FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiation
Fourier-transform infrared (FT-IR) reflection spectra, asquired at nearnormal incidence, were recorded from single crystals belonging to six crystal systems: CsCr(SO4)2.12H2O (alum, cubic), K2CuCl2·2H2O (Mitscherlichite, tetragonal), CaCO3 (calcite, hexagonal), KHSO4 (mercallite, orthorhombic), CaSO...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2000-07-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/HtDocs/SHD/Vol65/No7-Pdf/Jscs7-08.zip |
| _version_ | 1818001752720408576 |
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| author | METODIJA NAJDOSKI VLADIMIR IVANOVSKI VLADIMIR M. PETRUSEVSKI |
| author_facet | METODIJA NAJDOSKI VLADIMIR IVANOVSKI VLADIMIR M. PETRUSEVSKI |
| author_sort | METODIJA NAJDOSKI |
| collection | DOAJ |
| description | Fourier-transform infrared (FT-IR) reflection spectra, asquired at nearnormal incidence, were recorded from single crystals belonging to six crystal systems: CsCr(SO4)2.12H2O (alum, cubic), K2CuCl2·2H2O (Mitscherlichite, tetragonal), CaCO3 (calcite, hexagonal), KHSO4 (mercallite, orthorhombic), CaSO4·2H2O (gypsum, monoclinic) and CuSO4·5H2O (chalcantite, triclinic). The acquired IR reflection spectra were further transformed into absorption spectra, employing the Kramers-Kronig transformation. Except for the cubic alums, the spectra strongly depend on the crystal face from which they were recorded; this is a consequence of anisotropy. Phonons of a given symmetry (E-species, in tetragonal/hexagonal and B-species, in monoclinic crystals) may be resolved without using a polariser. The spectrum may be simplified in the case of an orthorhombic crystal, as well. The longitudinal-optical (LO) and transversal-optical (TO) mode frequencies were calculated in the case of optically isotropic and the simplified spectra of optically uniaxial crystals. |
| first_indexed | 2024-04-14T03:38:23Z |
| format | Article |
| id | doaj.art-1f59e36ba7e54ce28479a86ef8b229c3 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-04-14T03:38:23Z |
| publishDate | 2000-07-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-1f59e36ba7e54ce28479a86ef8b229c32022-12-22T02:14:39ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392000-07-01657529536FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiationMETODIJA NAJDOSKIVLADIMIR IVANOVSKIVLADIMIR M. PETRUSEVSKIFourier-transform infrared (FT-IR) reflection spectra, asquired at nearnormal incidence, were recorded from single crystals belonging to six crystal systems: CsCr(SO4)2.12H2O (alum, cubic), K2CuCl2·2H2O (Mitscherlichite, tetragonal), CaCO3 (calcite, hexagonal), KHSO4 (mercallite, orthorhombic), CaSO4·2H2O (gypsum, monoclinic) and CuSO4·5H2O (chalcantite, triclinic). The acquired IR reflection spectra were further transformed into absorption spectra, employing the Kramers-Kronig transformation. Except for the cubic alums, the spectra strongly depend on the crystal face from which they were recorded; this is a consequence of anisotropy. Phonons of a given symmetry (E-species, in tetragonal/hexagonal and B-species, in monoclinic crystals) may be resolved without using a polariser. The spectrum may be simplified in the case of an orthorhombic crystal, as well. The longitudinal-optical (LO) and transversal-optical (TO) mode frequencies were calculated in the case of optically isotropic and the simplified spectra of optically uniaxial crystals.http://www.shd.org.yu/HtDocs/SHD/Vol65/No7-Pdf/Jscs7-08.zipreflection spectraanisotropyKramers-Kronig transformationphononssymmetry resolvingLO phononsTO phonons |
| spellingShingle | METODIJA NAJDOSKI VLADIMIR IVANOVSKI VLADIMIR M. PETRUSEVSKI FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiation Journal of the Serbian Chemical Society reflection spectra anisotropy Kramers-Kronig transformation phonons symmetry resolving LO phonons TO phonons |
| title | FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiation |
| title_full | FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiation |
| title_fullStr | FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiation |
| title_full_unstemmed | FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiation |
| title_short | FT-IR reflection spectra of single crystals: resolving phonons of different symmetry without using polarised radiation |
| title_sort | ft ir reflection spectra of single crystals resolving phonons of different symmetry without using polarised radiation |
| topic | reflection spectra anisotropy Kramers-Kronig transformation phonons symmetry resolving LO phonons TO phonons |
| url | http://www.shd.org.yu/HtDocs/SHD/Vol65/No7-Pdf/Jscs7-08.zip |
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