摘要：

The basic salts of this system were prepared and their structures and physico--chemical properties were studies by electron microscopy, chemical analysis, X-ray powder diffraction, thermal analysis, i.r. absorption spectra, BET absorption, and acidity-basicity measurements. The salts were found to be new compounds analogous to hydrotalcite. They can be expressed by the formula; (M 2§ M3+(OH)2(x+y)) r+ (A~-A2~ "mH20) -C~t+2~/ where M 2+ and M 3+ denote di- and trivalent cations, A- and A 2- denote mono- and divalent anions, respectively, and y = zl + 2z2 ; zl ~> z2. The structures consist of positively charged Cd(OH)2-1ike basic layers and intermediate layers formed from anions and water molecules with the solid solution of divalent cation (M 2+) and trivalent cation (M 3+) being formed in the range of 0.6

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