The effect of pressure on the crystal structure of white phosphorus has been studied up to 22.4 GPa. The α phase was found to transform into the α′ phase at 0.87±0.04 GPa with a volume change in 0.1±0.3 cc/mol. A fit of a second-order Birch-Murnaghan equation to the data gave Vo =16.94±0.08 cc/mol and Ko =6.7±0.5 GPa for the α phase and Vo =16.4±0.1 cc/mol and Ko =9.1±0.3 GPa for the α′ phase. The α′ phase was found to transform to the A17 phase of black phosphorus at 2.68±0.34 GPa and then with increasing pressure to the A7 and then simple cubic phase of black phosphorus. A fit of a second-order Birch-Murnaghan equation to our data combined with previous measurements gave Vo =11.43±0.05 cc/mol and Ko =34.7±0.5 GPa for the A17 phase, Vo =9.62±0.01 cc/mol and Ko =65.0±0.6 GPa for the A7 phase and, Vo =9.23±0.01 cc/mol and Ko =72.5±0.3 GPa for the simple cubic phase.
|Number of pages||6|
|Journal||Physical Review B: Condensed Matter and Materials Physics|
|Publication status||Published - 14 Oct 2010|