Editing Octahedrite (section)

==Subgroups==
[[File:ZacatecasMeteoriteGDL cropped.JPG|thumb|280px|The Zacatecas Meteorite found in 1782 in Zacatecas Mexico, weighing 780kg.]]
{{see also|Iron meteorite#Structural classification}}
Octahedrites can be grouped by the dimensions of kamacite lamellae in the [[Widmanstätten pattern]], which are related to the [[nickel]] content:<ref>James H. Shirley,Rhodes Whitmore Fairbridge, ''Encyclopedia of planetary sciences'', Springer, 1997. {{ISBN|978-0-412-06951-2}}</ref>
* Coarsest octahedrites, lamellae width >3.3&nbsp;mm, 5–9% Ni, symbol Ogg
* Coarse octahedrites, lamellae 1.3–3.3&nbsp;mm, 6.5–8.5% Ni, symbol Og
* Medium octahedrites, lamellae 0.5–1.3&nbsp;mm, 7–13% Ni, symbol Om
* Fine octahedrites, lamellae 0.2–0.5&nbsp;mm, 7.5–13% Ni, symbol Of
* Finest octahedrites, lamellae <0.2&nbsp;mm, 17–18% Ni, symbol Off
* Plessitic octahedrites, kamacite spindles, a transitional structure between octahedrites and [[ataxite]]s,<ref>Geochimica et Cosmochimica Acta, Volume 45, Ed. 9–12</ref> 9–18% Ni, symbol Opl