Premium
An Experimental Study on Three Quaternary Phases in the Fe‐Sn‐Sb‐S System: Pb‐Free Franckeite, Pb‐Free Cylindrite and (Fe, Sb)‐Ottemannite s.s.
Author(s) -
Jiuling Li,
Jiashan Huang,
Kezi Zhou,
Guilan Zhang
Publication year - 1988
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.1988.mp1004004.x
Subject(s) - homogeneous , tin , phase (matter) , antimony , solid solution , materials science , analytical chemistry (journal) , chemistry , crystallography , mineralogy , metallurgy , thermodynamics , physics , environmental chemistry , organic chemistry
Experimental studies on the two solid solutions franckeite s.s. and cylindrite s.s. yielded among others the Pb‐free endmembers of franckeite and cylindrite respectively. In these endmembers the lead content of the two mineral phases are completely substituted by bivalent tin. A third phase, ottemannite s.s. with (Fe, Sb)‐bearing compositions, was further identified in the Pb‐free 4‐component system Fe‐Sn‐Sb‐S. Pb‐free franckeite and cylindrite could only be synthesized as homogeneous phases at high temperatures. The ottemannite s.s. was obtained at 600°C but an extensive existing range was also confirmed at temperatures below 500°C. The phase relations were discussed in the pseudoternary subsystem SnS‐SnS 2 ‐FeSb 2 S 4 . The following sequence of Pb‐ free phases and phase assemblages were observed under increasing Sn 4+ content at 600°C : herzenbergite (SnS)+franckeite, franckeite, franckeite+cylindrite, cylindrite, cylindrite+(Fe, Sb)‐ottemannite, (Fe, Sb)‐ottemannite, (Fe, Sb)‐ ottemannite+berndtite (SnS 2 ). The assemblage cylindrite+berndtite was identified in synthetic systems involving Pb. The phase Fe, Sb‐ottemannite s.s. appears to be stable only under Pb‐de‐ficient and high sulfur fugacity conditions.