On the hardness of a new boron phase, orthorhombic γ-B28

@article{Solozhenko2008OnTH,
  title={On the hardness of a new boron phase, orthorhombic $\gamma$-B28},
  author={V. Solozhenko and O. O. Kurakevych and A. Oganov},
  journal={Journal of Superhard Materials},
  year={2008},
  volume={30},
  pages={428-429}
}
Measurements of the hardness of a new high-pressure boron phase, orthorhombic γ-B28, are reported. According to the data obtained, γ-B28 has the highest hardness (∼ 50 GPa) of all known crystal-line modifications of boron. 

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