Their discovery of rubidium came the following year in Heidelberg, Germany, finding it in the mineral lepidolite.
ðɛɹ dɪskˈʌvɚɹi ʌv ɹuːbˈɪdiəm kˈeɪm ðə fˈɑːloʊɪŋ jˈɪɹ ɪn hˈaɪdɪlbˌɜːɡ, dʒˈɜːməni, fˈaɪndɪŋ ɪɾ ɪnðə mˈɪnɚɹəl lˈɛpɪdˌɑːlaɪt.