Octahedrites

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
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.