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Minerals, Volume 14, Issue 12

December 2024 - 120 articles

Cover Story: In this SEM and HRTEM study, the formation of metastable interlayered greigite-pyrrhotite consisting of epitactic segments of parallel cubic and hexagonal close packing of sulfur atoms was discovered to be followed by pyrite neoformation in the sulfidization front of the Gaoping canyon sediments off SW Taiwan. In deeper sediments, mackinawite within iron-monosulfide micronodules is largely preserved, having partial replacement features without neoformed pyrite. The interlayered greigite-pyrrhotite was transformed from mackinawite with an overall topotactic relationship of ⟨110⟩Grg//⟨110 ⟩Po//⟨100⟩Mkw and {111}Grg//(001)Po//~{011}Mkw through interface-coupled dissolution of mackinawite and epitactic reprecipitation of intertwined greigite and pyrrhotite layers, associated with partial oxidation. View this paper
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Minerals - ISSN 2075-163X