DENSITY, THERMAL-EXPANSION AND COMPRESSIBILITY OF MERCURY

Based on a comparison of the high-accuracy determinations known, the m ost probable estimate of the value of the mercury density at 20-degree s-C and 101 kPa is 13 545,850 kg m-3. However, the relevant individual measurement results differ by relative amounts of up to 3 x 10(-6) fr om one another, so exceeding the uncertainties of 1 x 10(-6) stated by the investigators. The potential causes of these deviations are discu ssed, and the uncertainty of the above value is estimated. As regards the thermal expansion and the compressibility of mercury, the measurem ent results published to date are compared, and the most probable valu es are estimated.