hide
Free keywords:
-
Abstract:
We have performed angle-dispersive X-ray powder diffraction experiments
on LiGa, LiIn, LiZn, and LiCd at pressures up to 21 GPa using diamond
anvil cell techniques. Upon thermal annealing, LiIn and LiCd are both
found to undergo phase transformations at a pressure of 11(1) GPa into
high-pressure phases with a beta-brass (CsCl) structure. Optical
reflectivity measurements indicate metallic behavior of the
ambient-pressure phases. Band structure calculations for LiIn confirm
the covalent character of the bonding within the diamond-type indium
partial structure. The transformation into the CsCl-type phase is
associated with a loss of directional In-In bonds. (C) 1998 Academic
Press.
