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- W826542941 abstract "was synthesized using colloidal earth (Allophane) as the starting material and some of its were studied in detail. It was found that Dawsonite was formed in the pH range (pH 12.5~12.0) that the concentration of was just begun to increase and the presence of in the product was clarified from the infrared absorption spectrum. The chemical formular of Dawsonite was therefore presumed as . From toahhe results of X-ray powder diffraction, both peaks at 5.7 and 2.8 were observed, and fibrous crystalline structure was observed from electron micrograph and also found from the microscopic electron diffraction at 5.7 Therefore the fibrous axis was considered as =Al=O2=Al=O2=Al=(*image) direction. True specific gravity of Dawsonite was 2.44 and its porosity was 91.4%. It was practically insoluble in water, but decomposed in the boiling water to form Pseudo Boehmite. Stable pH range of Dawsonite was about 4.5~11.5. From the results of D.T.A. and T.G.A., it was observed that was liberated at , and at , and converted into strongly hygroscopic , which was easily decomposed in water into and NaOH." @default.
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- W826542941 date "1969-01-01" @default.
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- W826542941 title "Some Physical and Chemical Properties of Synthesized Dawsonite" @default.
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