site, Co is bonded in a 9-coordinate geometry to eight Tm and one Co atom. The Co–Co bond length is 2.23 Å. In the second Co site, Co is bonded in a 9-coordinate geometry to eight Tm and one Co atom. The Co–Co bond length is 2.54 Å. There are two inequivalent Ga sites. In the first Ga site, Ga is bonded in a body-centered cubic geometry to eight Tm atoms. In the second Ga site, Ga is bonded in a cuboctahedral geometry to twelve Tm atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TmGa5Co by Materials Project

TmCoGa5 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Tm is bonded to twelve Ga atoms to form TmGa12 cuboctahedra that share corners with four equivalent TmGa12 cuboctahedra, faces with four equivalent TmGa12 cuboctahedra, and faces with four equivalent GaTm4Ga8 cuboctahedra. There are eight shorter (2.97 Å) and four longer (2.98 Å) Tm–Ga bond lengths. Co is bonded in a body-centered cubic geometry to eight Ga atoms. All Co–Ga bond lengths are 2.47 Å. There are three inequivalent Ga sites. In the first Ga site, Ga is bonded in a 4-coordinate geometry to two equivalent Tm, two equivalent Co, and seven Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.59–2.98 Å. In the second Ga site, Ga is bonded in a 4-coordinate geometry to two equivalent Tm, two equivalent Co, and seven Ga atoms. Both Ga–Ga bond lengths are 2.97 Å. In the third Ga site, Ga is bonded to four equivalent Tm and eight Ga atoms to form distorted GaTm4Ga8 cuboctahedra that share corners with four equivalent GaTm4Ga8 cuboctahedra, faces with four equivalent TmGa12 cuboctahedra, and faces with four equivalent GaTm4Ga8 cuboctahedra.

36 MATERIALS SCIENCE↗