Quijarroite
Quijarroite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Cu₆HgPb₂Bi₄Se₁₂.
It crystallizes in the orthorhombic crystal system (space group Pmn2_1).
Key properties: specific gravity 5.771; Black streak; Metallic luster.
IMA symbol Qui, IMA status: approved, named in 2016.
A primary mineral, deposited from an oxidizing, low-temperature hydrothermal fluid in a vein cutting pyrite-rich black shales and reddish-gray, hematite-bearing siltstones.
It is found associated with Watkinsonite, clausthalite, eldragónite, krut’aite-penroseite, eskebornite, klockmannite, umangite, petrovicite, grundmannite, native gold.
The name refers to the province, Antonio Quijarro, where the first specimens were collected.
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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