Vibronic Transitions and Site Substitution of Eu2+ and Codoped Ions in KMgF3:Eu-X (X=Ce, Cr, Gd, Cu) System
SU Hai-Quan, JIA Zhi-Hong, SHI Chun-Shan
Chem. J. Chinese Universities . 2001, (10): 1620 -1624 .