ðˈʌs, pɹˈɛzəns ʌv ɪmpjˈʊɹɹᵻɾiz mˌaɪt biː ɹᵻspˈɑːnsᵻbəl fɔːɹ kˌoʊɛɡzˈɪstəns ʌvðə kjˈuːbɪk ænd ˌɔːɹθoːɹhˈɑːmbɪk fˈeɪzᵻz æɾ ˈæmbiənt kəndˈɪʃənz.
Thus, presence of impurities might be responsible for coexistence of the cubic and orthorhombic  phases at ambient conditions.