Abstract
High-Pressure Physics Metal polyhydrides can be used at lower pressures to make material that might have atomic hydrogen bonding. Pepin et al. manage to synthesize an incredibly hydrogen-rich FeH5 compound at 130 GPa pressure. The material consists of slabs of four thin planes of atomic hydrogen intercalated with layers of quasicubic FeH3 units. These metal polyhydrides were stable at far more accessible pressures than pure hydrogen. This achievement provides an opportunity to investigate special electrical properties expected from atomic hydrogen bonding, such as superconductivity. Science , this issue p. [382][1] [1]: /lookup/doi/10.1126/science.aan0961
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