White crystals of the rare mineral pseudocotunnite from Vesuvius (Monte Somma, Vesuvius, Campania, Italy) on a contrasting dark colored matrix. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY 4.0
Pseudocotunnite
Pseudocotunnite is an IMA-recognized mineral species in the halide class, with the chemical formula K₂PbCl₄.
Key properties: specific gravity 4.25; Dull luster.
IMA symbol Pcot, IMA status: questionable, named in 1873.
Found in volcanic fumaroles.
It is found associated with Tenorite, cotunnite.
Its name comes from the Greek for false, and the mineral’s supposed resemblance to cotunnite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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