In general, the proposed diagram accurately describes the observed growth of melting temperature of orthorhombic phosphorus up to 1.6 GPa and its decrease at higher pressures up to the orthorhombic-rhombohedral-liquid 2 triple point (2.65 GPa, 1153 K), as well as the stability of two liquid phosphorus phases and existence of the first-order phase transition between them in full accordance with previous publications . Also noteworthy is the fact that calculated melting line of simple cubic phosphorus with positive slope of 316 K/GPa is in good agreement with our experimental data at temperatures above the rhombohedral-liquid 2-simple cubic triple point (8.26 GPa, 1491 K).