Pumpellyite-(Fe3+)

Ca2Fe3+Al2(Si2O7)(SiO4)(OH,O)2·H2O

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Pumpellyite-(Fe3+) is the ferric iron-dominant member of the pumpellyite group of sorosilicates, occurring in oxidized low-grade metamorphic and hydrothermally altered volcanic sequences. It forms dark brownish-green to reddish-brown prismatic crystals or fibrous aggregates, distinguished from the Fe2+ member by its oxidized iron valence state. The mineral provides information about redox conditions during low-temperature metamorphism in subduction-related terranes.

Frequently Asked Questions

What is the chemical formula of Pumpellyite-(Fe3+)?
The chemical formula of Pumpellyite-(Fe3+) is Ca2Fe3+Al2(Si2O7)(SiO4)(OH,O)2·H2O.