A network of hydrogen bonds in the lattice of heavy atoms of single crystals of the KDP group: quantum nature of dipole interactions

In the work presented, the distinctive features of temperature behavior of dielectric permittivity epsilon, dielectric loss tangent tan delta and pyroelectric coefficient gamma of classical ferroelectric KDP and crystals of its family, which have a network of strong OH horizontal ellipsis O hydrogen bonds, are discussed. Particular attention is focused on the evidence of quantum-chemical interactions in network of hydrogen bonds in the matrix of heavy nuclei.