mˈoːɹ ɹˈiːsənt tˈɛsts hɐvbɪn ˈeɪbəl tə kəŋklˈuːsɪvli pɹˈuːv ðætðə sˈʌbstəns hɐz ɐn ˈiːvən hˈaɪɚ mˈɛltɪŋ pˈɔɪnt ʌv θɹˈiː,nˈaɪnhˈʌndɹɪd fˈɪfti ˈeɪt dᵻɡɹˈiːz sˈiː ɛksˈiːdɪŋ ðoʊz ʌv tˈæntæləm kˈɑːɹbaɪd ænd tˈæntæləm hˈæfniəm kˈɑːɹbaɪd wˌɪtʃ wɜː bˈoʊθ pɹˈiːviəsli ˈɛstᵻmˌeɪɾᵻd təbi hˈaɪɚ.
More recent tests have been able to conclusively prove that the substance has an even higher melting point of 3,958 °C exceeding those of tantalum carbide and tantalum hafnium carbide which were both previously estimated to be higher.