Gold(III) sulfide or auric sulfide is an inorganic compound with the formula Au2S3. Auric sulfide has been described as a black and amorphous solid.[1] Only the amorphous phase has been produced, and the only evidence of existence is based on thermal analysis.
Claims
Early investigations claimed to prepare auric sulfide by the reaction of lithiumtetrachloroaurate with hydrogen sulfide:
^Antony, U.; Lucchesi, A. (11 July 1890). "Del sulfuro aurico Au2S3" [On the gold sulfide Au2S3]. Gazzetta Chimica Italiana (in Italian): 601–606 – via HathiTrust.