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Updated: Sep 27, 2025

Characterization of Nanocrystal Size Distribution using Raman Spectroscopy with a Multi-particle Phonon Confinement Model
Published on: August 22, 2015
Anisotropic crystallite size distributions in LiFePO4 powders
Alexander Bobyl1, Igor Kasatkin2
1Ioffe Institute Politekhnicheskaya ul. 26 St. Petersburg 194021 Russia bobyl@theory.ioffe.ru.
Abstract:
The anisotropic crystallite sizes in high-performance LiFePO4 powders were measured by XRD and compared with the particle sizes found by TEM image analysis. Lognormal particle size distribution functions were determined for all three main crystallographic axes. A procedure was developed to determine the fraction of the composite particles which consists of several crystallites and contains small- and large-angle boundaries. In a sample with the most anisotropic crystallites (ratio of volume-weighted mean crystallite sizes L̄ /L̄ = 1.41) the number of the composite particles was at least 30%.
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