Fig. 2
From: Pressure-driven collapse of the relativistic electronic ground state in a honeycomb iridate
a High pressure X-ray powder diffraction measurements reveal a series of pressure-induced structural distortions in α-Li2IrO3. b At ambient pressure, α-Li2IrO3 displays an almost ideal undistorted Ir honeycomb lattice. c As the pressure increases, the honeycomb lattice distorts, forming four shorter bonds and 2 longer bonds on each Ir hexagon. d Above 3 GPa, the honeycomb lattice buckles and begins to dimerize, with each hexagon developing 2 short bonds, 2 medium bonds, and 2 long bonds
