Lanthanoid, Transitional, Trigonal, Wavelength for luminescence

• Eu-La-O-P-Pb-Si-Zr
• Ca-Eu-O-V
• Eu-F-La
• Eu-Ga-Ge-La-O-Tb
• Al-B-Eu-O-Y
• lanthanoid
• transitional
• rare earth
• chalcogen
• luminescent