Schwertmannite is an iron-oxyhydroxysulfate mineral with an ideal chemical formula of or . It is an opaque tetragonal mineral typically occurring as brownish yellow encrustations. It has a Mohs hardness of 2.5 – 3.5 and a specific gravity of 3.77 – 3.99.
Schwertmannite is an iron-oxyhydroxysulfate mineral with an ideal chemical formula of or . It is an opaque tetragonal mineral typically occurring as brownish yellow encrustations. It has a Mohs hardness of 2.5 – 3.5 and a specific gravity of 3.77 – 3.99.
It was first described for an occurrence in Finland in 1994 and named for Udo Schwertmann (born 1927), a soil scientist at the Technical University of Munich, Munich, Germany.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).