Answers are grounded in this paper and cite their sources.
Measurements of the hardness of a new high-pressure boron phase, orthorhombic γ-B 28 , are reported. According to the data obtained, γ-B 28 has the highest hardness (∼ 50 GPa) of all known crystal-line modifications of boron.
No takes yet. Share an insight, caveat, or question.
Solozhenko et al. (2008) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: