Durante il 34^th European Crystallographic Meeting (ECM34) il Professor Piero Macchi è stato insignito del Alajos Kálmán Prize istituito dalla Hungarian Chemical Society e promosso dall'European Crystallographic Association (ECA).

Motivazione: «Professor Piero Macchi has made fundamental and ground-breaking contributions to both Quantum Crystallography and Extreme Conditions Crystallography. His research includes the development of computational tools available to all charge density scientists. He has advanced the technique and boundaries of what one can do in experimental charge density measurements. His work leads to new experimental capabilities at the upgraded Swiss Light Source. He has an impressive record of high-impact publications, he made substantial contributions to the crystallographic community, and he has supervised numerous young researchers».