Additionally, francium superoxide (FrO2) is expected to have significant covalent character, unlike the other alkali metal superoxides, because of bonding contributions from the 6p electrons of francium.
ɐdˈɪʃənəli, fɹˈænsiəm sˌuːpɚɹˈɑːksaɪd ˌɛfˈɑːɹ ˈoʊ tˈuː ɪz ɛkspˈɛktᵻd tə hæv sɪɡnˈɪfɪkənt kˈoʊvələnt kˈæɹɪktɚ, ʌnlˈaɪk ðɪ ˈʌðɚɹ ˈælkəlˌaɪ mˈɛɾəl sˌuːpɚɹˈɑːksaɪdz, bɪkˈʌz ʌv bˈɑːndɪŋ kˌɑːntɹɪbjˈuːʃənz fɹʌmðə sˈɪks pˈiː ᵻlˈɛktɹɑːnz ʌv fɹˈænsiəm.