Structure and spectra character of cobalt nickel sulfate twelvehydrate (CNSH) single crystal

The title compound CoNi(SO4)(2).12H(2)O has been prepared and its crystal structure determined by single crystal X-ray differaction at room temperature. The CNSH crystal structure belongs to the monoclinic space group C2/c,a=9.966(2)Angstrom, b=7.2265(14)Angstrom, c=24.218(5)Angstrom, beta=98.32(3)degrees, V=1725.9(6) Angstrom(3), z=4,Dc=2.024gcm(-3). The optical transmission character of CNSH crystal in aqueous solution is discontinuous in the range from ultraviolet to near IR wavelengths. The relationship between the structure and the optical transmission property is further discussed. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.