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Phase diagram. P,T phase boundary of a mixture of NBu4BF4 (1)+CH3CN (2) + CO2 (3) with x1 = 9 × 10−4, x2 = 0.13, and x3 = 0.87. The inset photo shows a homogeneous phase of the CO2 mixture observed inside the view-cell at the temperature and pressure in the single-phase region. The oval object sitting at the bottom of the view-cell is a magnetic stirrer bar.
