A simplified empirical model for approximation of the `bond valence–bond length' correlation for H—O bonds

The `bond valence (s)-bond length (r)' correlation reported earlier for H-O bonds [Brown (2009). Chem. Rev. 109, 6858-6919] has been closely approximated using the function s = (α - βr)(1/γ), where α = 1.185 (10), β = 0.321 (8) and γ = 0.36.