Small but outstanding specimen of the extremely rare mineral paulmooreite from the TL in Langban (Långban, Filipstad, Värmland County, Sweden), and the only non slag locality worldwide. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Paulmooreite
Paulmooreite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Pb₂As³⁺₂O₅.
It crystallizes in the monoclinic crystal system (space group P2_1/a).
Key properties: Mohs hardness 3; specific gravity 6.95; White streak; Adamantine luster; optically biaxial.
IMA symbol Pmo, IMA status: approved, named in 1978.
Found as a very rare secondary mineral in a metamorphosed Fe–Mn orebody (Långban, Sweden).
It is found associated with Hematite, magnetite, andradite, mimetite, calcite (Långban, Sweden).
The mineral was named to honor Professor Paul Brian Moore (1940–), American mineralogist and structural crystallographer, University of Chicago, Chicago, Illinois, USA.