Smithsonian Report. 1942. Henderson and Perry 



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Plate 5 



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ATAXITE STRUCTURES. 





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This group of nickel-rich ataxites presents a varied and radically different structural pattern from that of 

 the other types. At the hisih magnifications shown, the appearance is quite dilVerent from that of speci- 

 mens seen by the unaided eye. These patterns consist of closely spaced taenite areas in a ground mass 

 of kamacite. The taenite in the plate is somewhat darker than the kamacite. 



a, Nordhcim, Te.x. (X 500); 6, Hoba, Southwest Africa (X 1,000); c, Iquique, Chile (X 1,000); rf, Tlacotepec, 



Mexico (X 100). 



The white inclusions in Tlacotepec are kamacite; stich areas occur sparingly in nickel-rich ataxites. At 

 higher magnification this structure would be almost identical with that of Iquiquc. C'liemical composi- 

 tions are shown in table 3. 



