Die Kristallstruktur von Zinkformiat-Dihydrat

Abstract

Abstract Zinc formate cristallizes isomorphous to the formates of Mg, Sr, Cd, Mn and Ni in the monoclinic space group P21/c. The lattice constants are a = 8.685 Å, b = 7.160 Å, c = 9.323 Å and β = 97.58°. The structure has been refined including an isotropic extinction correction to RF = 0.043. The octahedra of the two nonequivalent zinc atoms are slightly distorted. Zn(l) in (000) is surrounded by six oxygen atoms of the formate groups [distances Zn(l)–O = 2.071 Å–2.145 Å]; the octahedron of Zn(2) in (½½0) consists of the oxygen atoms of the two formate groups and two water molecules [distances Zn(2)–O = 2.053 Å–2.165 Å]. The three-dimensional structure is stabilized by hydrogen bonding between formate groups and water molecules.