Mendigite Field of view: 1 mm Locality: In den Dellen quarries (TL), Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany — Photo: Henk Smeets – tomeikminerals.com · CC BY 4.0
Mendigite
Mendigite is an IMA-recognized mineral species in the silicate class, with the chemical formula Mn₂Mn₂MnCa(Si₃O₉)₂.
It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Wollastonite structural group.
Key properties: specific gravity 3.56; Brown streak; Vitreous luster; optically biaxial.
IMA symbol Mdg, IMA status: approved, named in 2014.
A pneumatolitic phase in miarolitic cavities in sanidinite.
It is found associated with Sanidine, nosean, rhodonite, tephroite, magnetite, a pyrochlore-group mineral.
The name refers to Mendig, the town in Germany, near the quarry that produced the first specimens.