Phase relation of some sulfide systems-(6) : especially Pb-Sb-S ternary system

Phase relation studies for ternary Pb-Sb-S system have been performed by author and some students at Yamaguchi and Tohoku Universities. Their results are mainly reported as some phase diagrams. This paper is described the new phase diagram including some additional data. Phase relations of the PbS-Sb_2S_3 pseudo system from 700 to 270℃ carried by evacuated silica glass tube and hydrothermal synthetic methods were obtained as seen in Fig. 3. Also, the phase relations for Pb-Sb-S ternary systems determined at 600, 500, 400, 370, 300 and 270℃ using dry and hydrothermal methods. From these experiments, synthetic phases such as I (Pb_{16}Sb_{10}S_{31}), H (Pb_3Sb_4S_6), F (Pb_2Sb_2S_5), E (Pb_7Sb_8S_{19}), D (Pb_5Sb_6S_{14}), and acicular group minerals such as boulangerite (Pb_5Sb_4S_{11}), robinsonite (Pb_4Sb_6S_{13}) and zinkenite (Pb_9Sb_{22}S_{42}), and prismatic semseyite group minerals (Pb_{9-2x}Sb_8S{21-2x}) as semseyite (x=0), heteromorphite (x=2), plagionite (x=3) and fuloppite (x=4) were obtained.

PbS-Sb_2S_3 join

Pb-Sb-S ternary system

lead-antimony sulfosalt minerals