Melting point determinations and predictions for tantalum. The data of Ref.  are from earlier LHDAC results and are similar to that of Ref. . References [6, 7, 8] are theoretical predictions for bcc Ta. Reference  gives the predicted melting curve for another phase, a hex-ω structure, which is expected to have a lower free energy and may result from a solid-solid transition in tantalum at high temperature.