A rare mineral in hausmannite ore from a metamorphosed Fe-Mn orebody (L�ngban, Sweden); in a metamorphosed stratiform zinc orebody (Sterling Hill, New Jersey, USA).
IMA Status:
Valid Species (Pre-IMA) 1922
Locality:
From L�ngban, Varmland, Sweden. At Sterling Hill, Ogdensburg, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.