Showing papers by "Enrique J. Baran published in 1974"
TL;DR: In this paper, the crystal chemistry and IR spectra of divanadates of the type M2V2O7 are discussed and comparisons are made with corresponding diphosphates results of the X-ray investigation (powder method).
Abstract: Das kristallchemische Verhalten von Divanadaten des Typs M2V2O7 wird besprochen und mit demjenigen der entsprechenden Diphosphate verglichen Ergebnisse der rontgenographischen Untersuchungen (Pulver-Methode) von Cu2V2O7, Mg2V2O7, Co2V2O7, Ni2V2O7 und Zn2V2O7 werden mitgeteilt und diskutiert Die IR-Spektren dieser Verbindungen sowie auch diejenigen von Cd2V2O7 und Mn2V2O7 wurden im Bereich zwischen 4000 und 300 cm−1 gemessen und interpretiert Alle Ergebnisse weisen auf das Vorhandensein von relativ starken Storungen der V2O-Gruppen in den Kristallgittern hin
Crystal Chemistry and IR Spectra of Some Divanadates of the Thortveitit Type and Related Structures
Some aspects of the crystal chemistry of divanadates of the type M2V2O7 are discussed and comparisons are made with the corresponding diphosphates Results of the X-ray investigation (powder method) of Cu2V2O7, Mg2V2O7, Co2V2O7, Ni2V2O7 and Zn2V2O7 are also reported and commented The infrared spectra of these compounds as well as those of Cd2V2O7 and Mn2V2O7 are recorded between 4000 and 300 cm−1 and briefly discussed The results show that the V2O groups are subjected to relatively important distortions in the crystal lattices
36 citations
TL;DR: In this paper, the infrared and laser Raman spectra of crystalline As 2 O 7 4− ion were analyzed using a simplified molecular model, and the principal force constants for the ion were derived.
23 citations
TL;DR: In this paper, it is shown that ThV2O7 appears in three polymorphic forms, two of them are crystalline and the third amorphous The structural behaviour of these forms is analysed 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
16 citations
11 citations
TL;DR: In this article, the mean amplitudes of vibration of a series of XF6 compounds have been calculated using the "method of the characteristic vibrations" of A. Muller, and the results indicate that this method leads to very good values, also in the case of highly symmetric species.
Abstract: Mean amplitudes of vibration of a series ofXF6 compounds have been calculated using the “method of the characteristic vibrations” ofA. Muller. The results indicate that this method leads to very good values, also in the case of highly symmetric species.
8 citations
TL;DR: In this paper, the mean amplitudes of vibration for the octahedral IF6+ ion have been calculated from spectroscopic data using the method of the characteristic vibrations of A. Muller.
Abstract: Mean amplitudes of vibration for the octahedral IF6
+ ion have been calculated from spectroscopic data using the “Method of the Characteristic Vibrations” ofA. Muller. The results are briefly discussed in relation with those of isoelectronic species and with known data for other compounds containing I-F bonds.
5 citations
TL;DR: In this article, the mean amplitudes of vibration of a series of XF6 compounds have been calculated using the "method of the characteristic vibrations" of A. Muller, and the results indicate that this method leads to very good values, also in the case of highly symmetric species.
Abstract: Mean amplitudes of vibration of a series ofXF6 compounds have been calculated using the “method of the characteristic vibrations” ofA. Muller. The results indicate that this method leads to very good values, also in the case of highly symmetric species.
TL;DR: Mean amplitudes of vibration for the octahedral IF6+ ion have been calculated from spectroscopic data using the "Method of the Characteristic Vibrations" of A. Muller.
Abstract: Mean amplitudes of vibration for the octahedral IF6+ ion have been calculated from spectroscopic data using the “Method of the Characteristic Vibrations” ofA. Muller. The results are briefly discussed in relation with those of isoelectronic species and with known data for other compounds containing I-F bonds.