When etched with acid, what distinctive crystal patterns form in the iron-nickel matrix of Iron meteorites?

Answer

Widmanstätten figures

Widmanstätten figures are specific crystal patterns revealed in the iron-nickel matrix of iron meteorites upon etching, which form only through extremely slow cooling deep inside a parent body.

When etched with acid, what distinctive crystal patterns form in the iron-nickel matrix of Iron meteorites?

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