Please use this identifier to cite or link to this item:
https://dspace.ffh.bg.ac.rs/handle/123456789/1600| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Dimitrijević, Radovan | en_US |
| dc.contributor.author | Dondur, Vera | en_US |
| dc.date.accessioned | 2022-12-21T16:08:36Z | - |
| dc.date.available | 2022-12-21T16:08:36Z | - |
| dc.date.issued | 2007-01-01 | - |
| dc.identifier.issn | 0352-5139 | en |
| dc.identifier.uri | https://dspace.ffh.bg.ac.rs/handle/123456789/1600 | - |
| dc.description.abstract | The thermal behaviours of fully Mg2+ cation exchanged LTA, FAU (X and Y species), GIS and SOD zeolites were investigated in the temperature range from ambient to 1400°C. The initial zeolite frameworks collapsed into amorphous intermediate substances after air heating between 800-850°C. Prolonged annealing of these products above 850°C induced recrystallization into sapphirine-like phases (Mg-LTA and Mg-FAUx zeolites) and μ-cordierite (Mg-FAUy and Mg-GIS zeolites) phases. These phases were unstable during further temperature/time treatment and between 1000-1100°C they polymorphously transformed into γ-cordierite, a new Mg2Al4Si5O18 polymorph. γ-Cordierite was formed as a transformation product from the investigated zeolite precursors, except for the Mg-SOD zeolite. Structurally the γ-cordierite phase is a modulated, Mg-stuffed derivative of cristobalite with the approximate composition Mg2Al4Si 5O18, which precedes the appearance of α-cordierite. The orthorhombic unit cell dimensions calculated from X-ray powder diffraction pattern are: a = 16.387(7) Å, b = 8.835(4) Å, c = 7.853(3) Å. γ-Cordierite has a narrow range of temperature stability (1100-1200°C) and during prolonged temperature/time treatment, it is polymorphously transformed to the α-cordierite phase. | en |
| dc.relation.ispartof | Journal of the Serbian Chemical Society | en |
| dc.subject | Phase stability | en |
| dc.subject | Thermal conversion | en |
| dc.subject | γ-cordierite new polymorph | en |
| dc.title | Thermally induced conversion of Mg<sup>2+</sup> cation exchanged LTA, FAU, GIS and SOD zeolites: Syntheses and characterization of γ-cordierite, a new Mg<inf>2</inf>Al<inf>4</inf>Si<inf>5</inf>O<inf>18</inf> polymorph | en_US |
| dc.type | Article | en_US |
| dc.identifier.doi | 10.2298/JSC0712351D | - |
| dc.identifier.scopus | 2-s2.0-36949001568 | - |
| dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/36949001568 | - |
| dc.relation.firstpage | 1351 | en |
| dc.relation.lastpage | 1362 | en |
| dc.relation.issue | 12 | en |
| dc.relation.volume | 72 | en |
| item.grantfulltext | none | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | No Fulltext | - |
| item.cerifentitytype | Publications | - |
| item.openairetype | Article | - |
| crisitem.author.orcid | 0000-0003-3507-3966 | - |
| Appears in Collections: | Journal Article | |
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