Experimental investigation of density of liquid potassium at temperatures up to $1800^{\circ}$ K and pressures up to $100$ atm

The method of a suspended pycnometer was used to make measurements of the density of liquid potassium along the saturation line. The experimental data are analyzed by the least-squares method and approximate equations are obtained. The mean-square deviation of the experimental points with respect to these equations does not exceed $0.12\%$. The results of the experiment are compared with the existing literature data.