Benyacarite Locality: Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Hagendorf , Waidhaus , Vohenstrauß , Oberpfälzer Wald , Upper Palatinate , Bavaria , Germany ( Locality at mindat.org ) Picture width 0,5 mm. Collection and photo Christian Rewitzer — Photo: Christian Rewitzer · CC BY-SA 3.0
Benyacarite
Benyacarite is an IMA-recognized mineral species in the phosphate class, with the chemical formula KTiMn²⁺₂Fe³⁺₂(PO₄)₄OF·15H₂O.
It crystallizes in the orthorhombic crystal system (space group Pbca).
Key properties: Mohs hardness 2.5–3; specific gravity 2.37; White streak; Vitreous luster; optically biaxial.
IMA symbol Byc, IMA status: approved, named in 1995.
Found as a rare secondary mineral in a complex zoned granite pegmatite.
It is found associated with Phosphosiderite, strengite, pachnolite, apatite, torbernite.
The mineral was named to honor Marı́a Angélica R. de Benyacar (1928–), National Atomic Energy Commission, Buenos Aires, Argentina, for her mineralogical studies.