1. Earth, Ocean & Planetary Science Research, School of Natural and Environmental SciencesNewcastle University Newcastle‐upon‐Tyne UK
2. National ESCA and XPS Users’ Service (NEXUS), Newcastle University Newcastle‐upon‐Tyne UK
3. UK Centre for AstrobiologySchool of Physics and Astronomy, University of Edinburgh Edinburgh UK
4. Centre for Materials and Surface ScienceDepartment of Chemistry and PhysicsLa Trobe University Melbourne Victoria Australia
5. Mark Wainwright Analytical CentreUniversity of New South Wales Sydney New South Wales Australia