Euxenite-(y), Columbite-(Fe) & Monazite-(Ce) crystals in Matrix
Weight: 102 Grams
Size: 43x37x25mm
Locality: North Star deposit (Miller deposit), La Jarita-Apache area, Petaca Mining District, Rio Arriba County, New Mexico, USA
The mark on the bottom of this specimen was made by the technician performing the XRF alasysis.
Euxenite-(y) formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Columbite-(Fe) formula: Fe2+Nb2O6
Monazite-(Ce) formula: Ce(PO4)
Euxenite was first described in 1870 and named for from the Greek (εὔξενος), hospitable or friendly to strangers, in allusion to the many rare elements that it contain.
Columbite-(Fe) is a black mineral consisting primarily of iron, tantalum, and niobium. It’s commonly found in igneous rocks and pegmatites. Valued for its tantalum content, it’s used in electronics, aerospace, and medical industries, among others.
Monazite-(Ce) is a reddish-brown mineral rich in cerium, thorium, and other rare earth elements. It’s a significant source of rare earth metals, utilized in electronics, optics, and catalysis.
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