Materials Data on GeBr2 by Materials Project
GeBr2 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two GeBr2 ribbons oriented in the (1, 0, 0) direction and one GeBr2 sheet oriented in the (0, 0, 1) direction. In each GeBr2 ribbon, Ge2+ is bonded in a rectangular see-saw-like geometry to four Br1- atoms. There are a spread of Ge–Br bond distances ranging from 2.51–3.10 Å. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Ge2+ atoms. In the second Br1- site, Br1- is bonded in an L-shaped geometry to two equivalent Ge2+ atoms. In the GeBr2 sheet, Ge2+ is bonded in a 4-coordinate geometry to four Br1- atoms. There are a spread of Ge–Br bond distances ranging from 2.54–2.96 Å. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Ge2+ atoms. In the second Br1- site, Br1- is bonded in a distorted water-like geometry to two equivalent Ge2+ atoms.