Lithium fluoride is the only alkali metal halide that is poorly soluble in water, and lithium hydroxide is the only alkali metal hydroxide that is not deliquescent.
lˈɪθiəm flˈʊɹɹaɪd ɪz ðɪ ˈoʊnli ˈælkəlˌaɪ mˈɛɾəl hˈælaɪd ðæt ɪz pˈʊɹli sˈɑːljuːbəl ɪn wˈɔːɾɚ, ænd lˈɪθiəm haɪdɹˈɑːksaɪd ɪz ðɪ ˈoʊnli ˈælkəlˌaɪ mˈɛɾəl haɪdɹˈɑːksaɪd ðæt ɪz nˌɑːt dᵻlɪkwˈɛsənt.