kˈæpəɡˈɑː tˈuː ˈoʊ θɹˈiː hɐz ɐn ˌɔːɹθoːɹhˈɑːmbɪk stɹˈʌktʃɚ ænd fˈɔːɹmz wɪð wˈʌnhˈʌndɹɪd twˈɛnti dᵻɡɹˈiːz twˈɪn dəmˈeɪnz, ɹɪzˈʌltɪŋ ɪn hˈɛksɐɡənəl sˈɪmətɹi wˌɪtʃ ɪz ˈɔfən aɪdˈɛntᵻfˌaɪd æz ˈɛpsɪlˌɑːnɡˈɑː tˈuː ˈoʊ θɹˈiː.
κ-Ga2O3 has an orthorhombic structure and forms with 120° twin domains, resulting in hexagonal symmetry which is often identified as ε-Ga2O3.