was dissolved in deionized water. The two precursor
solutions were mixed homogeneously and allowed to precipitate
using a NaOH and Na2CO3 basic solutions at a constant pH of 10
and controlled by slow addition in metal salt mixture. The sample
was stirred for 24 h at 60 C. Finally, the precipitate formed was
then filtered, washed until the pH of the filtrate was 7 and dried at