Octahedrites

Octahedrites

 

iron meteorites with an average nickel content of 6–13 percent. Octahedrites consist of three structural components: kamacite (α-iron), taenite (γ-iron), and plessite, a fine-grained intergrowth of kamacite and taenite. Widmanstätten structure appears on the polished surface of octahedrites upon etching with a solution of nitric acid or any other acid.

References in periodicals archive ?
The size and shape of the interlocking bands, known as lamellae, can be analysed to classify iron meteorites by their structure as octahedrites, hexahedrites or ataxites.
Volume rendering of one of the samples, the Muonionalusta, allowed the investigators to characterise the kamacite lamellae and confirm the meteorite had a fine octahedrite structure.
Depending on the amount of nickel they contain and the ratio of nickel to iron, iron meteorites consist of three main types: hexahedrites, octahedrites, and ataxites.