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2008, Chalcogen, Rare earth, Optical properties
Er-K-Nb-O-Ta
Al-B-O-Yb
Fe-La-O-Sr
As-Ce-Fe-O
B-Eu-Gd-O-Y
phonons
luminescence
wavenumber of optical phonon
optical absorption
optical spectra
chalcogen
rare earth
lanthanoid
transitional
nonmetal
cubic
trigonal
tetragonal
monoclinic
orthorhombic