Studies of zinc-chromium hydroxy salts. I. Thermal decomposition of [Zn2Cr(OH)6]X · nH2O, where
| Autor: | Arthur T. Howe, Misri Lal |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Ion exchange
Thermal decomposition Inorganic chemistry chemistry.chemical_element Ionic bonding Zinc Condensed Matter Physics Decomposition Electronic Optical and Magnetic Materials Inorganic Chemistry Chromium chemistry Materials Chemistry Ceramics and Composites Water of crystallization Angstrom Physical and Theoretical Chemistry Nuclear chemistry |
| Zdroj: | Journal of Solid State Chemistry. 39:368-376 |
| ISSN: | 0022-4596 |
| Popis: | We have characterized the layered anion exchange compounds [Zn 2 Cr(OH) 6 ] X · n H 2 O, where X − = F − , CI − , Br − , I − , 1 2 CO 2− 3 , and NO − 3 , and studied their thermal decomposition. The precipitated particles were less than a few hundred angstroms in size, and could not be easily aged. Upon heating, a considerable amount of surface water, up to n = 1 in the formula, was initially lost, followed by the ill-defined stages represented by loss of water of hydration ( n ≤ 2), first stage of dehydroxylation, loss of X (over temperature ranges between 200 and 500°C) and final dehydroxylation (up to 700°C). Interest in such possible mixed O 2− /OH − / X − decomposition intermediates as ionic conductors is discussed. |
| Databáze: | OpenAIRE |
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