Zobrazeno 1 - 10 of 41 pro vyhledávání: '"L. Benarafa"'
1
Etude théorique et expérimentale des spectres de vibration des phosphates K3Ln(PO4)2
Autor: A. Lorriaux, L. Rghioui, F. Wallart, L. Benarafa, M. Knidiri, M. Saidi Idrissi, R. Nejjar
Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-...]
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], Elsevier, 2005, 61, pp.419. ⟨10.1016/j.saa.2004.03.042⟩
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], 2005, 61, pp.419. ⟨10.1016/j.saa.2004.03.042⟩
The monoclinic phosphates with K3Ln(PO4)2 (Ln=rare earth) formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for K3Nd(PO4)2 are presented.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42a9a68acbd2cc8bd251e9f9f1f041de
https://doi.org/10.1016/j.saa.2004.03.042
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2
Spectres de vibration des diphosphates monocliniques de formule AMP2O7
Autor: L. Benarafa, M Serghini Idrissi, R. Nejjar, L. Rghioui, F. Wallart, A. Lorriaux, M. Saidi Idrissi
Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 60:2043-2052
The monoclinic pyrophosphates with AMP2O7 formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for CaCuP2O7 are presented.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d44570a1b7c61ee2d8465b6172ed1383
https://doi.org/10.1016/j.saa.2003.11.002
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3
Caractérisation et approche structurale de verres du systeme La2O3–MgO–B2O3
Autor: G. Le Flem, M. Lafjij, Alain Lautié, L. Benarafa, N. El Jouhari
Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-...]
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], Elsevier, 2003, 59 (7), pp.1643-1653. ⟨10.1016/S1386-1425(02)00391-8⟩
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], 2003, 59 (7), pp.1643-1653. ⟨10.1016/S1386-1425(02)00391-8⟩
International audience; In this paper, a vitreous domain of the ternary system: xLa2O3–yMgO–zB2O3 characterised by X-ray diffraction is shown. Structural approach using vibrational spectroscopy and optical probe is realized for some of these glas
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c794a4e32b342ac138d5dc9c68d99f5d
https://doi.org/10.1016/s1386-1425(02)00391-8
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4
Etude vibrationnelle des monophosphates SrM2(PO4)2 avec M=Co, Ni
Autor: R. Nejjar, L. Benarafa, A. Lorriaux, F. Wallart, L. Rghioui, M. Knidiri
Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 58:2951-2960
Resume Ce travail porte sur l’etude experimentale et theorique des spectres de vibration des phosphates SrM 2 (PO 4 ) 2 avec M=Ni, Co synthetises par nous meme. Une attribution des raies et des bandes de vibration a ete proposee et confirmee par un
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9755d001f955a2d0adb864ea05836bf4
https://doi.org/10.1016/s1386-1425(02)00039-2
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5
Structure cristalline de la 4-méthyl-1,2,4-triazole-thione
Autor: M. Saidi Idrissi, G. Mattern, L. Benarafa, A. El Hajji, L. El Ammari
Publikováno v: Journal de Chimie Physique et de Physico-Chimie Biologique. 95:2103-2108
La 4-methyl-1,2,4-triazole-thione cristallise dans un systeme monoclinique avec un groupe d'espace P21/n. Les parametres cristallins sont : a = 7,946 A ; b = 6,295 A ; c = 20,901 A ; β=100,47○ et Z = 8. L'affinement de la structure a conduit aux f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a2393a26e2c36cdc254f99a1ceaf94c2
https://doi.org/10.1051/jcp:1998357
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6
Apport de la spectroscopie de vibration à l'approche structurale des composés de type K2RbLn(PO4)2(Ln est lanthanide)
Autor: M. Saidi Idrissi, L. Benarafa, A. Lorriaux, L. Rghioui, F. Wallart
Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 52:419-427
Resume La synthese des composes de type K 2 RbLn(PO 4 ) 2 (Ln est Ce, …, Lu) a ete realisee par voie seche. L'analyse des diagrammes de poudre et des spectres de vibration de cette famille nous a amene d'une part a considerer deux types de symetrie
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c6f1eed5a5624f98fc0b971a29d9f85
https://doi.org/10.1016/0584-8539(95)01575-2
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8
ChemInform Abstract: K2CsYb(PO4)2
Autor: Jean Pierre Wignacourt, L. Rghioui, L. Benarafa, Lahcen El Ammari
Publikováno v: ChemInform. 33
The crystal structure of dipotassium caesium ytterbium bis(phosphate) is built up from regular independent PO4 tetrahedra and YbO6 octahedra sharing corners and arranged in layers. The structure is, in many respects, similar to that of glaserite.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16e0e188d04f694661a981f38e72c3e6
https://doi.org/10.1002/chin.200240007
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9
Polymorphism in 4-methyl-1,2,4-triazolethione
Autor: L. Benarafa, M. Saidi Idrissi, Alain Lautié, A. Elhajji, S. Zaydoun, François Romain
Publikováno v: Journal of Raman Spectroscopy. 31:951-953
Raman and infrared spectra of 4-methyl-1,2,4-triazolethione showed that two crystalline phases, one stable and the other metastable, can be obtained from various crystallization processes. The metastable phase transforms into the stable phase at 395
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fbc08bcf0c4148e08c3b9f8b550450f2
https://doi.org/10.1002/1097-4555(200010)31:10<951::aid-jrs635>3.0.co
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10
[Theoretical and experimental vibrational spectroscopy study of K3Ln(PO4)2 phosphates]
Autor: L, Benarafa, L, Rghioui, R, Nejjar, M, Saidi Idrissi, M, Knidiri, A, Lorriaux, F, Wallart
Publikováno v: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 61(3)
The monoclinic phosphates with K3Ln(PO4)2 (Ln=rare earth) formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for K3Nd(PO4)2 are presented.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::d7f52b548a708d459157c47d9a2f38c1
https://pubmed.ncbi.nlm.nih.gov/15582809
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