Orthorhombic, Photoluminescence spectra, Rare earth, Transitional

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