Materials Data on GeAs3 by Materials Project

Abstract

GeAs(As)2 crystallizes in the trigonal R3m space group. The structure is two-dimensional and consists of three As sheets oriented in the (0, 0, 1) direction and three GeAs sheets oriented in the (0, 0, 1) direction. In each As sheet, there are two inequivalent As+1.33- sites. In the first As+1.33- site, As+1.33- is bonded in a distorted T-shaped geometry to three equivalent As+1.33- atoms. All As–As bond lengths are 2.56 Å. In the second As+1.33- site, As+1.33- is bonded in a 3-coordinate geometry to three equivalent As+1.33- atoms. In each GeAs sheet, Ge4+ is bonded in a 3-coordinate geometry to three equivalent As+1.33- atoms. All Ge–As bond lengths are 2.48 Å. As+1.33- is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ge4+ atoms.