ISIS Neutron and Muon Source Data Journal

The icy-moon ‘analogue’ of MgSiO3-perovskite: MgSO4.9H2O – a high-pressure study

Abstract: Mg-sulfate 11-hydrate (meridianiite) is decomposed by pressure to form Mg-sulfate 9-hydrate + ice, a process that will occur in the mantles of large icy planetary bodies and have the same impact as olivine's decomposition to Mg-silicate perovskite + MgO in the Earth's mantle.It is necessary for accurate modelling of planetary interiors to determine the high-pressure behaviour of Mg-sulfate 9-hydrate, which includes measurement of its incompressibility (K), as well as the pressure and temperature dependence of K, and characterisation of any phase changes. Some sparse and low-quality data already obtained, combined with DFT calculations, indicate a bulk elastic softening above 1 GPa that may indicate a further phase transition or dehydration. I propose to carry out a gas-cell study on OSIRIS (0-550 MPa, 100-240 K) and a Paris-Edinburgh cell study on PEARL (0-5 GPa, 100-380 K).

Principal Investigator: Dr Dominic Fortes
Local Contact: Professor Felix Fernandez-Alonso

DOI: 10.5286/ISIS.E.RB1620000

ISIS Experiment Number: RB1620000

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Dominic Fortes et al; (2016): The icy-moon ‘analogue’ of MgSiO3-perovskite: MgSO4.9H2O – a high-pressure study, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620000

Data is released under the CC-BY-4.0 license.