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Open AccessArticle

The Bridgmanite–Akimotoite–Majorite Triple Point Determined in Large Volume Press and Laser-Heated Diamond Anvil Cell

1
School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA
2
Eyring Materials Center, Arizona State University, Tempe, AZ 85287, USA
3
GeoSoilEnviroCars, University of Chicago, Chicago, IL 60439, USA
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(1), 67; https://doi.org/10.3390/min10010067
Received: 11 December 2019 / Revised: 7 January 2020 / Accepted: 9 January 2020 / Published: 15 January 2020
(This article belongs to the Special Issue Mineral Physics—In Memory of Orson Anderson)
The bridgmanite–akimotoite–majorite (Bm–Ak–Mj or BAM) triple point in MgSiO3 has been measured in large-volume press (LVP; COMPRES 8/3 assembly) and laser-heated diamond anvil cell (LHDAC). For the LVP data, we calculated pressures from the calibration provided for the assembly. For the LHDAC data, we conducted in situ determination of pressure at high temperature using the Pt scale at synchrotron. The measured temperatures of the triple point are in good agreement between LVP and LHDAC at 1990–2000 K. However, the pressure for the triple point determined from the LVP is 3.9 ± 0.6 GPa lower than that from the LHDAC dataset. The BAM triple point determined through these experiments will provide an important reference point in the pressure–temperature space for future high-pressure experiments and will allow mineral physicists to compare the pressure–temperature conditions measured in these two different experimental methods. View Full-Text
Keywords: triple point; bridgmanite; akimotoite; majorite; large-volume press; laser-heated diamond anvil cell triple point; bridgmanite; akimotoite; majorite; large-volume press; laser-heated diamond anvil cell
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Kulka, B.L.; Dolinschi, J.D.; Leinenweber, K.D.; Prakapenka, V.B.; Shim, S.-H. The Bridgmanite–Akimotoite–Majorite Triple Point Determined in Large Volume Press and Laser-Heated Diamond Anvil Cell. Minerals 2020, 10, 67.

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