Abstract: | A direct transformation of the g‐BC3 phase to a new diamond‐like d‐BC3 phase was observed in a diamond‐anvil cell (DAC) at high temperature, 2033 ± 241 K, and high pressure, 50 GPa. Analysis of the peak positions of the d‐BC3, B4C, α‐boron, and the boron‐doped diamond leads to the conclusion that the positions of the peaks of the d‐BC3 are more similar to the peak pattern of the boron‐doped diamond rather than that of boron carbide, α‐boron. Copyright © 2007 John Wiley & Sons, Ltd. |