It is with the greatest sadness, that we inform you of the death of prof. dr. sc. Stanko Popović, member of Croatian Academy of Sciences and Arts, and one of the founders of the Croatian Association of Crystallographers. Prof. Popović has left us today, on Friday, December 18th, 2020, at the age of 83. Prof. Popović was a genuine guardian angel of our Association to the very end. He was tirelessly working on our projects, supporting them, and encouraging everyone. The death of Academician Popović is an irreparable loss for the Croatian Association of Crystallographers, for Croatian crystallography, and for Croatian science in general. May he rest in peace.

Dr. Aleksandar Višnjevac