The Cover Feature portrays tetrafluoridoborate anions dancing in the solid state, performing pirouettes and rotations around multiple axes, as the NMR spectrometer sets the rhythm and observes their thermally activated motion. More information can be found in the Research Article by A. Gradišek and co-workers (DOI: 10.1002/cphc.202500721). Illustration by Francesca Calvisi; concept by Matic Lozinšek.
Gradišek et al. (Fri,) studied this question.