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Monoclinic, Nonmetal, Phonons
In-S-Tl
O-Sr-V
Cs-H-O-S
Ga-S-Tl
K-Nb-S-Ta
wavenumber of optical phonon
Raman spectra
vibrational spectra
wavenumber of longitudinal optical phonon
infrared spectra
nonmetal
chalcogen
non-disordered
transitional
quaternary