Fig. 1: Crystal-structural features of Hg18Ga8Se8Cl32.
From: [Hg3Se2]2- cluster drives giant optical anisotropy and broad infrared transparency
a Coordination environment of Hg atoms in HGSC. b A one-dimensional helical channel along the b-axis. c A chair-like conformation of Hg8Se6 along the b-axis. d Alternating antiparallel stacking of helical channels and chair-like conformations along the c-axis. e Crystal structure of HGSC viewed along the b-axis.
