Materials Data on Y2GeI2 by Materials Project
Y2GeI2 crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three Y2GeI2 sheets oriented in the (0, 0, 1) direction. Y is bonded to three equivalent Ge and three equivalent I atoms to form a mixture of corner and edge-sharing YGe3I3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Y–Ge bond lengths are 2.92 Å. All Y–I bond lengths are 3.18 Å. Ge is bonded to six equivalent Y atoms to form edge-sharing GeY6 octahedra. I is bonded in a distorted T-shaped geometry to three equivalent Y atoms.
36 MATERIALS SCIENCE↗