Negative thermal expansion and linear compressibility in 1H-imidazol-3-ium 2-hydroxybenzoate with a helical network of hydrogen bonds

1H-imidazol-3-ium-2-hydroxybenzoate (imidazolium salicylate or SalImi) is an organic molecular crystal with helical hydrogen-bonded network. Crystallographic structure and quantum theory of atoms in molecule calculations are used to analyse the helical...