High pressure behaviour of ammonium carbonate monohydrate

DOI

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 protonated single crystals of ammonium carbonate monohydrate using a TiZr gas cell on SXD, which we hope will confirm our DFT calculations and reveal the existence of any high-pressure polymorphs.

Identifier
DOI https://doi.org/10.5286/ISIS.E.73942358
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/73942358
Provenance
Creator Dr Dominic Fortes; Professor Ian Wood; Dr Matthias Gutmann; Dr Christopher Howard
Publisher ISIS Neutron and Muon Source
Publication Year 2019
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2016-02-25T10:00:00Z
Temporal Coverage End 2016-03-02T10:00:00Z