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Formula: TlFeS2
Sulphide, thallium-bearing mineral
Crystal system: Orthorhombic
Specific gravity: 6.4 measured, 6.29 calculated
Colour: Bright bronze
Solubility: Very slowly attacked by dilute nitric acid
WARNING: Contains thallium, very toxic!
Environments
Raguinite is a dithioferrate mineral: a sulfosalt that contains the
[FeS2]− anion with iron in the Fe3+ state. Other known natural dithioferrates are
erdite and hanswilkeite
(AM 110.6.956–965).
Localities
At the type Locality, Allchar, Ržanovo, Kavadarci Municipality, North Macedonia, raguinite occurs in
pseudohexagonal plates, pseudomorphs after an unknown mineral; these
consist of bundles of bronze-coloured fibres intimately mixed with pyrite.
As well as pyrite, other associated minerals include
lorandite, orpiment,
realgar and vrbaite
(AM 54.1495-1499).
Raguinite from Allchar - Image
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