Materials Data on GeAs2 by Materials Project
GeAs2 crystallizes in the orthorhombic Pbam space group. The structure is two-dimensional and consists of two GeAs2 sheets oriented in the (0, 0, 1) direction. there are two inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four As2- atoms to form corner-sharing GeAs4 tetrahedra. There are a spread of Ge–As bond distances ranging from 2.47–2.49 Å. In the second Ge4+ site, Ge4+ is bonded to four As2- atoms to form corner-sharing GeAs4 tetrahedra. There are a spread of Ge–As bond distances ranging from 2.48–2.54 Å. There are four inequivalent As2- sites. In the first As2- site, As2- is bonded in a distorted T-shaped geometry to three Ge4+ atoms. In the second As2- site, As2- is bonded in a 1-coordinate geometry to one Ge4+ and two equivalent As2- atoms. Both As–As bond lengths are 2.53 Å. In the third As2- site, As2- is bonded in a distorted trigonal non-coplanar geometry to one Ge4+ and two equivalent As2- atoms. In the fourth As2- site, As2- is bonded in a distorted trigonal non-coplanar geometry to three Ge4+ atoms.