1. Laboratory of Thermal Analysis, Department of Inorganic Chemistry, Wrocław Medical University, Szewska 38, 50 139 Wrocław, Poland; Department of Physics, Ivanovo State University of Chemistry and Technology, F. Engels av. 7, 153460 Ivanovo, Russia; and The W.Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50 950 Wrocław, Poland