High mechanical quality factor of calcium fluoride (CaF2) at room temperature Z. Yan, L. Ju, S. Gras, C. Zhao and D. G. Blair Eur. Phys. J. Appl. Phys., 30 3 (2005) 189-192 Published online: 04 March 2005 DOI: 10.1051/epjap:2005015