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An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions
Published on: June 18, 2020
A diamond anvil cell with resistive heating for high pressure and high temperature x-ray diffraction and absorption
Sebastien Pasternak1, Giuliana Aquilanti, Sakura Pascarelli
1European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble, Cedex, France.
Abstract:
In this paper we describe a prototype of a diamond anvil cell (DAC) for high pressure/high temperature studies. This DAC combines the use of a resistive oven of 250 W power in a very small volume, associated with special conical seats for Boehler-type diamond anvils in order to have a large angular acceptance. To protect the diamond anvils from burning and to avoid the oven oxidation, the heated DAC is enclosed in a vacuum chamber. The assemblage was used to study the melting curve of germanium at high pressure (up to 20 GPa) and high temperature (up to 1200 K) using x-ray diffraction and x-ray absorption spectroscopy.
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