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Journal Article PUBDB-2024-01494
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Diamond precipitation dynamics from hydrocarbons at icy planet interior conditions

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2024
Nature Publishing Group London

Nature astronomy 8(2), 174-181 () [10.1038/s41550-023-02147-x]
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Abstract: The pressure and temperature conditions at which precipitation of diamond occurs from hydrocarbon mixtures is important for modelling the interior dynamics of icy planets. However, there is substantial disagreement from laboratory experiments, with those using dynamic compression techniques finding much more extreme conditions are required than in static compression. Here we report the time-resolved observation of diamond formation from statically compressed polystyrene, (C$_8$H$_8$)$_n$, heated using the 4.5 MHz X-ray pulse trains at the European X-ray Free Electron Laser facility. Diamond formation is observed above 2,500 K from 19 GPa to 27 GPa, conditions representative of Uranus’s and Neptune’s shallow interiors, on 30 μs to 40 μs timescales. This is much slower than may be observed during the ∼10 ns duration of typical dynamic compression experiments, revealing reaction kinetics to be the reason for the discrepancy. Reduced pressure and temperature conditions for diamond formation has implications for icy planetary interiors, where diamond subduction leads to heating and could drive convection in the conductive ice layer that has a role in their magnetic fields.

Classification:
Contributing Institute(s):
  1. DOOR-User (DOOR ; HAS-User)
  2. FS-PS Fachgruppe HIBEF (FS-HIBEF)
  3. HED (XFEL_E1_HED)
  4. FS-DS (CFEL-DRD)
  5. Detector Operations (XFEL_DO_DD_DET)
Research Program(s):
  1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
  2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
Experiment(s):
  1. PETRA Beamline P02.2 (PETRA III)

Appears in the scientific report 2024
Database coverage:
Medline ; Embargoed OpenAccess ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Nature ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
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Private Collections > >Extern > >HAS-User > HAS-User
Private Collections > >DESY > >FS > FS-HIBEF
Private Collections > >XFEL.EU > XFEL_DO_DD_DET
Private Collections > >XFEL.EU > XFEL_E1_HED
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Publisher Correction: Diamond precipitation dynamics from hydrocarbons at icy planet interior conditions
Nature astronomy 8(4), 545 () [10.1038/s41550-024-02205-y]  GO  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

 Record created 2024-04-16, last modified 2025-07-15
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Published on 2024-01-08. Available in OpenAccess from 2024-07-08.:
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