Morfologia e cristalinidade de hidroxicarbonato de zinco obtido via precipitação homogênea: influência dos ânions cloreto e nitrato
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Data
2000-10-01
Autores
Sigoli, Fernando Aparecido [UNESP]
Pires, Ana Maria [UNESP]
Stucchi, Elizabeth Berwerth [UNESP]
Jafelicci Júnior, Miguel [UNESP]
Davolos, Marian Rosaly [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Resumo
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.
Descrição
Palavras-chave
zinc hydroxide carbonate, homogeneous precipitation, morphology, spherulites
Como citar
Química Nova. Sociedade Brasileira de Química, v. 23, n. 5, p. 627-631, 2000.