so the IPA for Семья is /sʲɪˈmʲjæ/ (С'ИМ'Я)
No, [с'эм'й'а]

whereas Себя is /sʲɪˈbʲæ/ (С'ИБ'А)
No, [с'эб'а]

Forget your IPA after all. There is no [и] in these words.