Fougèrite
The natural form of green rust — a layered iron double-hydroxide and the archetype of its group.
Intro adapted from Wikipedia (CC BY-SA).
Fougèrite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Fe²⁺₄Fe³⁺₂(OH)₁₂(CO₃)·3H₂O.
It crystallizes in the hexagonal crystal system (space group R-3m). It is a member of the Hydrotalcite structural group.
IMA symbol Fgè, IMA status: approved, named in 2003.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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