Steven van Terwingen studied chemistry at RWTH Aachen University from 2013 on. He finished his Master degree under supervision of Ulli Englert in 2018 and is currently working on his Ph. D. thesis in the same group. He has a keen interest in crystal chemistry including crystal engineering, catalysis and structural aspects elucidated by diffraction methods.
	Daniel Brüx was born in 1999 and studies chemistry at RWTH since 2018. He is currently working on his bachelor thesis under the supervision of Steven van Terwingen in the Englert group, in which he investigates the crystal chemistry of N-aryl pyrazolyl substituted acetylacetonates. His main interests are coordination chemistry and developing new crystallization procedures.
	Ruimin Wang joined RWTH with a B. Sc. degree form Nankai University, China and obtained her Ph. D. with Ulli Englert in 2000. Her main area of interest as a senior scientist is experimental electron density and the application of high resolution diffraction data for the understanding of intra- and inter-molecular interactions.
	Ulli Englert has fallen in love with diffraction methods decades ago as a student in Tübingen and Pisa. His chemical crystallography group in RWTH is involved in the synthesis of building blocks for extended structures and in the characterization of the products, both in the home lab and at large research facilities.