hafnon

{{Infobox mineral |name=Hafnon |image=Hafnon.jpg |caption=Very small brown single crystals of hafnon from Bernic Lake, Lac-du-Bonnet District, Manitoba, Canada |category=Nesosilicates |formula= | IMAsymbol = Haf|strunz=09.AD.30|system=Tetragonal|dana=51.05.02.02|class=Ditetragonal Dipyramidal (4/mmm ) H-M symbol: (4/m 2/m 2/m)|symmetry=I41/amd|unit cell=a = 6.5725(7) Å, c = 5.9632(4) Å=; Z = 4|habit=Euhedral to irregular crystals|cleavage={???} Indistinct|mohs=7.5|luster=Vitreous|opticalprop=Uniaxial (+)|refractive=nω = 1.930 - 1.970 nε = 1.980 - 2.030|birefringence=δ = 0.050|streak=grey white|density=6.97|diaphaneity=Transparent|impurities=Often zoned with zircon. Forms part of zircon-hafnon series|colour=Orange-red,brownish yellow, rarely colourless}}

Hafnon is a hafnium nesosilicate mineral with the idealized chemical formula . It is the mineral form of hafnium silicate and one of the few known minerals with essential hafnium.