1. Department of Materials Science and Engineering, University of Arizona, Tucson, Arizona 85721, USA
2. Division of Materials Science, University of California, Davis, California 95616, USA
3. Umicore IR Glass, ZA du Boulais, Acigne 35960, France
4. Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226, F-35000 Rennes, France