Crystal field analyses for the optical spectra of Mn4+ ion in Y3Al5O12 crystalYang Mei, Wen-Chen Zheng, Ren-Ming Peng and Cheng-Fu WeiEur. Phys. J. Appl. Phys., 69 3 (2015) 30702DOI: https://doi.org/10.1051/epjap/2015140469