Mutual influence of ammonium hexafluorotitanate and hexafluorosilicate in ammonium fluoride solutions

Autor:	E. V. Parshina, P. S. Gordienko, N. G. Bakeeva
Rok vydání:	2010
Předmět:	chemistry.chemical_classification Silicon Inorganic chemistry chemistry.chemical_element Salt (chemistry) Ammonium fluoride General Chemistry chemistry.chemical_compound Hydrolysis chemistry Reagent Isomorphous substitution Phase (matter) Ammonium
Zdroj:	Russian Journal of General Chemistry. 80:223-226
ISSN:	1608-3350 1070-3632
DOI:	10.1134/s1070363210020052
Popis:	Conditions for the hydrolysis of a titanium salt without adding alkaline reagents arise in the system (NH4)2TiF6-(NH4)2SiF6-NH4F-H2O. The hydrolysis is caused by a more alkaline pH of the (NH4)2SiF6 solution in the presence of NH4F as compared to the pH of the (NH4)2TiF6 hydrolysis beginning in a solution of NH4F of the same concentration. In the bottom phase isolated from the above system at 25°C, (NH4)2SiF6 is identified not in the cryptohalite form corresponding to the modification of the initial silicon salt, but in the bararite form. This transfer is caused by the isovalent isomorphous substitution of Si+4 ions for Ti+4 in the complex TiF62−.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3eedc6f0a337f817bf87fcdac6e7a917 https://doi.org/10.1134/s1070363210020052 Zobrazit plný text záznamu Plný text ve formátu PDF