Chiral microporous rare-earth silico-germanates: Synthesis, structure and photoluminescence properties

► First examples of chiral small-pore rare-earth silico-germanates. ► Isomorphous substitution of Si4+ by Ge4+ shown by single-crystal XRD and 29Si NMR. ► Detection by Eu3+ photoluminescence spectroscopy of quasi-enantiomeric domains.