Lanthanoid, Transitional, Monoclinic, Wavelength for luminescence

• B-Eu-La-O
• Er-Nb-O-Y-Yb
• Cd-Eu-O-W
• Ba-Dy-Eu-La-O-W
• Eu-Nb-O-Y
• transitional
• lanthanoid
• rare earth
• chalcogen
• luminescent