Original scientific paper

https://doi.org/10.5562/cca2298

Lattice Enthalpies of Lanthanide Orthovanadates LnVO4

Dimitar Petrov orcid.org/0000-0002-5709-3039 ; Department of Physical Chemistry, Plovdiv University, 24, Tsar Asen Str., 4000 Plovdiv, Bulgaria

Abstract

Lattice enthalpies ΔLH° of lanthanide orthovanadates, LnVO4 (Ln = Ce - Lu, except Pm) have been deter-mined from the Born-Haber thermochemical cycle and compared with those calculated by an empirical equation. Two different sets of enthalpies of formation of LnVO4, from oxides (Ln2O3, V2O5) and from elements, have been used but the differences in ΔLH° are small. The Born-Haber cycle in both routes yields close values of ΔLH° to those obtained after an empirical equation proposed by Glasser and Jenkins. It has been found that the partial derivative of the lattice enthalpies to the molar volumes corresponds by magnitude and dimension to the shear moduli of these crystals. (doi: 10.5562/cca2298)

Keywords

lattice enthalpies; lanthanide orthovanadates; shear moduli; thermochemistry; Born-Haber cycle

Hrčak ID:

122284

URI

https://hrcak.srce.hr/122284

Publication date:

30.4.2014.

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