khatyrkite

{{Infobox mineral | name = Khatyrkite | category = Native element class, alloy | boxwidth = | image = Khatyrkite sample.png | caption = Khatyrkite sample. | formula = | IMAsymbol = Ktk | strunz = 1.AA.15 | system = Tetragonal | class = Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m) | symmetry = I4/mcm | unit cell = a = 6.06, c = 4.87 [Å]; Z = 4 | color = Gray-yellow (reflection) | habit = Prismatic crystals and intergrowths with cupalite | twinning = | cleavage = {100}, distinct | tenacity = Malleable | mohs = 5–6 | luster = Metallic | diaphaneity = Opaque | opticalprop = Distinctly anisotropic, grayish yellow to brownish red | refractive = | birefringence = | streak = Dark gray | gravity = 4.42 (calculated) | melt = | fusibility = | solubility = | other = | references = }}

Khatyrkite ( ) is a rare mineral which is mostly composed of copper and aluminium, but may contain up to about 15% of zinc or iron. Its chemical structure is described by an approximate formula or . It was discovered in 1985 in a placer in association with another rare mineral cupalite (). These two minerals have only been found at in the area of the Iomrautvaam, a tributary of the Khatyrka river, in the Koryak Mountains, in Anadyrsky District (former Beringovsky District), Chukotka, Russia. Analysis of one of the samples containing khatyrkite showed that the small rock was from a meteorite. A geological expedition has identified the exact place of the original discovery and found more specimens of the Khatyrka meteorite. The mineral's name derives from the Khatyrka () zone where it was discovered. Its type specimen (defining sample) is preserved in the Mining Museum in Saint Petersburg, and parts of it can be found in other museums, such as Museo di Storia Naturale di Firenze.