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Rev. Sci. Instrum. 46, 973 (1975); http://dx.doi.org/10.1063/1.1134381 (7 pages)

Ultrahigh pressure diamond‐anvil cell and several semiconductor phase transition pressures in relation to the fixed point pressure scale

G. J. Piermarini and S. Block

Institute for Materials Research, National Bureau of Standards, Washington, DC 20234

A diamond‐anvil type optical cell of improved design has produced static pressures in gasketed samples up to 500 kilobar as measured by the ruby fluorescence technique. The ruby R1 line pressure shift is linear to 291 kilobar, and the maximum measured shift is extrapolated to 500 kilobar assuming continued linearity of the pressure dependence. The ultimate pressure capability of this diamond cell has not been established. Transition pressures in the semiconductors Si, ZnSe, ZnS, and GaP measured by the ruby method indicate that the revised 1970 fixed point scale and the ruby (NaCl) scale diverge above 135 kilobar and disagreement may be by as much as a factor of 2 in the 500 kilobar range with the ruby scale defining the lower pressure.

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PACS

  • 07.35.+k

    High-pressure apparatus; shock tubes; diamond anvil cells

  • 64.90.+b

    Other topics in equations of state, phase equilibria, and phase transitions (restricted to new topics in section 64)

ARTICLE DATA

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

For access to fully linked references, you need to log in.
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