A.D. Fortes, I.G. Wood, M. Alfredsson, L. Vočadlo, K.S. Knight, W.G. Marshall, M.G. Tucker, and F. Fernandez-Alonso, The high-pressure phase diagram of ammonia dihydrate, High Press. Res. 27 (2007), pp 201–212 (doi:10.1080/08957950701265029).
It has recently come to our attention that there is a typographical error in the Appendix to the above work, in which we report a parameterization of the Pb equation of state. Specifically, the coefficients describing the temperature dependence of the bulk modulus have been printed with the incorrect sign.
On page 212, lines 10–11 of the Appendix should read
, where K
0, 0=48.80 GPa,
GPa K−1,
GPa K−2.
This equation of state has been used many times to determine pressures in the Paris–Edinburgh high pressure cell, implemented in a spreadsheet available to the user community on the PEARL/HiPr beamline at the ISIS neutron spallation source. We have established that the spreadsheet has always employed the correct values of the aforementioned coefficients, and the error lies solely in the values reported in our paper.
The authors apologise for the error and for any confusion caused.