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Akimotoite: (Mg,Fe)SiO3
Comments: Electron micrograph of akimotoite (Ak) as columnar grains. Aggregates of akimotoite are adjacent to a large clinoenstatite grain (Cen) with (100) twin lamallae. (AmMin 84:268). Location: Shock-metamorphosed Tenham chondrite. Scale: See Image. © American Mineralogist