Otro
Morfologia e cristalinidade de hidroxicarbonato de zinco obtido via precipitação homogênea: influência dos ânions cloreto e nitrato
Registration in:
Química Nova. Sociedade Brasileira de Química, v. 23, n. 5, p. 627-631, 2000.
0100-4042
10.1590/S0100-40422000000500011
S0100-40422000000500011
S0100-40422000000500011.pdf
Author
Sigoli, Fernando Aparecido
Pires, Ana Maria
Stucchi, Elizabeth Berwerth
Jafelicci Júnior, Miguel
Davolos, Marian Rosaly
Abstract
The effects of chloride and nitrate anions and their respective concentrations, as well as urea presence, on solid phase morphologies were investigated. Zinc hydroxide carbonate was prepared by aging diluted zinc salt solution in presence of urea at 90ºC. Samples were identified by X-ray powder diffractograms showing the characteristic patterns of hydrozincite. The crystallinity was correlated with the concentrations of reagents. Spherulitic-type aggregates and single acicular particles were obtained from diluted chloride and nitrate solutions while porous aggregates of uniform size were formed from solutions with high chloride and urea concentrations.