Vibrational properties of LaPO4 nanoparticles in mid- and far-infrared domain

• DOI: 10.1063/1.4769891
• Publication Date: 2012-12-20T02:47:37Z
• Authors: P. Savchyn; I. Karbovnyk; V. Vistovskyy; A. Voloshinovskii; V. Pankratov; M. Cestelli Guidi; С. Mirri; O. Myahkota; A. Riabtseva; N. Mitina; A. Zaichenko; A. I. Popov
• Keywords: Monoclinic crystal system; Hexagonal phase

Nanopowders of LaPO4 have been grown by sedimentation-micellar method. As-prepared nanoparticles with the average grain size about 8 nm a single-phase hydrated hexagonal structure. After thermal annealing at 600 and 800 °C, increases up to ∼35 ∼50 nm, respectively, structure transforms into monoclinic. IR spectra different were investigated in wide range wavenumbers from 130 5000 cm−1 20–300 K temperature region. Differences between bulk material as well behavior vibrational properties are discussed.