Unexpected Stable Stoichiometries of Sodium Chlorides

@article{Zhang2013UnexpectedSS,
  title={Unexpected Stable Stoichiometries of Sodium Chlorides},
  author={Weiwei Zhang and Artem R. Oganov and Alexander F. Goncharov and Qiang Zhu and Salah Eddine Boulfelfel and Andriy O. Lyakhov and Elissaios Stavrou and Maddury Somayazulu and Vitali B. Prakapenka and Zuzana Kon{\^o}pkov{\'a}},
  journal={Science},
  year={2013},
  volume={342},
  pages={1502 - 1505}
}
Salt to Squeeze Simple table salt, NaCl, is the only known stable phase of Na and Cl at ambient conditions. Previous attempts to understand its structure and chemical properties under pressure and at high temperatures revealed phase and bonding transitions, while keeping the balance of one Na to one Cl. Using crystal structure prediction algorithms, Zhang et al. (p. 1502; see the Perspective by Ibáñez Insa) show that other compounds—including Na3Cl, Na2Cl, Na3Cl2, NaCl3, and NaCl7 are as stable… 
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