Aletai
The Armanty fragment in front of the Xinjiang Geological and Mineral Museum in Ürümqi.
Type	Iron
Structural classification	Coarse octahedrite
Group	IIIE-an
Composition	9.8% Ni, 0.52% Co, 109 ppmCu, 16.9 ppm Ga, 14.4 ppm As, 1.81 ppm Au, 0.228 ppm Ir[a]
Country	China
Region	Xinjiang
Coordinates	45°52′16″N 90°30′17″E[a]
Observed fall	No
Found date	1898[a]
TKW	~74,500 kg[1]
Strewn field	Yes
A small fragment of the Aletai meteorite with visible Widmanstätten patterns on display at the Tianjin Natural History Museum.
Related media on Wikimedia CommonsThe Aletai meteorite, previously also known as the Armanty  meteorite, is one of the largest known iron meteorites, classified as a coarse octahedritein chemical group IIIE-an.[b] In addition to many small fragments, at least five main fragments with a total mass over 74 tonnes have been recovered, the largest weighing about 28 tonnes.[1]

among the irons of the Aletai meteorite, three pieces can be distinguished, which at the moment apparently occupy the 5th, 6th and 9th places among the largest meteorites found on Earth.^[3] The corresponding strewn field along its long axis is at least 430 km (and presumably even larger). It is by a margin the largest meteorite debris scattering field found on the planet, believed to be due to its unique stone skipping-like trajectory.^[4]