E. Husson et al., THE VIBRATIONAL-SPECTRA OF THE LAYERED COMPOUNDS KSB(PO4)(2) AND CSM(PO4)(2) (M=SB, TA, NB) - NORMAL-COORDINATE ANALYSIS OF KSB(PO4)(2), European journal of solid state and inorganic chemistry, 32(11), 1995, pp. 1077-1088
Infrared and Raman spectra on powder samples of KSb(PO4)(2), CsSb(PO4)
(2), CsTa(PO4)(2) and CsNb(PO4)(2) and polarized Raman spectra on a si
ngle crystal of KSb(PO4)(2) were recorded. A normal coordinate analysi
s using a generalized force field was performed for KSb(PO4)(2). The w
hole results allowed an assignment of the observed frequencies. It was
possible to characterize the P-O, Sb-O and M-O bonds (M = alkaline ca
tion) in layered phosphatoantimonates. The strength of the Sb-O, Ta-O
and Nb-O bonds is compared.