As a result of its extreme rarity in nature, most francium is synthesised in the nuclear reaction 197Au
æz ɐ ɹɪzˈʌlt ʌv ɪts ɛkstɹˈiːm ɹˈɛɹəɾi ɪn nˈeɪtʃɚ, mˈoʊst fɹˈænsiəm ɪz sˈɪnθəsˌaɪzd ɪnðə nˈuːklɪɹ ɹɪˈækʃən wˈʌnhˈʌndɹɪd nˈaɪnti sˈɛvən ˌoʊ