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and von hevesy's experiment) being zircon ( zirconium silicate ) with up to % hafnium by content. other such zirconium-rich minerals include eudialyte, thortveitite, cyrtolite, armstrongite, alvite, and hafnon; the two elements can also be found in minerals such as the titanium ores ilmenite and rutile
creep ductility, strengthens grain boundaries, and increases corrosion resistance. other applications for hafnium include serving as an oxygen and nitrogen "getter" in vacuum tubes and incandescent lighting, in geological dating (as isotopes), and in organic catalysis. additionally, compounds like hafnium...
https://www.americanelements.com/hf.html