scispace - formally typeset
Search or ask a question

Showing papers by "Enrique J. Baran published in 1975"


Journal ArticleDOI
TL;DR: In this article, eine einfache correlation zwischen der Zersetzungstemperatur und der Lage des Liganden L in der spektrochemischen Reihe konnte gefunden werden.
Abstract: Das thermische Verhalten einer Anzahl komplexer Verbindungen des Typs [FeII(CN)5L]5− wurde mittels thermogravimetrischer und Differential-Thermoanalyse untersucht. Eine einfache Korrelation zwischen der Zersetzungstemperatur und der Lage des Liganden L in der spektrochemischen Reihe konnte gefunden werden. Die aus dem Studium der festen Zersetzungsprodukte erhaltenen experimentellen Beweise gestatten es, einige Zersetzungsschemata aufzustellen.

18 citations


Journal ArticleDOI
TL;DR: In this article, the infrared and laser-Raman spectra of crystalline Mg3(VO4)2 are reported and a factor group analysis for the full lattice is presented to support the discussion.
Abstract: The infrared and laser-Raman spectra of crystalline Mg3(VO4)2 are reported and a factor group analysis for the full lattice is presented to support the discussion. The 1,000 to 600 cm−1 region of the spectrum is essentially related to internal (stretching) modes of the greatly distorted VO4 tetrahedra, whereas the bands in the low frequency region must be assigned to complex vibrations originating in the interaction of the bending vibrations of the tetrahedral groups with the external modes.

13 citations


Journal ArticleDOI
TL;DR: In this article, the infrared and laser-Raman spectra of crystalline Pb2V2O7 were reported and discussed with the aid of a Site Symmetry-analysis.
Abstract: The infrared and laser-Raman spectra of crystalline Pb2V2O7 are reported and discussed with the aid of a “Site Symmetry”-analysis.

8 citations


Journal ArticleDOI
TL;DR: In this paper, the mean amplitudes of vibration of a series of tetrahedralXY4 molecules and ions (hydrides, halides, oxides and oxoanions) have been calculated using the "Method of the Characteristic Vibrations" of A. Muller.
Abstract: Mean amplitudes of vibration of a series of tetrahedralXY4 molecules and ions (hydrides, halides, oxides and oxoanions) have been calculated using the “Method of the Characteristic Vibrations” ofA. Muller. The results indicate that this method leads to very good values for most of the investigated species, and especially in the cases of highMX/MY mass ratio.

6 citations


Journal ArticleDOI
TL;DR: In this paper, it was shown that NH4MnAsO4·H2O7 crystallizes in the monoclinic thortveitite structure and its i.r. spectrum was recorded and discussed in relation with their structural properties.
Abstract: Mn2As2O7 has been obtained by solid state reaction between As2O5 and MnCO3 at 600 °C and also by thermal decomposition of NH4MnAsO4·H2O. The crystallographic study has shown that the substance crystallizes in the monoclinic thortveitite structure. Its i.r. spectrum was recorded and discussed in relation with their structural properties. The i.r. spectrum of the parent compound NH4MnAsO4·H2O was also briefly discussed.

5 citations


Journal ArticleDOI
TL;DR: The thermal behavior of Na5[Fe(CN)5SO3]·2H2O has been investigated by thermogravimetric and differential thermal analysis as discussed by the authors.
Abstract: The thermal behaviour of Na5[Fe(CN)5SO3]·2H2O has been investigated by thermogravimetric and differential thermal analysis. Detailed studies of the decomposition residues using various physicochemical methods show that decomposition occurs in a manner similar to that previously postulated for related compounds.

3 citations


Journal ArticleDOI
TL;DR: In this paper, a spectroscopic study reveals that TcO3F posses C3v symmetry, and the values found for the fundamental vibrations are in good agreement with those previously estimated by Muller et al.
Abstract: Pertechnetyl fluoride, TcO3F, had been prepared some years ago1, but its vibrational spectrum was only recently recorded and interpreted2. The spectroscopic study reveals that, as expected, TcO3F posseses C3v symmetry, and the values found for the fundamental vibrations are in good agreement with those previously estimated by Muller et al.3 in a paper concerning with the vibrational behaviour of MO3Xn− species, and some systematic relations among them (cf. also4).

2 citations


Journal ArticleDOI
TL;DR: The mean amplitudes of vibration for the tetrahedral AlH4− and AlD4− ions have been calculated from known spectroscopic data in this paper, and the results are briefly discussed.
Abstract: The mean amplitudes of vibration for the tetrahedral AlH4− and AlD4− ions have been calculated from known spectroscopic data. The results are briefly discussed.

1 citations


Journal ArticleDOI
TL;DR: In this paper, Braunstein and Clark described the synthesis and vibrational spectra of complexes containing the AuCl2, AuBr2 and AuI2 ions, and calculated values for the mean amplitudes of vibration and some related quantities.
Abstract: Recently, Braunstein and Clark1 described the synthesis and vibrational spectra of complexes containing the AuCl2, AuBr2 and AuI2 ions. In order to obtain a deeper insight into the vibrational properties of these anions it seems interesting to calculate, using the available spectroscopic data, values for the mean amplitudes of vibration and some related quantities.

1 citations



Journal ArticleDOI
TL;DR: In this paper, it is shown that ThV2O7 appears in three polymorphic forms, two of them are crystalline and the third is amorphous, and the structural behaviour of these forms is analyzed with the aid of thermal, x-ray, and spectroscopic methods.
Abstract: Es wird gezeigt, das ThV2O7 in zwei kristallinen und einer amorphen Modifikation vorkommt. Das strukturchemische Verhalten dieser Formen wird an Hand von thermischen, rontgenographischen und spektroskopischen Messungen erlautert. Die Infrarotspektren der drei Phasen werden eingehend besprochen. The Divanadates of Thorium It is shown that ThV2O7 appears in three polymorphic forms, two of them are crystalline and the third is amorphous. The structural behaviour of these forms is analysed with the aid of thermal, x-ray, and spectroscopic methods. The infrared spectra of the three modifications are discussed in detail.