Widmanstätten pattern

Widmanstätten pattern

Fig. 12.24 . 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 and 200 kilometers in radius. This sliced specimen is about 0.05 meters across. (Courtesy of the Smithsonian Institution.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University