... ); its synthetic analogue ( Purdy, 1998 ), related to the structural type CaAl 2 Si 2 , is known ( Condron et al. , 2007 ). Chvilevaite Na(Cu,Fe,Zn) 2 S 2 , is the only mineral of note among the natural phases ( Kachalovskaya et al. , 1988 ), characterised by a structure similar to dzierżanowskite...

... quaternary As–Pb–Sb–Sn compound forms rims between galena and the metallic melt. (b) Enlargement of the Pb + Sb eutectic with the presence of Ag 3 Sb phase. (c) Matte composed of NiSb crystals with chvilevaite laths within large oval grains of galena within galena + digenite eutectic. (d) Complex matte...