IVB meteorite
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IVB meteorites are a group of ataxite iron meteorites classified as achondrites. The IVB group has the most extreme chemical compositions of all iron meteorites, meaning that examples of the group are
Tlacotepec is one of 14 known IVB specimens; in contrast to most IVBs it is an octahedrite instead of an ataxite
The Hoba meteorite is the largest meteorite specimen ever found.
Kamacite
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Kamacite is an alloy of iron and nickel, which is found on Earth only in meteorites. According to the International Mineralogical Association it is considered a proper nickel-rich variety of the miner
Widmanstätten pattern showing the two forms of nickel-iron minerals, kamacite and taenite
Kamacite and taenite after taenite, exhibiting the octahedral structure of taenite, Nantan (Nandan) iron meteorite, Nandan County, Guangxi Zhuang Autonomous Region, China. Size: 4.8×3.0×2.8 cm. The Nantan irons, a witnessed fall in 1516, have a composition of 92.35% iron and 6.96% nickel.