ISIS Neutron and Muon Source Data Journal

High pressure behaviour of ammonium carbamate

Abstract: A number of compounds crystallise in the NH3-H2O-CO2 ternary system, including ammonium carbonates and carbamates, these being closely related to the water-deficient compound urea. NH3, H2O and CO2 are abundant in interstellar and planetary ices so we expect carbonates and carbamates to occur in the interiors of icy planetary bodies.Our objective is to obtain high-pressure information on the structure and properties of ternary NH3-H2O-H2O compounds to provide the basis of accurate planetary interior models. The proposed experiment complements recent ab initio calculations that show extreme elastic anisotropy (specifically, negative linear compressibility).Here we propose to compress deuterated ammonium carbamate to order 10 GPa using the Paris-Edinburgh press on PEARL, which we hope will confirm our DFT calculations and reveal the existence of any high-pressure polymorphs.

Principal Investigator: Dr Dominic Fortes
Local Contact: Dr Craig Bull
Experimenter: Professor Ian Wood
Experimenter: Dr Weiwei Wang
Experimenter: Dr Christopher Howard
Local Contact: Mr Frazer Barnsley
Experimenter: Mr Jeremy Spencer
Experimenter: Mr Kyle Pidgeon

DOI: 10.5286/ISIS.E.RB1610093

ISIS Experiment Number: RB1610093

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): High pressure behaviour of ammonium carbamate, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610093

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