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Stable high-pressure phases in the H-S system determined by chemically reacting hydrogen and sulfur

Journal Article · · Physical Review B
 [1];  [2];  [3];  [3]
  1. Chinese Academy of Sciences (CAS), Hefei (China); Carnegie Inst. of Washington, Washington, DC (United States)
  2. Carnegie Inst. of Washington, Washington, DC (United States); Russian Academy of Sciences (RAS), Novosibirsk (Russian Federation)
  3. Univ. of Chicago, IL (United States)
+ Show Author Affiliations
Synchrotron x-ray diffraction and Raman spectroscopy have been used to study the chemical reactions of molecular hydrogen (H2) with sulfur (S) at high pressures. We find theoretically predicted Cccm and Im3¯m H3S to be the reaction products at 50 and 140 GPa, respectively. Im3¯m H3S is a stable crystalline phase above 140 GPa and it transforms to R3m H3S on pressure release below 140 GPa. Here, the latter phase is (meta)stable down to at least 70 GPa where it transforms to Cccm H3S upon annealing (T < 1300 K) to overcome the kinetic hindrance. Cccm H3S has an extended structure with symmetric hydrogen bonds at 50 GPa, and upon decompression it experiences a transformation to a molecular mixed H2S – H2 structure below 40 GPa without any apparent change in the crystal symmetry.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
NSF; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357; FG02-94ER14466
OSTI ID:
1353265
Alternate ID(s):
OSTI ID: 1413316
OSTI ID: 1351039
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 14 Vol. 95; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH

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Cited By (18)

Synthesis and Stability of Lanthanum Superhydrides journal December 2017
Synthesis and Stability of Lanthanum Superhydrides journal December 2017
Ab Initio Approach and Its Impact on Superconductivity journal October 2018
Pressure-induced superconducting ternary hydride H3SXe: A theoretical investigation journal August 2018
Possible increased critical temperature Tc in anisotropic bosonic gases journal July 2019
A unique metallic phase of H 3 S at high-pressure: sulfur in three different local environments journal January 2018
Synthesis and stability of hydrogen selenide compounds at high pressure journal November 2017
Structural, electronic, vibrational, and superconducting properties of hydrogenated chlorine journal August 2018
High-temperature superconductivity in alkaline and rare earth polyhydrides at high pressure: A theoretical perspective journal February 2019
Helium-hydrogen immiscibility at high pressures journal March 2019
High-temperature superconductivity using a model of hydrogen bonds journal May 2018
High-temperature superconductivity in ternary clathrate YCaH 12 under high pressures journal April 2019
Archetypical “push the band critical point” mechanism for peaking of the density of states in three-dimensional crystals: Theory and case study of cubic H 3 S journal February 2020
Divergent synthesis routes and superconductivity of ternary hydride MgSiH 6 at high pressure journal October 2017
High-pressure phase diagram of hydrogen and deuterium sulfides from first principles: Structural and vibrational properties including quantum and anharmonic effects journal June 2018
Colloquium : High pressure and road to room temperature superconductivity journal January 2018
Ab Initio Approach and Its Impact on Superconductivity text January 2019
High-pressure phase diagram of hydrogen and deuterium sulfides from first principles: structural and vibrational properties including quantum and anharmonic effects text January 2018

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
X-ray diffraction
general physics
high-temperature superconductors
phase diagrams
pressure effects
pressure techniques
superconducting phase transition