Professor Alajos Kálmán passed away on 26th December 2017.

He was one of the most prominent scientists in crystallography of our time.

He was a most productive, widely respected, much-admired and inspiring scientific leader.

We recall him as an enthusiastic and entertaining head, colleague, teacher and friend who loved crystallography and made a huge contribution to it.

We treasure our memories with him.

He will be missed by the crystallographic community.