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[en] IR absorption spectra of α-VOPO4, VPO4, V4(P2O7)3, (VO)2P2O7 in the range of 400-4000 cm-1 are considered. An empirical correlation equation is proposed to determine absorption frequencies of metal-oxygen bounds in phosphates of multivalent metals. The equation describes satisfactorily the dependence of maximum frequency of oscillations of the M3+-O bond on cation mass, bond length and ionization potential
Journal
Izv. Akad. Nauk SSSR, Neorg. Mater; ISSN 0002-337X; 
; v. 15(8); p. 1428-1431
; v. 15(8); p. 1428-1431