Pressure measurement at high temperatures in the diamond anvil cell
- 1 June 1981
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 52 (6) , 3772-3775
- https://doi.org/10.1063/1.329841
Abstract
The frequency shift of the R1 ruby fluorescence peak has been measured in the diamond anvil cell along the ice/water melting curve in the temperature interval 25–200 °C and pressure interval 0–40 kbars. The temperature and pressure coefficients of the frequency shift were found to be independent in this region. Using a least-squares-fitting program to find the fluorescence peak positions, we could reproducibly measure pressures to ±0.2 kbar at 25 °C and to ±0.5 kbar at 300 °C. The temperature coefficient of the frequency shift of R1 in the interval 25–300 °C was determined to be −0.149 cm−1/°K. Large systematic errors in the pressure determination were found to arise when nonuniformity of temperature in the diamond anvil cell caused uncertainty in the ruby temperature.This publication has 6 references indexed in Scilit:
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