Details

Autor(en) / Beteiligte

• Syrbu, N. N.
• Krasovsky, V. T.
• Grincheshen, I. N.

Titel

Optical Phonons and Chemical Bonding in TlSbS 2 , TlSbSe 2 , and Tl 3 SbS 3 Crystals

Ist Teil von

• Crystal research and technology (1979), 1993-01, Vol.28 (3), p.371-380

Erscheinungsjahr

1993

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Abstract The optical phonons at k = 0 of TlSbS 2 , TlSbSe 2 , and Tl 3 SbS 3 have been investigated by infrared reflectivity measurements from 50 to 4000 cm −1 at 300 K. The factor group analysis of vibrational modes of TlSbS 2 and Tl 3 SbS 3 crystal lattices has been made. The dielectric constant dispersion for E ‖ a and E ‖ b has been determined by classical dispersion relations. The Szigeti effective charges, the Born dynamic effective charge, and the Tl, Sb, S (Se) relative ion charges were calculated in dependence on the polarization of the incident light. [Russian Text Ignored].