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Singularities of spectra of infrared reflection of tertiary compounds of the type T1BX2

Hasanlı, Nızamı
Khalafov, Z.D.
Khomutova, M.D.
Sardarly, R.M.
Tagorov, V.I.
The frequencies of lattice vibrations are calculated for compounds of the type T1BX2 on the basis of the linear-chain model. The calculated frequencies are compared with experimental values for TlGaS2 and TlGaSe2. The good agreement between the calculated and experimental frequencies serves as proof of the applicability of the linear-chain model to compounds of the T1BX2 type. The proposed method of calculation of frequencies makes it possible to predict the theoretical frequencies of lattice vibrations of ternary compounds that have a chain structure.