High-pressure melt curve and phase diagram of lithium

Mungo Frost; Jongjin B. Kim; Emma E. McBride; J. Ryan Peterson; Jesse S. Smith; Peihao Sun; Siegfried H. Glenzer

doi:10.1103/physrevlett.123.065701

High-pressure melt curve and phase diagram of lithium

Mungo Frost, Jongjin B. Kim, Emma E. McBride, J. Ryan Peterson, Jesse S. Smith, Peihao Sun, Siegfried H. Glenzer

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

We investigate the phase diagram of lithium at temperatures of 200 to 400 K, to pressures over 100 GPa using x-ray diffraction in diamond anvil cells, covering the region in which the melting curve is disputed. To overcome degradation of the diamond anvils by dense lithium we utilize a rapid compression scheme taking advantage of the high flux available at modern synchrotrons. Our results show the hR1 and cI16 phases to be stable to higher temperature than previously reported. The melting minima of lithium is found to be close to room temperature between 40 and 60 GPa, below which the solid is crystalline. Analysis of the stability fields of the cI16 and oC88 phases suggest the existence of a triple point between these and an undetermined solid phase at 60 GPa between 220 and 255 K.

Original language	English
Article number	065701
Journal	Physical Review Letters
Volume	123
Issue number	6
DOIs	https://doi.org/10.1103/physrevlett.123.065701
Publication status	Published - 05 Aug 2019
Externally published	Yes

Bibliographical note

Funding Information:
The authors would like that thank Curtis Kenney-Benson and Rich Ferry for assistance with low temperature measurements and Grace Tang for assistance with loading lithium. This work was supported by the U.S. Department of Energy (DOE) Office of Fusion Energy Sciences funding No.FWP100182. Equipment support from Stanford Synchrotron Radiation Light source (SSRL) is acknowledged under DOE Office of Basic Energy Sciences under Contract No.DE-AC02-76SF00515. Powder XRD was performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSAs Office of Experimental Sciences. The Advanced Photon Source is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No.DE-AC02-06CH11357.

Funding Information:
The authors would like that thank Curtis Kenney-Benson and Rich Ferry for assistance with low temperature measurements and Grace Tang for assistance with loading lithium. This work was supported by the U.S. Department of Energy (DOE) Office of Fusion Energy Sciences funding No. FWP100182. Equipment support from Stanford Synchrotron Radiation Light source (SSRL) is acknowledged under DOE Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. Powder XRD was performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA’s Office of Experimental Sciences. The Advanced Photon Source is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.

Publisher Copyright:
© 2019 American Physical Society.

ASJC Scopus subject areas

General Physics and Astronomy

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Cite this

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title = "High-pressure melt curve and phase diagram of lithium",

abstract = "We investigate the phase diagram of lithium at temperatures of 200 to 400 K, to pressures over 100 GPa using x-ray diffraction in diamond anvil cells, covering the region in which the melting curve is disputed. To overcome degradation of the diamond anvils by dense lithium we utilize a rapid compression scheme taking advantage of the high flux available at modern synchrotrons. Our results show the hR1 and cI16 phases to be stable to higher temperature than previously reported. The melting minima of lithium is found to be close to room temperature between 40 and 60 GPa, below which the solid is crystalline. Analysis of the stability fields of the cI16 and oC88 phases suggest the existence of a triple point between these and an undetermined solid phase at 60 GPa between 220 and 255 K.",

author = "Mungo Frost and Kim, {Jongjin B.} and McBride, {Emma E.} and Peterson, {J. Ryan} and Smith, {Jesse S.} and Peihao Sun and Glenzer, {Siegfried H.}",

note = "Funding Information: The authors would like that thank Curtis Kenney-Benson and Rich Ferry for assistance with low temperature measurements and Grace Tang for assistance with loading lithium. This work was supported by the U.S. Department of Energy (DOE) Office of Fusion Energy Sciences funding No.FWP100182. Equipment support from Stanford Synchrotron Radiation Light source (SSRL) is acknowledged under DOE Office of Basic Energy Sciences under Contract No.DE-AC02-76SF00515. Powder XRD was performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSAs Office of Experimental Sciences. The Advanced Photon Source is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No.DE-AC02-06CH11357. Funding Information: The authors would like that thank Curtis Kenney-Benson and Rich Ferry for assistance with low temperature measurements and Grace Tang for assistance with loading lithium. This work was supported by the U.S. Department of Energy (DOE) Office of Fusion Energy Sciences funding No. FWP100182. Equipment support from Stanford Synchrotron Radiation Light source (SSRL) is acknowledged under DOE Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. Powder XRD was performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA{\textquoteright}s Office of Experimental Sciences. The Advanced Photon Source is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

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AU - Sun, Peihao

AU - Glenzer, Siegfried H.

N1 - Funding Information: The authors would like that thank Curtis Kenney-Benson and Rich Ferry for assistance with low temperature measurements and Grace Tang for assistance with loading lithium. This work was supported by the U.S. Department of Energy (DOE) Office of Fusion Energy Sciences funding No.FWP100182. Equipment support from Stanford Synchrotron Radiation Light source (SSRL) is acknowledged under DOE Office of Basic Energy Sciences under Contract No.DE-AC02-76SF00515. Powder XRD was performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSAs Office of Experimental Sciences. The Advanced Photon Source is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No.DE-AC02-06CH11357. Funding Information: The authors would like that thank Curtis Kenney-Benson and Rich Ferry for assistance with low temperature measurements and Grace Tang for assistance with loading lithium. This work was supported by the U.S. Department of Energy (DOE) Office of Fusion Energy Sciences funding No. FWP100182. Equipment support from Stanford Synchrotron Radiation Light source (SSRL) is acknowledged under DOE Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. Powder XRD was performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA’s Office of Experimental Sciences. The Advanced Photon Source is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Publisher Copyright: © 2019 American Physical Society.

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N2 - We investigate the phase diagram of lithium at temperatures of 200 to 400 K, to pressures over 100 GPa using x-ray diffraction in diamond anvil cells, covering the region in which the melting curve is disputed. To overcome degradation of the diamond anvils by dense lithium we utilize a rapid compression scheme taking advantage of the high flux available at modern synchrotrons. Our results show the hR1 and cI16 phases to be stable to higher temperature than previously reported. The melting minima of lithium is found to be close to room temperature between 40 and 60 GPa, below which the solid is crystalline. Analysis of the stability fields of the cI16 and oC88 phases suggest the existence of a triple point between these and an undetermined solid phase at 60 GPa between 220 and 255 K.

AB - We investigate the phase diagram of lithium at temperatures of 200 to 400 K, to pressures over 100 GPa using x-ray diffraction in diamond anvil cells, covering the region in which the melting curve is disputed. To overcome degradation of the diamond anvils by dense lithium we utilize a rapid compression scheme taking advantage of the high flux available at modern synchrotrons. Our results show the hR1 and cI16 phases to be stable to higher temperature than previously reported. The melting minima of lithium is found to be close to room temperature between 40 and 60 GPa, below which the solid is crystalline. Analysis of the stability fields of the cI16 and oC88 phases suggest the existence of a triple point between these and an undetermined solid phase at 60 GPa between 220 and 255 K.

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DO - 10.1103/physrevlett.123.065701

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JO - Physical Review Letters

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ER -

High-pressure melt curve and phase diagram of lithium

Abstract

Bibliographical note

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