Melting of Normal Hydrogen Under High Pressures Between 20 and 300 Kelvins

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Science  19 Jun 1981:
Vol. 212, Issue 4501, pp. 1393-1394
DOI: 10.1126/science.212.4501.1393


The melting curve of normal hydrogen has been determined up to 52 kilobars between 20 and 300 Kelvins. The results are in excellent agreement with the modified Simon equation proposed for hydrogen below 19 kilobars, but not with the existing theoretical predictions. The results also provide an independent check on the validity of the ruby high-pressure scale at low temperature.