Materials Data on Tm4MgGe4 by Materials Project
MgTm4Ge4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Mg is bonded to five Ge atoms to form distorted corner-sharing MgGe5 square pyramids. There are a spread of Mg–Ge bond distances ranging from 2.73–3.10 Å. There are two inequivalent Tm sites. In the first Tm site, Tm is bonded in a 7-coordinate geometry to seven Ge atoms. There are a spread of Tm–Ge bond distances ranging from 2.94–3.25 Å. In the second Tm site, Tm is bonded in a 6-coordinate geometry to six Ge atoms. There are a spread of Tm–Ge bond distances ranging from 2.81–3.02 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to two equivalent Mg, six Tm, 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 one Mg, seven Tm, and one Ge atom. The Ge–Ge bond length is 2.74 Å. In the third Ge site, Ge is bonded in a 8-coordinate geometry to one Mg, six Tm, and one Ge atom.