Investigation of oxide crystals by means of synchrotron and conventional X-raydiffraction topography Wojciech Wierzchowski, Agnieszka Malinowska, Krzysztof Wieteska, Edyta Wierzbicka, Krystyna Mazur, Maria Lefeld - Sosnowska, Marek Świrkowicz, Tadeusz Łukasiewicz.