In addition, the small size of the Li+ and O2− ions contributes to their forming a stable ionic lattice structure.
ɪn ɐdˈɪʃən, ðə smˈɔːl sˈaɪz ʌvðə lˈaɪ plˈʌs ænd ˈoʊ tˈuː mˈaɪnəs ˈaɪɑːnz kəntɹˈɪbjuːts tə ðɛɹ fˈɔːɹmɪŋ ɐ stˈeɪbəl aɪˈɑːnɪk lˈæɾɪs stɹˈʌktʃɚ.