Citation: Luo, H.; Greene, R. G.; Ruoff, A. L. (1993). Beta-Po phase of sulfur at 162 GPa: X-ray diffraction study to 212 GPa Sample: at P = 206.5 GPa Note: this is known as the Beta-Po phase of sulfur, stable above 162 GPa. Physical Review Letters, 71, pp. 2943-2946.