Te-canfeldite was found in assemblage with pyrite, marcasite, hessite, and Tl sulfosalts in the ores of the Fedorovskaya vein zone of the Lunnoe Au-U deposit, Aldan shield (Yakutia). The mineral forms anhedral inclusions in vein matrix. Its refection spectrum is characterized by weak normal dispersion, the dispersion curve is almost parallel to the canfeldite curve, but the refectivity value is signifcantly higher. A sustained S:Te ratio of Te-canfldite is consistent with the analytical data for most mineral localities (Lengenbach, Sirotan, Nikolayevskoye, Uryakh). It is suggested that Te-canfeldite is formed in a wide range of geological settings.
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