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Deposition of anatase TiO, thin films on soda-lime glass has been achieved by firing an adhered precursor titanium@) complex of ethylenediamine-N,N,N',"-tetraacetic acid (H,edta) between 450 and 550 "C in air. The coating solution was prepared by the reaction of a neutral [Ti( H,O)(edta)] complex, obtained from TiCl, and H4edta in an air-oxidation process, with dipropylamine in ethanol. The crystal structures of the oxide films on glass substrates were examined by XRD, and some of their optical properties and electronic structure were investigated by XPS. It was shown that TiOz film formation was attainable employing a water-resistant precursor derived from a stable metal complex. The thermal properties of the initial [Ti(H,O)(edta)] complex and the facile preparation of the precursor ethanol solution are also reported.

LETTERSlosses. Assuming an average density of 2 X 10 13 cm 3 , T e = 8 eV and Tj= 15 eV, we estimate an MHD flow time enhanced by the mirror ratio of 200 /us [12] and an ideal multiple-mirror axial diffusive time of about 1 ms [ 1 ]. These have to be compared with radial losses due both to electron-ion collisions and higherorder ion-ion collisions, both enhanced by the nonuniform cross-section [13]. The classical radial losses alone are estimated to give a decay time of 100 /xs, which is about equal to that observed.

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