THE SYSTEM PtS PdS NiS BETWEEN 1200 AND 700 C
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Bibliographic record
Abstract
Results of experimental investigations in the dry system PtS–PdS–NiS between 1200 ° and 700°C are presented. The phases encountered in the experimental runs are synthetic cooperite [(Pt,Pd,Ni)S], synthetic braggite [(Pt,Pd,Ni)S], synthetic vysotskite [(Pd,Pt,Ni)S], quenched sulfide liquid, and Ni1–xS. Synthetic cooperite is stable to temperatures above 1200°C, whereas synthetic braggite is stable at temperatures below 1100°C, and synthetic vysotskite, below 1000°C. Below 900°C in the system PtS–PdS– NiS, Ni-saturated synthetic cooperite, braggite, and vysotskite coexist with Ni1–xS. At 900°C, only Ni-saturated, Pd-free synthetic cooperite coexists with Ni1–xS, and synthetic braggite and Pd-bearing synthetic cooperite coexist with a Pd–Ni–Pt sulfide melt. At temperatures ≥ 1000°C, Ni-saturated synthetic cooperite and braggite coexist with a Pd–Ni–Pt sulfide melt. In the experiments, there is a clearly defined miscibility-gap between cooperite and braggite, but no gap was observed between braggite and vysotskite. The Ni content of braggite and vysotskite with varying Pt:Pd ratio in a Ni-saturated environment is a function of temperature. A higher Ni content indicates a lower temperature of equilibration, and can be estimated using the following equation: T [°C] = 998.07 (±7.88) + 0.05 (±0.02) Pt2 – 4.24 (±0.16) Ni2. In cooperite, a similar relationship between the Ni content and the temperature of equilibration is applicable between 1200 ° and 900°C.
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| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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