Melting of phosphorus at pressures 4-6 GPa have been in-situ studied by energy-dispersive synchrotron X-ray diffraction using MAX80 multianvil system at F2.1 beamline, DORIS III (DESY). Standard assemblies with hBN pressure medium were used. Sample pressure at different temperatures was determined from thermal equation of state of hBN ; temperature was measured by a Pt-10%Rh/Pt thermocouple. The experimental details are described elsewhere .