Spelling variant of Œrstedtite.
Varietal name used by Forchhammer (1835) for a metamict/altered zircon from Arendal, Aust-Agder, Norway (see also Clark, 1993 - "Hey's Mineral Index").
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.