Vibrational Spectra of Arsenates and Phosphates of the Type Kcaln(XO4)2

Publisher Website
Google Scholar
Abstract
The infrared and Raman spectra of polycrystal-line samples of different compounds of the types KCaLn(AsO4)2 and KCaLn(PO4)2, belonging to the hexagonal LaPO4, structural modification, were recorded and discussed. A complete vibrational assignment, based on a factor group analysis, is proposed. The influence of the different lanthanide cations on the internal vibrations of the XO4 groups is briefly discussed and some comparisons with related compounds are also made. It is well known that simple lanthanide arsenates, phosphates, vanadates and cnromates (V) of the type LnXO4 belong to two different structural types.