The constructed p-T phase diagram of phosphorus is shown in Fig. . It should be noted that calculated melting curve of orthorhombic phase with appearance of low-pressure liquid phosphorus (liquid 1) and position of the liquid 1-orthorhombic-liquid 2 triple point (1.61 GPa, 1435 K) differ from the previously reported experimental data . At the same time, calculated melting temperature at ambient pressure corresponds to the generally accepted value for phosphorus , and the calculated melting curve of orthorhombic phase with appearance of high-pressure liquid phosphorus (liquid 2) perfectly agrees with the results of our in-situ experiments in the 2.0-2.6 GPa range.