CRYSTAL-CHEMISTRY OF HYDROGEN-OXYGEN BOND S

The interdependence of hydrogen - oxygen distances in inorganic compou nds can be described by a close correlation if sufficiently high coord ination numbers for hydrogen are taken into account. For this purpose, the coordination is favourably defined as chemical coordination numbe r K which is derived from the geometrical coordination or Niggli's Wir kungsbereich. Distances R(i) [pm] from one hydrogen to the surrounding oxygen atoms are connected by the rule that the sum of bond valences, s(R(i)) equals the valence of hydrogen: [GRAPHICS]