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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)

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