Lanthanoid, Transitional, Orthorhombic, Photoluminescence spectra

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