A little bit of lithium does a lot for hydrogen.

@article{Zurek2009ALB,
  title={A little bit of lithium does a lot for hydrogen.},
  author={Eva Zurek and Roald Hoffmann and Neil W. Ashcroft and Artem R. Oganov and Andriy O. Lyakhov},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2009},
  volume={106 42},
  pages={17640-3}
}
From detailed assessments of electronic structure, we find that a combination of significantly quantal elements, six of seven atoms being hydrogen, becomes a stable metal at a pressure approximately 1/4 of that required to metalize pure hydrogen itself. The system, LiH(6) (and other LiH(n)), may well have extensions beyond the constituent lithium. These hypothetical materials demonstrate that nontraditional stoichiometries can considerably expand the view of chemical combination under moderate… CONTINUE READING

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