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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Li(Fe3Ge2)2 by Materials Project

LiFe6Ge4 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Li is bonded to twelve Fe and eight Ge atoms to form distorted face-sharing LiFe12Ge8 hexagonal bipyramids. All Li–Fe bond lengths are 3.25 Å. There are two shorter (2.48 Å) and six longer (2.91 Å) Li–Ge bond lengths. There are three inequivalent Fe sites. In the first Fe site, Fe is bonded in a 5-coordinate geometry to two equivalent Li, six Fe, and five Ge atoms. There are a spread of Fe–Fe bond distances ranging from 2.46–2.80 Å. There are a spread of Fe–Ge bond distances ranging from 2.48–2.56 Å. In the second Fe site, Fe is bonded in a 5-coordinate geometry to two equivalent Li, six equivalent Fe, and five Ge atoms. There are a spread of Fe–Ge bond distances ranging from 2.48–2.56 Å. In the third Fe site, Fe is bonded in a 5-coordinate geometry to two equivalent Li, six equivalent Fe, and five Ge atoms. Both Fe–Li bond lengths are 3.25 Å. There are a spread of Fe–Fe bond distances ranging from 2.46–2.80 Å. There are a spread of Fe–Ge bond distances ranging from 2.48–2.56 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to one Li and nine Fe atoms. In the second Ge site, Ge is bonded in a 12-coordinate geometry to three equivalent Li and six Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li(FeGe)6 by Materials Project

Li(FeGe)6 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded to twelve equivalent Fe and eight Ge atoms to form distorted corner-sharing LiFe12Ge8 hexagonal bipyramids. All Li–Fe bond lengths are 3.22 Å. There are two shorter (2.70 Å) and six longer (2.86 Å) Li–Ge bond lengths. In the second Li site, Li is bonded to twelve Fe and eight Ge atoms to form a mixture of distorted corner and face-sharing LiFe12Ge8 hexagonal bipyramids. There are six shorter (3.20 Å) and six longer (3.22 Å) Li–Fe bond lengths. There are two shorter (2.69 Å) and six longer (2.88 Å) Li–Ge bond lengths. There are two inequivalent Fe sites. In the first Fe site, Fe is bonded in a 12-coordinate geometry to two Li, four Fe, and six Ge atoms. All Fe–Fe bond lengths are 2.51 Å. There are four shorter (2.47 Å) and two longer (2.61 Å) Fe–Ge bond lengths. In the second Fe site, Fe is bonded in a 12-coordinate geometry to two equivalent Li, four equivalent Fe, and six Ge atoms. There are a spread of Fe–Ge bond distances ranging from 2.46–2.60 Å. There are four inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to one Li, six Fe, and one Ge atom. The Ge–Ge bond length is 2.61 Å. In the second Ge site, Ge is bonded in a 7-coordinate geometry to one Li and six Fe atoms. In the third Ge site, Ge is bonded in a 8-coordinate geometry to two equivalent Li and six Fe atoms. In the fourth Ge site, Ge is bonded in a 8-coordinate geometry to one Li, six equivalent Fe, and one Ge atom. The Ge–Ge bond length is 2.59 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiFe6Ge5 by Materials Project

LiFe6Ge5 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Li is bonded in a 8-coordinate geometry to six equivalent Fe and eight Ge atoms. All Li–Fe bond lengths are 3.09 Å. There are a spread of Li–Ge bond distances ranging from 2.53–2.91 Å. There are two inequivalent Fe sites. In the first Fe site, Fe is bonded to two equivalent Li, four equivalent Fe, and six Ge atoms to form a mixture of distorted corner, edge, and face-sharing FeLi2Fe4Ge6 cuboctahedra. There are two shorter (2.51 Å) and two longer (2.52 Å) Fe–Fe bond lengths. There are a spread of Fe–Ge bond distances ranging from 2.46–2.62 Å. In the second Fe site, Fe is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Fe–Ge bond distances ranging from 2.49–2.54 Å. There are five inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to three equivalent Li and six Fe atoms. In the second Ge site, Ge is bonded in a 6-coordinate geometry to six equivalent Fe atoms. In the third Ge site, Ge is bonded in a 1-coordinate geometry to one Li, six equivalent Fe, and one Ge atom. The Ge–Ge bond length is 2.56 Å. In the fourth Ge site, Ge is bonded in a 1-coordinate geometry to one Li and nine equivalent Fe atoms. In the fifth Ge site, Ge is bonded in a 9-coordinate geometry to three equivalent Li and six Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiFe6Ge5 by Materials Project

LiFe6Ge5 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Li is bonded in a 8-coordinate geometry to six Fe and eight Ge atoms. There are a spread of Li–Fe bond distances ranging from 3.06–3.10 Å. There are a spread of Li–Ge bond distances ranging from 2.53–2.92 Å. There are four inequivalent Fe sites. In the first Fe site, Fe is bonded to two equivalent Li, four Fe, and six Ge atoms to form a mixture of distorted edge, face, and corner-sharing FeLi2Fe4Ge6 cuboctahedra. All Fe–Fe bond lengths are 2.50 Å. There are a spread of Fe–Ge bond distances ranging from 2.46–2.61 Å. In the second Fe site, Fe is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Fe–Ge bond distances ranging from 2.49–2.53 Å. In the third Fe site, Fe is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Fe–Ge bond distances ranging from 2.48–2.53 Å. In the fourth Fe site, Fe is bonded to two equivalent Li, four equivalent Fe, and six Ge atoms to form a mixture of distorted edge, face, and corner-sharing FeLi2Fe4Ge6 cuboctahedra. There are a spread of Fe–Ge bond distances ranging from 2.46–2.61 Å. There are five inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to three equivalent Li and six Fe atoms. In the second Ge site, Ge is bonded in a 1-coordinate geometry to one Li and nine Fe atoms. In the third Ge site, Ge is bonded in a 9-coordinate geometry to three equivalent Li and six Fe atoms. In the fourth Ge site, Ge is bonded in a 6-coordinate geometry to six Fe atoms. In the fifth Ge site, Ge is bonded in a 1-coordinate geometry to one Li, six Fe, and one Ge atom. The Ge–Ge bond length is 2.54 Å.

36 MATERIALS SCIENCE↗