• journal_title：The Canadian Mineralogist
• Contributor：Anna Vymazalová ; Milan Drábek
• Publisher：Mineralogical Association of Canada
• Date：2011-
• Format：text/html
• Language：en
• Identifier：10.3749/canmin.49.6.1679
• journal_abbrev：Can Mineral
• issn：0008-4476
• volume：49
• issue：6
• firstpage：1679
• section：Articles

The phase equilibria in the system Pd–Pb–Te was studied by the evacuated-silica-tube method, electron-microprobe and X-ray powder-diffraction analyses. We investigated the 400°C isothermal section. The phase PdTe, the analogue of kotulskite, forms an extensive solid-solution and dissolves up to 30.2 at.% Pb; the phase Pd₉Te₄, the analogue of telluropalladinite, dissolve up to 2.3 at.% Pb, and the phase Pd₂₀Te₇ dissolves up to 5.5 at.% Pb. The phase Pd₁₃Pb₉ dissolves up to 2.1 at.% Te, and the phase Pd₅Pb₃, up to 7.7 at.% Te. Lead substitutes for tellurium. In the system Pd–Pb–Te, there are two ternary phases: Pd₃Pb₂Te₂, the analogue of pašavaite, and Pd₇₁Pb₈Te₂₁, not known to occur in nature. Pašavaite forms a stable association with kotulskite solid-solution in a compositional range from 25 to 30 at.% Pb and altaite. Phase Pd₇₁Pb₈Te₂₁ forms a narrow solid-solution; its Pd content varies between 69.5 and 71.2 at.%, its Pb content, over the range 4.6 and 10.7, and its Te content, over the range 19.8 and 25.0 at.%. The phase Pd₇₁Pb₈Te₂₁ forms stable assemblages with zvyagintsevite, telluropalladinite_ss, kotulskite_ss and Pd₂₀Te_7ss. Thus, such associations can be expected to occur in nature. Apart from the ternary phases, the binary phases PdPb₂, PdPb, Pd₁₃Pb₉, Pd₅Pb₃, Pd₃Te₂, Pd₂₀Te₇, and Pd₁₇Te₄ can be expected to occur in nature in close association with other platinum-group minerals, in particular with known minerals of the system Pd–Pb–Te.