Materials Data on Ag2GePbS4 by Materials Project
Ag2PbGeS4 crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. Ag1+ is bonded in a 4-coordinate geometry to four S2- atoms. There are a spread of Ag–S bond distances ranging from 2.51–3.07 Å. Pb2+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Pb–S bond distances ranging from 2.92–3.60 Å. Ge4+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of Ge–S bond distances ranging from 2.24–2.26 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to two equivalent Ag1+, two equivalent Pb2+, and one Ge4+ atom. In the second S2- site, S2- is bonded in a distorted single-bond geometry to two equivalent Ag1+, two equivalent Pb2+, and one Ge4+ atom. In the third S2- site, S2- is bonded in a 3-coordinate geometry to two equivalent Ag1+, two equivalent Pb2+, and one Ge4+ atom.