This article is part of a focused issue presenting articles on Quantum Crystallography from various IUCr journals in celebration of the 100th anniversary of the
Hartmut Bärnighausen was born in February 1933 in Chemnitz, Saxony, Germany. He studied chemistry at the University of Leipzig, which was in the German Democratic Republic at that time.
The IUCr-UNESCO São Carlos OpenLab 2024 was held at the São Carlos Institute of Physics of the University of São Paulo, São Carlos, SP, Brazil from 2nd to 8th December 2024.
