Figure 2: Melting point determinations and predictions for tantalum. The data of Ref. [2] are from earlier LHDAC results and are similar to that of Ref. [4]. References [6, 7, 8] are theoretical predictions for bcc $Ta$. Reference [8] 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.