Determination of the enthalpies of formation of some platinum antimonides and their phase diagrams under standard conditions |
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| Authors: | E G Osadchii T A Stolyarova M V Voronin E A Brichkina |
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| Institution: | 1.Institute of Experimental Mineralogy,Russian Academy of Sciences,Chernogolovka, Moscow oblast,Russia |
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| Abstract: | Using the method of direct synthesis calorimetry, we determined the standard enthalpy of formation of PtSb (stumpflite), Δ f H°298.15 (PtSb, cr) =–105.16 ± 0.84 kJ/mol and PdSb2 (geversite), Δ f H°298.15 (PtSb2,cr) =–160.92 ± 0.84 kJ/mol. Isothermal (298.15 K, p = 1 bar) phase diagrams were computed for the Pt–Sb–S and Pt–Sb–O ternary systems in the coordinates composition of the Pt–Sb binary system versus fugacity of a gaseous volatile component (O2, S2). |
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