title: On the correlations between the polyhedron eccentricity parameters and the bond-valence sums for the cations with one lone electron pair.
abstract: Applicability of the Wang-Liebau polyhedron eccentricity parameter in the bond-valence model [Wang & Liebau (2007). Acta Cryst. B63, 216-228] has been found to be doubtful: the correlations between the values of the polyhedron eccentricity parameters and the bond-valence sums calculated for the cations with one lone electron pair are probably an artifact of the poorly determined bond-valence parameters.
authors.affiliation: Department of Chemistry and Research Institute for Physics and Chemistry of Solids, Uzhgorod National University, Pidgirna Street 46, Uzhgorod 88000, Ukraine. vasylsidey@yahoo.com
authors.forename: Vasyl
authors.initials: V
authors.lastname: Sidey