ISIS Neutron and Muon Source Data Journal

Understanding Deep Earth Mineralogy: A High P/T study of CaSiO3 Perovskite

Abstract: CaSiO3 perovskite is the third most abundant mineral in the Earth's lower mantle; it also occurs as a major phase at lower pressures and temperatures in subduction zones, where, for example, it may form ~25 wt% of subducted mid-ocean ridge basalt. Its crystal structure, ferroelastic phase transitions, elastic properties and equation of state are, therefore, of great significance for the interpretation of seismological data. The phase diagram of CaSiO3 perovskite is currently in a state of utter confusion, with computer simulations and experimental studies disagreeing widely as to the structures of CaSiO3 and the P/T conditions under which they occur. Recent work at the ESRF has shown that the introduction of 0.5–1.0 wt% of H2O stabilises a non-cubic phase to lower P & T. We propose to use PEARL to make an accurate structure determination H2O-doped CaSiO3 perovskite at 1250 K and 10 GPa.

Principal Investigator: Professor Ian Wood
Local Contact: Dr Craig Bull
Experimenter: Dr Andrew Thomson
Experimenter: Professor David Dobson

DOI: 10.5286/ISIS.E.RB1610162

ISIS Experiment Number: RB1610162

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:
Professor Ian Wood et al; (2016): Understanding Deep Earth Mineralogy: A High P/T study of CaSiO3 Perovskite, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610162

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