Dynamics of a complex diffusion-precipitation-re-dissolution Liesegang pattern

Autor:	Maysam Msharrafieh, Rabih Sultan
Rok vydání:	2006
Předmět:	Crystallography Chemistry Precipitation (chemistry) Diffusion General Physics and Astronomy Physical and Theoretical Chemistry Dissolution
Zdroj:	Chemical Physics Letters. 421:221-226
ISSN:	0009-2614
DOI:	10.1016/j.cplett.2006.01.054
Popis:	A complex behavior in a Liesegang system involving the precipitates Co(OH) 2 and Ni(OH) 2 is reported. Under a special choice of initial cation concentrations (Experiment III), a sequence of three band domains: BA (thin-medium), AA (medium-medium) and CA (thick-medium) repetitions is displayed, as opposed to a traditional periodic pattern observed over a range of Co 2+ and Ni 2+ concentrations (Experiments I and II). The dynamics involves diffusion, precipitation and re-dissolution, and is analyzed quantitatively. Oscillations in the % Co(OH) 2 composition dominate the BA and AA regions, which later regularize into a monotonic and smooth decrease when the CA domain is reached.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6e458215b417b4a52b7ff5beb3fbf6d0 https://doi.org/10.1016/j.cplett.2006.01.054 Zobrazit plný text záznamu Full Text from ScienceDirect