Infrared spectra of the natural zeolite heulandite

1985 ◽  
Vol 50 (10) ◽  
pp. 2134-2138 ◽  
Author(s):  
František Pechar
Keyword(s):  
Absorption Spectra ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Natural Zeolite ◽  
Room Temperature ◽  
Far Infrared ◽  
Reflection Spectra ◽  
Mid Infrared

The mid-infrared (4 000-200 cm-1) absorption spectra, far infrared (400-40 cm-1) absorption spectra, infrared (1 400-200 cm-1) reflection spectra, and Raman spectra (3 600-50 cm-1) were measured at room temperature for polycrystalline heulandite, a natural zeolite from Poonah, India.

scholarly journals Symmetrical Analysis Phonon Modes of Crystal -Ag8SnSe6

2015 ◽  
Vol 16 (2) ◽  
pp. 257-260
Author(s):  
І.V. Semkiv ◽  
А.І. Kashuba ◽  
H.A. Ilchuk ◽  
M.V. Chekaylo
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Group Symmetry ◽  
Phonon Modes ◽  
Orthorhombic System ◽  
Space Group Symmetry ◽  
Space Group ◽  
Phonon Spectra

Symmetrical analysis of the phonon spectra of  lowtemperature b¢-phase of crystal Ag8SnSe6 carried out. At the room temperature argyrodite Ag8SnSe6 belong to orthorhombic system with space group symmetry Pmn21. Classification of the main phonon modes of crystal carried out. Clarified selection rules for Raman spectra and infrared spectra.

Luminescence Spectra of Trans-Bis(N-Alkyliminodiacetato)- Chromate(III) Complexes

1979 ◽  
Vol 34 (9) ◽  
pp. 1099-1105
Author(s):  
Rainer Wernicke ◽  
Hans-Herbert Schmidtke ◽  
Patrick E. Hoggard
Keyword(s):  
Infrared Spectra ◽  
Room Temperature ◽  
Far Infrared ◽  
Vibronic Spectrum ◽  
Tetragonal Symmetry ◽  
Luminescence Spectra ◽  
Intensity Maximum ◽  
Zero Phonon Line ◽  
Phonon Line ◽  
Far Infrared Spectra

Abstract Luminescence spectra at 85 K have been recorded for a series of chromium (III) complexes with alkyliminodiacetates (RIDA) of the form K[Cr(RIDA)2], R=M(methyl), E(ethyl), n-P(n-propyl), i-P(isopropyl), n-B-(n-butyl), and t-B (t-butyl). Infrared and far infrared spectra of room temperature samples were also recorded. All of the RIDA complexes exhibited the vibronic spectrum, with a remarkable shift of the intensity maximum away from the zero phonon line, which is characteristic of trans geometry in these complexes pointing to a 2E (tetragonal symmetry label) luminescent state. A comparison of vibronic intervals with IR data suggests several bands which may be indicative of iminodiacetate coordination.

The Preparation and Low-Frequency Vibrational Spectra of Some Copper(I) and Silver(I) Alkane- and Arene-monothiolate Complexes

1979 ◽  
Vol 32 (7) ◽  
pp. 1443 ◽  
Author(s):  
GA Bowmaker ◽  
L Tan
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Far Infrared ◽  
New Methods ◽  
Thiolate Complexes ◽  
New Compounds ◽  
First Time ◽  
Far Infrared Spectra

A number of different methods for preparing anionic Group 1B metal thiolate complexes have been investigated. The compounds [Me4N] [CU2(SMe)3] and [Et4N] [Ag5(SBut)6] are reported for the first time, and new methods for preparing the previously known compounds [Et4N] [Cu5(SBut)6], [Me4N]2 [CU5(SPh)7] and [Et4N]2 [Cu5(SPh)7] are described. The far-infrared spectra of the above compounds, and of CuSMe, CuSBut, AgSBut, [Me4N]2 [CU4(SPh)6] and [Me4N]2 [Ag5(SPh)7] have been obtained, and metal-sulfur stretching bands are assigned in the 150-350 cm-1 region. The low-frequency Raman spectra have also been obtained for some of these compounds. Possible structures for the new compounds are considered in the light of the low-frequency vibrational spectra.

Far-infrared and Raman Spectra of Crystalline ICN

1971 ◽  
Vol 49 (14) ◽  
pp. 2459-2462 ◽  
Author(s):  
R. Savoie ◽  
M. Pézolet
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
High Frequency ◽  
Far Infrared ◽  
Infrared And Raman Spectra ◽  
Infrared Band ◽  
Longitudinal Modes ◽  
Intensity Measurements ◽  
Cyanogen Iodide ◽  
Far Infrared Spectra

The Raman and far-infrared spectra of crystalline cyanogen iodide have been recorded. High-frequency shoulders alongside the Raman bands confirm the piezoelectric nature of this solid and allow an estimate to be made of the frequencies of the longitudinal modes associated to the fundamental vibrations. Dipole derivatives calculated from these frequencies agree qualitatively with those obtained from infrared band intensity measurements.

Far infrared and Raman spectra of some crystalline halomercurate(II) complexes

1966 ◽  
Vol 19 (9) ◽  
pp. 1603 ◽  
Author(s):  
GB Deacon ◽  
JHS Green ◽  
W Kynaston
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Far Infrared ◽  
Vibrational Frequencies ◽  
Infrared And Raman Spectra

The infrared spectra (500-40 cm-1) of crystalline (Me4N)2HgCl4, Me4NHgCl3, and (Et4As)2HgI4, and the Raman spectra of the first two compounds, have been recorded. Assignments of the vibrational frequencies are made and discussed in relation to the structure of the anions.

Infrared and Dielectrical Properties of SrTiO3:Nd

2006 ◽  
Vol 518 ◽  
pp. 471-476 ◽  
Author(s):  
Slavica Spasović ◽  
N. Paunović ◽  
D. Popović ◽  
Jablan Dojčilović
Keyword(s):  
Single Crystal ◽  
Room Temperature ◽  
Phonon Mode ◽  
Far Infrared ◽  
Reflection Spectra ◽  
Dielectric Measurements ◽  
Pure Crystal ◽  
Fitting Procedure ◽  
Infrared Reflection ◽  
Dielectrical Properties

Far-infrared reflection spectra and results of dielectric measurements of SrTiO3 single crystal doped by neodymium are presented in the paper. Dielectric investigations were conducted at temperature range from 25 K to room temperature for the test frequency 1MHz. The numerical analysis of the far-infrared reflection spectra made using a fitting procedure based on factorized form of the dielectric function. The results for SrTiO3: Nd are compared with those for pure crystal. The lowest-frequency phonon mode is found to be strongly influenced by presence of neodymium ions in SrTiO3 single crystal.

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