Aluminates and Haloaluminates

Hot Ba(NO3)2 solution (330K) was acidified with HNO3 to pH 1, and mixed with A1(NO3)3. The mixture was poured with stirring at 330K into (NI Ojt/Oj solution. The final pH was 7.5-8. The precipitate was aged for 3 h at 33OK, then washed and dried. It was then calcined for 10 h at 1670K. 

Properties Ba Al ratio 1 12, specific surface area 15 m /g. TEM image and FTIR spectra available [672], 

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