Widmanstätten pattern

Widmanstätten pattern

. When polished and etched with acid, an iron meteorite displays this distinctive Widmanstätten pattern produced by crystals of two different iron-nickel alloys. The pattern provides evidence that this meteorite was once buried within a parent body between 50 thousand and 200 thousand meters radius. This sliced specimen is about 0.05 meters across. (Courtesy of the Smithsonian Institution.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University