Wüstite: electric, thermodynamic and optical properties of FeO F. Schrettle, Ch. Kant, P. Lunkenheimer, F. Mayr, J. Deisenhofer and A. Loidl Eur. Phys. J. B, 85 5 (2012) 164 Published online: 24 May 2012 DOI: 10.1140/epjb/e2012-30201-5