Striated grey metallic raguinite crystals on realgar from the type locality Allchar. From: Crven Dol Mine, Allchar, Roszdan, Macedonia (former Yugoslav Republic). Raguinite is a very rare thallium mineral. — Photo: David Hospital · CC BY-SA 4.0
Raguinite
Raguinite is an IMA-recognized mineral species in the sulfide class, with the chemical formula TlFeS₂.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: Metallic luster.
IMA symbol Rgu, IMA status: approved, named in 1968.
Formed in a hydrothermal deposit.
It is found associated with Pyrite, lorandite, orpiment, realgar, vrbaite.
The name refers to Professor E. Raguin, National School of Mines, Paris, France. Type Material: National School of Mines, Paris, France.
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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