TY - JOUR AB - Non-periodic systems have become more important in recent years, both theoretically and practically. Their description via Delone sets requires the extension of many standard concepts of crystallography. Here, we summarise some useful notions of symmetry and aperiodicity, with special focus on the concept of the hull of a Delone set. Our aim is to contribute to a more systematic and consistent use of the different notions DA - 2012 DO - 10.3390/sym4040566 LA - eng IS - 4 M2 - 566 PY - 2012 SN - 2073-8994 SP - 566-580 T2 - Symmetry TI - On the Notions of Symmetry and Aperiodicity for Delone Sets UR - https://nbn-resolving.org/urn:nbn:de:0070-pub-25311767 Y2 - 2024-11-22T03:34:17 ER -