Synthesis of Na₃WH₉ and Na₃ReH₈ Ternary Hydrides at High Pressures.

ABSTRACT: The Na-W-H and Na-Re-H ternary systems were studied in a diamond anvil cell through X-ray diffraction and Raman spectroscopy, supported by density functional theory and molecular dynamics calculations. Na₃WH₉ can be synthesized above 7.8 GPa and 1400 K, remaining stable between at least 0.1 and 42.1 GPa. The rhenium analogue Na₃ReH₈ can form at 10.1 GPa upon laser heating, being stable between at least 0.3 and 32.5 GPa. Na₃WH₉ and Na₃ReH₈ host [WH₉]^3- and [ReH₈]^3- anions, respectively, forming homoleptic 18-electron complexes in both cases. Both ternary hydrides show similar structural types and pressure dependent phase transitions. At the highest pressures th

SUBMITTER: Marqueno T 

PROVIDER: S-EPMC11558676 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature