ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Crystal-structure of Cd(VO₃)₂.4H₂O and its comparison with the structure of  Ca(VO₃)₂.4H₂O and α-Cd(VO₃)₂

Ľ. Ulická

Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, 84215 Bratislava

Abstract: Crystals of Cd(V0₃)₂•4H₂0 were prepared by the reaction between Cd(CH₃COO)₂ and NH₄V0₃ in aqueous solution. The compound crystal­ lizes in the monoclinic system, the space group is Cc, a = 1.3319(6) nm, b = 1.0344(5) nm, с = 0.7044(2) nm, ß = 111.51(3)° and there are four formula units in the unit cell. The structure was determined and refined by conventional methods using data measured on an automatic diffractometer. The final R value was 0.040 for 890 observed diffractions. Each vanadium atom is coordinated by five oxygen atoms forming a tetragonal pyramid which is connected with the others into the chain parallel to the с axis. The cadmium atom is coordinated octahedrally by four oxygen atoms and two water molecules. The relation between the structure of Cd(V0₃)₂•4H₂0, Ca(V0₃)₂ -4H₂0, and α-Cd(V0₃)₂ is discussed.

Full paper in Portable Document Format: 421a11.pdf

Chemical Papers 42 (1) 11–19 (1988)