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  • Description: Widmanstätten-Figuren (NASA)
Iron meteorites are made almost entirely of iron metal with some nickel. As with stony meteorites, iron meteorites also have fusion crusts and show distinct molten metal shapes and flow markings, like those on the fragment of Sikhote-Alin.
Inside, many iron meteorites are made of criss-crossing intergrown crystals of two different iron-nickel minerals. The sample of the iron meteorite in the Meteorite Sample Disk has an etched surface that shows these patterns. (Photo by Carl Allen, NASA JSC photo S94-43470)


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