This description is most accurate for alkali halides and becomes less and less accurate as cationic and anionic charge increase, and as the anion becomes larger and more polarisable.
ðɪs dᵻskɹˈɪpʃən ɪz mˈoʊst ˈækjʊɹət fɔːɹ ˈælkəlˌaɪ hˈælaɪdz ænd bɪkˌʌmz lˈɛs ænd lˈɛs ˈækjʊɹət æz kˌæɾaɪˈɑːnɪk ænd ˌænaɪˈɑːnɪk tʃˈɑːɹdʒ ˈɪŋkɹiːs, ænd æz ðɪ ˈænaɪən bɪkˌʌmz lˈɑːɹdʒɚ ænd mˈoːɹ pˈoʊlɚɹˌaɪzəbəl.