As part of my work for the 2019 Erice school on Magnetic Crystallography (https://crystalerice.org/2019/programme_mc.php), I have made several updates to this website: There were concerns about how challenging it can be to index magnetic structures. To help I have added : A pdf of “Indexing magnetic structures and crystallographic distortions from powder diffraction: Brillouin zone… Updates for Erice2019