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Abstract
The melting curve of ice VII was measured to a maximum pressure of 38GPa (temperature of about 1000 K). Experiments were carried out in an externally heated diamond anvil cell and melting was monitored by the disappearance of X-ray difiraction from ice VII. The melting line of H2O was found to be well described by the Simon equation P = 2.2 + 1.31[(T/365)3.3−1].