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Structural changes of synthetic paulingite (Na,H-ECR-18) upon dehydration and CO2 adsorption
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dc.contributor.author | Greenaway, A.G. | |
dc.contributor.author | Shin, J. | |
dc.contributor.author | Cox, P.A. | |
dc.contributor.author | Shiko, E. | |
dc.contributor.author | Thompson, S.P. | |
dc.contributor.author | Brandani, S. | |
dc.contributor.author | Hong, S.B. | |
dc.contributor.author | Wright, P.A. | |
dc.date.accessioned | 2015-07-03T11:40:03Z | |
dc.date.available | 2015-07-03T11:40:03Z | |
dc.date.issued | 2015-04 | |
dc.identifier.citation | Greenaway , A G , Shin , J , Cox , P A , Shiko , E , Thompson , S P , Brandani , S , Hong , S B & Wright , P A 2015 , ' Structural changes of synthetic paulingite (Na,H-ECR-18) upon dehydration and CO 2 adsorption ' , Zeitschrift fur Kristallographie , vol. 230 , no. 4 , pp. 223-231 . https://doi.org/10.1515/zkri-2014-1824 | en |
dc.identifier.issn | 0044-2968 | |
dc.identifier.other | PURE: 189023801 | |
dc.identifier.other | PURE UUID: d2e3935f-b2a0-4527-b29e-38e24a172d3b | |
dc.identifier.other | Scopus: 84929012719 | |
dc.identifier.other | WOS: 000353161400004 | |
dc.identifier.other | ORCID: /0000-0002-4243-9957/work/62668290 | |
dc.identifier.uri | https://hdl.handle.net/10023/6903 | |
dc.description | Funding: EPSRC | en |
dc.description.abstract | The structure of dehydrated calcined ECR-18, synthetic paulingite, topology type PAU, unit cell composition Na132H28Si512Al160O1344, has been determined by Rietveld refinement against synchrotron X-ray powder diffraction data. Upon dehydration the symmetry of Na,H-ECR-18 changes from Im3m to I 43m, with a corresponding decrease of cubic unit cell a parameter from 34.89412(1) A to 33.3488(3) A. This occurs as the framework distorts to afford closer coordination of Na+ cations by framework O atoms in 8-ring window sites of the seven cage types present. Na+ cations in 8R sites block the access of N2 molecules to the internal pore space at 77 K but CO2 adsorption at 308 K is observed, and is postulated to occur via a 'trapdoor' mechanism. In situ PXRD during CO2 adsorption at pressures up to 10 bar show reversible broadening of diffraction peaks that is attributed to local crystallographic strain. | |
dc.format.extent | 9 | |
dc.language.iso | eng | |
dc.relation.ispartof | Zeitschrift fur Kristallographie | en |
dc.rights | (c) 2014, Paul A. Wright et al., published by De Gruyter. This article is distributed under the terms of the Creative Commons Attribution 3.0 Public License. (CC BY 3.0) | en |
dc.subject | Carbon dioxide adsoption | en |
dc.subject | Cation locations | en |
dc.subject | Dehydrated structure | en |
dc.subject | Synthetic paulingite | en |
dc.subject | Trapdoor zeolite | en |
dc.subject | QD Chemistry | en |
dc.subject | NDAS | en |
dc.subject.lcc | QD | en |
dc.title | Structural changes of synthetic paulingite (Na,H-ECR-18) upon dehydration and CO2 adsorption | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | en |
dc.description.version | Publisher PDF | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.identifier.doi | https://doi.org/10.1515/zkri-2014-1824 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | EP/J02077X/1 | en |
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