Some experiments suggest that the standard consideration of conductivity is not adequate for this material, as its main thermodynamic property is inertia, and conclude that experimental tests should be performed over a longer period of time than usual - preferably with changing thermal jumps.
sˌʌm ɛkspˈɛɹɪmənts sədʒˈɛst ðætðə stˈændɚd kənsˌɪdɚɹˈeɪʃən ʌv kɑːndəktˈɪvᵻɾi ɪz nˌɑːt ˈædɪkwət fɔːɹ ðɪs mətˈɪɹiəl, æz ɪts mˈeɪn θˌɜːmoʊdaɪnˈæmɪk pɹˈɑːpɚɾi ɪz ɪnˈɜːʃə, ænd kəŋklˈuːd ðæt ɛkspˌɛɹɪmˈɛntəl tˈɛsts ʃˌʊd biː pɚfˈɔːɹmd ˌoʊvɚɹ ɐ lˈɔŋɡɚ pˈiəɹɪəd ʌv tˈaɪm ðɐn jˈuːʒuːəl pɹˈɛfɹəbli wɪð tʃˈeɪndʒɪŋ θˈɜːməl dʒˈʌmps.