Abstract
A high-temperature technique was developed for vapor pressure determination of solid and liquid γ-La2S3 (we called it the boiling point technique). Melting temperatures and total vapor pressures were measured for incongruently vaporizing γ-La2S3 at 1853–2210 K and 0.3–3.0 atm pressures. Having compared the slopes of the log p(S2) versus 1/T plots measured by various techniques, we recommend the equation log p(S2) [atm] = (6.31 ± 0.15) − (12720±310)T −1 for T = 1021–2013 K as the most reliable for practical use.
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