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Nonmetal, Transitional, Optical properties, P121/c1
K-Nb-S-Ta
Ag-C-Eu-H-O-S
Ag-C-H-O-S-Sm
Br-Cl-Co-H-N-O
Cl-Co-H-N-O
phonons
wavenumber of optical phonon
luminescence
optical absorption
Raman spectra
transitional
nonmetal
chalcogen
non-disordered
quaternary
monoclinic