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High-pressure melting curve of sulfur up to 65 GPa

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [3];  [4]
  1. Yale Univ., New Haven, CT (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. American School of Dubai, Dubai (United Arab Emirates)
  4. Yale Univ., New Haven, CT (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The melting curve of elemental sulfur was measured to pressures of 65 GPa in a laser-heated diamond-anvil cell using ex situ textural analyses combined with spectroradiometry and benchmarked with laser-power-temperature functions. Here, the melting curve reaches temperatures of ~ 1800 K by 65 GPa and is smooth in the range of 23–65 GPa with a Clapeyron slope of ~ 14 K / GPa at 23 GPa. This is consistent with melting of a single tetragonal sulfur structure in this range, which is confirmed by in situ x-ray diffraction. An updated equation of state for tetragonal sulfur is determined, and the high-pressure, high-temperature stability region of tetragonal sulfur is reassessed.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Aeronautic and Space Administration (NASA); National Science Foundation (NSF); Carnegie/DOE Alliance Center (CDAC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1562279
Alternate ID(s):
OSTI ID: 1557390
OSTI ID: 1579613
OSTI ID: 1581182
OSTI ID: 1689688
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 5 Vol. 100; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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