Argesite
Argesite is an IMA-recognized mineral species in the organic mineral class, with the chemical formula (NH₄)₇Bi₃Cl₁₆.
It crystallizes in the hexagonal crystal system (space group R-3c).
Key properties: specific gravity 2.88; White streak; Vitreous luster; optically uniaxial.
IMA symbol Age, IMA status: approved, named in 2011.
Forms as a sublimate around an active volcanic fumarole.
It is found associated with Bismuthinite, adranosite, brontesite, demicheleite-(Br), demicheleite-(Cl), panichiite.
The name commemorates Uranus’s son Arges, one of the three Cyclops who were helpers of Hephaistos.
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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