placer deposit, western Chukotka, northeastern Russia. It occurs as (1) relatively large (0.2–0.4 mm)...sorosite, (Cu,Fe)1+x(Sn,Sb), intermetallic compound, nickeline-type stannide, Cu–Sn system, Sn–Sb–Cu mineralization...substitution, gold–PGE placer deposit, Baimka, Chukotka, Russia. SOMMAIRE Nous présentons les résultats de plusieurs...Sb), composé intermétallique, stannure de type nickeline, système Cu–Sn, minéralisation Sn–Sb–Cu, zonation...Sb) and a hexagonal structure close to that of nickeline, NiAs, was discovered in association with Pt–Fe |