Natural Chromite Lacework Structures in Allende

Abstract

A strikingly high abundance of submicrometer chromite in Allende acid residues was discovered by Lewis et al in 1975 [1] during early efforts to isolate the carriers of anomalous inert gas components in this meteorite. Subsequent work showed that this chromite is not a significant inert gas carrier, but left its origin and significance unexplained. Housley and Clarke {2] used STEM techniques to image and analyze 20 of these chromite grains and found that they are rounded and irregular in shape and vary widely in composition.

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