Original scientific paper
Consideration of the vibrational properties of germanium dichalcogenides on base of vibrational properties of Ge X4 (X = S, Se) tetrahedra
Zoran V. Popović
; Institute of Physics, Belgrade University, P. 0. B. 57, 11001 Beograd, Yugoslavia
Abstract
Vibrational properties of the single crystals GeS2 and GeSe2 have been analysed on ground of their properties of the crystal structure (the basic building blocks in GeX2 are GeX4 tetrahedra, which are interconnected via common edge or a common corner). There have been analysed the Raman and infrared spectra of an isolated GeS4 tetrahedra, of single crystals SnGeS3 and PbGeS3, (whose GeS4 tetrahedra are connected via common corners), then the Raman spectra of a Ge2S6 molecule, (built of two GeS4 tetrahedra connected via common edge) and the Raman and infrared spectra of a - of and c - GeX2. It has been concluded that molecular vibrations of the variously connected GeX4 tetrahedra are not only present in the single crystals GeS2 and GeSe2, too, but they also play a dominant role in vibrational properties of the germanium dichalcogenides.
Keywords
Hrčak ID:
328426
URI
Publication date:
3.1.1983.
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