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The formation of the intermetallic 𝜎 phase (space group 𝑃42/𝑚𝑛𝑚) has a detrimental effect on the ductility of transition-metal alloys. This theoretical study uses first-principles calculations to investigate the stability and thermodynamic properties of the WRe and WOs 𝜎 phases. Our study indicates that the 𝜎 phase becomes thermodynamically stable at its ideal composition for temperature
