ɪɾ ɪz ʌnjˈuːʒuːəl ɪn bˌiːɪŋ wˈʌn ʌvðə fjˈuː wˈɔːɾɚɹɪnsˈɑːljuːbəl mˈɛɾəl ˈaɪədˌaɪdz, ɐlˈɔŋ wɪð ˈæɡ ˈaɪ, kˈuː ˈaɪ, ˌɛsˈɛn aɪ tˈuː, ˌɛsˈɛn aɪ fˈoːɹ, pˌiːbˈiː aɪ tˈuː ænd ˌeɪtʃdʒˈiː aɪ tˈuː.
It is unusual in being one of the few water-insoluble metal iodides, along with AgI, CuI, SnI2, SnI4, PbI2 and HgI2.