DC Field | Value | Language |
---|---|---|
dc.date.accessioned | 2016-04-01T08:53:58Z | - |
dc.date.available | 2016-04-01T08:53:58Z | - |
dc.date.issued | 2009-03 | - |
dc.identifier.citation | BULLETIN OF THE KOREAN CHEMICAL SOCIETY | - |
dc.identifier.citation | v.30 | - |
dc.identifier.citation | no.3 | - |
dc.identifier.citation | pp.543-550 | - |
dc.identifier.issn | 0253-2964 | - |
dc.identifier.other | 2009-OAK-0000016516 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/29011 | - |
dc.description.abstract | The single-crystal structure of largely ammonium-exchanged zeolite Y dehydrated at room temperature (293 K) and 1 x 10(-6) Torr. has been determined using synchrotron X-radiation in the cubic space group Fd (3) over barm (a 24.9639(2) angstrom) at 294 K. The structure was refined to the final error index R-1 = 0.0429 with 926 reflections where F-o > 4 sigma(F-o) | - |
dc.description.abstract | the composition (best integers) was identified as vertical bar(NH4)(60)Na-11 vertical bar[Si121Al71O384]-FAU. The 11 Na+ ions per unit cell were found at three different crystallographic sites and 60 NH4+ ions were distributed over three sites. The 3 Na+ ions were located at site I, the center of the hexagonal prism (Na-O = 2.842(5) angstrom and O-Na-O = 85.98(12)degrees). The 4 Na+ and 22 NH4+ ions were Pound at site I' in the sodalite cavity opposite the double 6-rings, respectively (Na-O = 2.53(13) angstrom, O-Na-O = 99.9(7)degrees, N-O = 2.762(11) angstrom, and O-N-O = 89.1(5)degrees). About 4 Na+ ions occupied site II (Na-O = 2.40(4) angstrom and O-Na-O = 108.9(3)degrees) and 29 NH4+ ions occupy site II (N-O = 2.824(9) angstrom and O-N-O = 87.3(3)degrees) opposite to the single 6-rings in the supercage. The remaining 9 NH4+ ions were distributed over site III' (N-O = 2.55(3), 2.725(13) angstrom and O-N-O = 94.1(13), 62.16(15), 155.7(14)degrees). | - |
dc.description.statementofresponsibility | X | - |
dc.publisher | KOREAN CHEMICAL SOC | - |
dc.subject | Zeolite Y | - |
dc.subject | Ammonium-exchange | - |
dc.subject | Single-crystal X-ray diffraction | - |
dc.subject | Crystal structure | - |
dc.subject | PARTIALLY COBALT(II)-EXCHANGED ZEOLITE | - |
dc.subject | ETHYLENE SORPTION COMPLEX | - |
dc.subject | NEAR-ZERO-COORDINATE | - |
dc.subject | EXCHANGED ZEOLITE | - |
dc.subject | X-RAY | - |
dc.subject | NA-X | - |
dc.subject | ION | - |
dc.subject | CLUSTERS | - |
dc.subject | OXYGEN | - |
dc.subject | TL+ | - |
dc.title | Single-crystal Structure of Fully Dehydrated and Largely NH4+-exchanged Zeolite Y (FAU, Si/Al=1.70), vertical bar(NH4)(60)Na-11 vertical bar[Si121Al71O384]-FAU | - |
dc.type | Article | - |
dc.relation.volume | 30 | - |
dc.relation.issue | 3 | - |
dc.relation.startpage | 543 | - |
dc.relation.lastpage | 550 | - |
dc.publisher.location | KO | - |
dc.relation.journal | BULLETIN OF THE KOREAN CHEMICAL SOCIETY | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.docType | Article | - |
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