ˈɔfən ðə hˌɛksɐflˌʊɹɹoʊluːmˈɪnɪk ˈæsɪd, wˌɪtʃ ɪz ɹᵻkˈʌvɚd fɹʌm fˈɑːsfeɪt mˈaɪnɪŋ, ɪz ðə pɹɪkˈɜːsɚɹ ɪn ɐ tˈuːstˈɛp pɹˈɑːsɛs bɪɡˈɪnɪŋ wɪð nˌuːtɹəlᵻzˈeɪʃən wɪð æmˈoʊniə tə ɡˈɪv æmˈoʊniəm hˌɛksɐflˌʊɹɹoʊlˈuːmᵻnˌeɪt:
Often the hexafluoroaluminic acid, which is recovered from phosphate mining, is the precursor in a two-step process beginning with neutralization with ammonia to give ammonium hexafluoroaluminate: