1. Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
2. Cavendish
Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
3. Gonville and Caius College, Trinity
Street, Cambridge CB2 1TA, U.K.
4. Diamond Light Source Ltd., Harwell
Science and Innovation Campus, Didcot OX11 0DE, U.K.
5. X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
6. Department
of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, U.K.
7. Advanced
Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
8. Department
of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, U.K.