A. Clearfield
1970
Citations
0
Influential Citations
10
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract The crystal structure of ammonium di-μ-hydroxo-di[triscarbonatozirconate(IV)]tetrahydrate, (NH 4 ) 6 [Zr(OH)(CO 3 ) 3 ] 2 . 4H 2 O, has been determined. The crystals are monoclinic, P2 1 /n, with cell dimensions a = 16.46 ± 0.02 A, b = 11.53 ± 0.03 A, c = 6.95 ± 0.01 A and β = 92.0 ± 0.2 A. The observed density, 1.87 ± 0.05 g/cm 3 , corresponding to four molecules per unit cell. The crystals consist of discrete dimeric species in which the metal atoms are bridged by hydroxo groups. Each carbonate ion behaves as a bidentate ligand forming with the hydroxo groups a distorted dodecahedron of oxygen atoms about each zirconium atom. The dimers are held in the crystal through the compensating electrostatic charge of the ammonium ions and a network of hydrogen bonds to the water molecules.