Orthorhombic, Photoluminescence spectra, Transitional

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