Materials Data on Ge19(PBr)4 by Materials Project
Ge19P4(Br)4 crystallizes in the cubic P-43n space group. The structure is three-dimensional and consists of eight hydrobromic acid molecules and one Ge19P4 framework. In the Ge19P4 framework, there are three inequivalent Ge sites. In the first Ge site, Ge is bonded to three Ge and one P atom to form GeGe3P tetrahedra that share corners with two equivalent PGe4 tetrahedra and corners with ten GeGe3P tetrahedra. There are a spread of Ge–Ge bond distances ranging from 2.46–2.51 Å. The Ge–P bond length is 2.42 Å. In the second Ge site, Ge is bonded to three equivalent Ge and one P atom to form GeGe3P tetrahedra that share corners with three equivalent PGe4 tetrahedra and corners with nine GeGe3P tetrahedra. The Ge–P bond length is 2.39 Å. In the third Ge site, Ge is bonded to four equivalent Ge atoms to form GeGe4 tetrahedra that share corners with four equivalent PGe4 tetrahedra and corners with eight GeGe3P tetrahedra. P is bonded to four Ge atoms to form PGe4 tetrahedra that share corners with twelve GeGe3P tetrahedra.