No more accidental sulfur crystal structure discoveries 🫢

A quasar or supernova in the Fourier space.

While working on these structures, I encountered disorder, non-merohedric and pseudo-merohedric twins, cases where the unit cell’s metric symmetry exceeds that of the crystal, and other crystallographic complications. It has been a fascinating and rewarding experience! #research

Most of these structures were collected at room temperature on a Gemini S diffractometer (@rigakuoxfordxrd.bsky.social) assembled in 2007. The dataset comprises mainly coordination compounds with organic ligands, as well as various organic molecules, including natural product derivatives.

Milestone: my 200th deposited crystal structure is now in the CCDC @ccdc.cam.ac.uk (first one in 2012 CCDC 870175, latest today CCDC 2483173). Over the past 13 years, the database has almost tripled in size - adding 1.6 million entries! 🧵👇
#crystallography #CSD #Xray #chemistry #diffraction

Even the clearest scientific rules rarely hold without exception. #crystallography

I have sent ScienceDirect the following questions and asked them to take down their harmful AI feature. Let’s see what they answer.

"It's a riddle wrapped in a mystery inside an enigma..." 😂

I hope you enjoyed my little #tiling voyage a few weeks ago 😊 Now you can admire some of the protagonists in this contribution to @iucrj.iucr.org Newsletter, along with some thoughts inspired by me being an irredeemable #PatternSeeker ❄️

www.iucr.org/news/newslet...
#BraggYourPattern

George M. Sheldrick (1942–2025) In memory of George Sheldrick.

"In 2019, at the ECM in Vienna [...] a crystallographer in the audience improvised a concise speech thanking George for the contribution in his programs, which was unanimously backed by a standing ovation."

I was present there and vividly remember this moment.

doi.org/10.1107/S205...