Composition determination of off-congruent Li-deficient MgO (5 mol%)-doped LiNbO3 crystals by absorption spectroscopyDe-Long Zhang, Li Qi, Ping-Rang Hua and Edwin Yue-Bun PunEur. Phys. J. Appl. Phys., 57 1 (2012) 10701DOI: https://doi.org/10.1051/epjap/2011110196