Chalcogen, Transitional, Monoclinic, Wavelength for luminescence

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