wˈʌn mˈɛθəd ʌv pɹɪpˈɛɹɪŋ ɡˈɑː bˌiːˈɑːɹ θɹˈiː ɪz tə hˈiːt ˌɛlɪmˈɛntəl ɡˈæliəm ɪnðə pɹˈɛzəns ʌv bɹˈoʊmaɪn lˈɪkwɪd ˌʌndɚ vˈækjuːm.
One method of preparing GaBr3 is to heat elemental gallium in the presence of bromine liquid under vacuum.