Chalcogen, Transitional, Orthorhombic, Photoluminescence spectra

• Ca-Eu-O-Ti
• Ca-O-Pr-Ti
• Al-Mg-Mn-O-Sr
• Eu-Gd-Mo-O
• Ba-Dy-O-Y-Zn
• chalcogen
• transitional
• luminescent
• rare earth
• lanthanoid