Synthesis of rare-earth metal compounds through enhanced reactivity of alkali halides at high pressures.

ABSTRACT: Chemical stability of the alkali halides NaCl and KCl has allowed for their use as inert media in high-pressure high-temperature experiments. Here we demonstrate the unexpected reactivity of the halides with metals (Y, Dy, and Re) and iron oxide (FeO) in a laser-heated diamond anvil cell, thus providing a synthetic route for halogen-containing binary and ternary compounds. So far unknown chlorides, Y₂Cl and DyCl, and chloride carbides, Y₂ClC and Dy₂ClC, were synthesized at ~40 GPa and 2000 K and their structures were solved and refined using in situ single-crystal synchrotron X-ray diffraction. Also, FeCl₂ with the HP-PdF₂-type structure, previously reported at 108 GPa, was synthesized at ~160 GPa and 2100 K. The results of our ab init

SUBMITTER: Yin Y 

PROVIDER: S-EPMC9814685 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature