Thermal dissociation in air of aluminum hydroxide intercalation compounds with transition-metal EDTA complexes

Thermal dissociation in air of aluminum hydroxide intercalation compounds o f the general formula [LiAl2(OH)(6)],(Medta) . xH(2)O (where M = CU2+, Ni2, Co2+, Zn2+; edta(4-) is an ethylenediaminetetraacetato anion) was investi gated by DTA-TG and X-ray powder diffraction. The ultimate product of calci nation at 1200 degreesC is a mixture of oxides: gamma -LiAlO2, spinel solid solution, and, in cases of nickel and copper, the transition-metal oxide. Scanning electron microscopy showed that, even after high-temperature treat ment, the thermolysis products have a layered morphology similar to the mor phology of virgin samples.