Showing papers by "Enrique J. Baran published in 1980"
TL;DR: The infrared spectra of orthoarsenates with apatite structure, of the formulaM5(AsO4)3X (M=Ca, Sr, Ba, Pb andX=F, Cl,Br) are measured and interpreted on the basis of a site-symmetry analysis as mentioned in this paper.
Abstract: The infrared spectra of orthoarsenates with apatite structure, of the formulaM5(AsO4)3X (M=Ca, Sr, Ba, Pb andX=F, Cl,Br) are measured and interpreted on the basis of a site-symmetry analysis. The influence of the different cations on the internal vibrations of the AsO34-ions is discussed.
12 citations
TL;DR: In this paper, the infrared spectra of different phases of composition Cd X M 10−X (PO 4 ) 6 X 2 structurally related to calcium fluoroapatite has been investigated and the distortive effects produced by the Cd(II) ion In these lattices discussed.
8 citations
TL;DR: In this article, the Raman spectrum of the tetragonal modification of LaVO4 is reported for the first time, and it is shown that the V-O bond strenghtening runs parallel to the unit cell contraction.
Abstract: Abstract Force Constants of the VO43- Ion in the different rare earth orthovanadates of the zircon type have been computed using a modified valence force field and recently reported Raman data. It is shown that the V-O bond strenghtening runs parallel to the unit cell contraction. The Raman spectrum of the tetragonal modification of LaVO4 is reported for the first time.
8 citations
TL;DR: In this article, the infrared and laser-Raman spectra of crystalline Ba5 (ReO5)3Br are reported and an assignment for the internal vibrations of the square pyramidal ReO3−5 anion is proposed.
Abstract: The infrared and laser-Raman spectra of crystalline Ba5 (ReO5)3Br are reported and an assignment for the internal vibrations of the square pyramidal ReO3− 5 anion is proposed. Force constants, bond orders and mean amplitudes of vibration are calculated. Some comparisons with other rhenium compounds are made.
4 citations