ʌv ðiːz pˈɑːlɪmˌoːɹfz bˈeɪɾəɡˈɑː tˈuː ˈoʊ θɹˈiː ɪz ðə mˈoʊst θˌɜːmoʊdaɪnˈæmɪkli stˈeɪbəl fˈeɪz æt stˈændɚd tˈɛmpɹɪtʃɚ ænd pɹˈɛʃɚ wˌaɪl ˈælfəɡˈɑː tˈuː ˈoʊ θɹˈiː ɪz ðə mˈoʊst stˈeɪbəl pˈɑːlɪmˌoːɹf ˌʌndɚ hˈaɪ pɹˈɛʃɚz.
Of these polymorphs β-Ga2O3 is the most thermodynamically stable phase at standard temperature and pressure while α-Ga2O3 is the most stable polymorph under high pressures.