Articles | Volume 36, issue 3
https://doi.org/10.5194/ejm-36-473-2024
https://doi.org/10.5194/ejm-36-473-2024
Research article
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14 Jun 2024
Research article | Highlight paper |  | 14 Jun 2024

The use of MgO–ZnO ceramics to record pressure and temperature conditions in the piston–cylinder apparatus

Nicholas Farmer and Hugh St. C. O'Neill

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Cited articles

Akella, J.: Quartz = coesite transition and the comparative friction measurements in piston-cylinder apparatus using talc-alsimag-glass (TAG) and NaCl high-pressure cells, Neues Jb. Miner. Monat., 5, 217–224, 1979. 
Beyer, C., Rosenthal, A., Myhill, R., Crichton, W. A., Yu, T., Wang, Y., and Frost, D. J.: An internally consistent pressure calibration of geobarometers applicable to the Earth's upper mantle using in situ XRD, Geochim. Cosmochim. Ac., 222, 421–435, https://doi.org/10.1016/j.gca.2017.10.031, 2018. 
Bohlen, S. R. and Boettcher, A. L.: The quartz-coesite transformation: a precise determination and the effects of other components, J. Geophys. Res.-Sol. Ea., 87, 7073–7078, https://doi.org/10.1029/JB087iB08p07073, 1982. 
Bose, K. and Ganguly, J.: Quartz-coesite transition revisited: Reversed experimental determination at 500–1200 °C and retrieved thermochemical properties, Am. Mineral., 80, 231–238, https://doi.org/10.2138/am-1995-3-404, 1995. 
Boyd, F. R. and England, J. L.: Apparatus for phase-equilibrium measurements at pressures up to 50 kilobars and temperatures up to 1750 °C, J. Geophys. Res., 65, 741–748, https://doi.org/10.1029/JZ065i002p00741, 1960. 
Short summary
The piston–cylinder apparatus is widely used to investigate rock properties at the conditions of the interior of the Earth, but uncertainty in its calibration of pressure persists, with substantial differences between laboratories. We use a ceramic of magnesium and zinc oxides to measure the conditions experienced by a sample. Routine use of such ceramics provides an archive of experimental conditions, enables interlaboratory comparisons, and resolves long-standing controversies in calibration.