Matches in SemOpenAlex for { <https://semopenalex.org/work/W2061970378> ?p ?o ?g. }
Showing items 1 to 71 of
71
with 100 items per page.
- W2061970378 endingPage "251" @default.
- W2061970378 startingPage "247" @default.
- W2061970378 abstract "In contrast to many aluminophosphate-based molecular sieves, calcined SAPO-40 ([Si7Al29P28O128]) appears to be remarkably stable at high temperatures in both dry and humid atmospheres. To investigate the structural basis for this unusual stability, a structure refinement of calcined SAPO-40 (Pccn, a = 22.2638(5), b = 13.7788(2), c = 14.1137(2)Å) using the Rietveld method was performed (Rwp = 0.080, Rexp = 0.043 and RF = 0.043). Comparison of the framework structure before and after calcination indicates that the unit cell expansion (1.5% along x and 0.6% along y) is due to small shifts in the positions of all atoms in the framework rather than by any local distortion involving only a few atoms. Diffuse electron density was found in the pores although several different calcination procedures were tried. This may indicate that the calcination was incomplete, but is more likely to be caused by the presence of silica and/or alumina species resulting from a reorganization of the framework during the calcination. The extra-framework material was described by including three additional oxygen positions in the structural model and refining their population parameters. The scattering power corresponds to about 90 electrons per unit cell." @default.
- W2061970378 created "2016-06-24" @default.
- W2061970378 creator A5014873734 @default.
- W2061970378 creator A5030730614 @default.
- W2061970378 creator A5051865871 @default.
- W2061970378 date "1997-10-01" @default.
- W2061970378 modified "2023-09-25" @default.
- W2061970378 title "Rietveld refinement of the calcined form of SAPO-40" @default.
- W2061970378 cites W1993875801 @default.
- W2061970378 cites W2017530246 @default.
- W2061970378 cites W2029306212 @default.
- W2061970378 cites W2057475589 @default.
- W2061970378 cites W2059269584 @default.
- W2061970378 cites W2069558497 @default.
- W2061970378 cites W2077802504 @default.
- W2061970378 doi "https://doi.org/10.1016/s0927-6513(97)00034-5" @default.
- W2061970378 hasPublicationYear "1997" @default.
- W2061970378 type Work @default.
- W2061970378 sameAs 2061970378 @default.
- W2061970378 citedByCount "5" @default.
- W2061970378 countsByYear W20619703782013 @default.
- W2061970378 countsByYear W20619703782022 @default.
- W2061970378 crossrefType "journal-article" @default.
- W2061970378 hasAuthorship W2061970378A5014873734 @default.
- W2061970378 hasAuthorship W2061970378A5030730614 @default.
- W2061970378 hasAuthorship W2061970378A5051865871 @default.
- W2061970378 hasConcept C115624301 @default.
- W2061970378 hasConcept C115645028 @default.
- W2061970378 hasConcept C144024400 @default.
- W2061970378 hasConcept C149923435 @default.
- W2061970378 hasConcept C161790260 @default.
- W2061970378 hasConcept C178790620 @default.
- W2061970378 hasConcept C185592680 @default.
- W2061970378 hasConcept C192562407 @default.
- W2061970378 hasConcept C199289684 @default.
- W2061970378 hasConcept C2908647359 @default.
- W2061970378 hasConcept C7082614 @default.
- W2061970378 hasConcept C8010536 @default.
- W2061970378 hasConceptScore W2061970378C115624301 @default.
- W2061970378 hasConceptScore W2061970378C115645028 @default.
- W2061970378 hasConceptScore W2061970378C144024400 @default.
- W2061970378 hasConceptScore W2061970378C149923435 @default.
- W2061970378 hasConceptScore W2061970378C161790260 @default.
- W2061970378 hasConceptScore W2061970378C178790620 @default.
- W2061970378 hasConceptScore W2061970378C185592680 @default.
- W2061970378 hasConceptScore W2061970378C192562407 @default.
- W2061970378 hasConceptScore W2061970378C199289684 @default.
- W2061970378 hasConceptScore W2061970378C2908647359 @default.
- W2061970378 hasConceptScore W2061970378C7082614 @default.
- W2061970378 hasConceptScore W2061970378C8010536 @default.
- W2061970378 hasIssue "5-6" @default.
- W2061970378 hasLocation W20619703781 @default.
- W2061970378 hasOpenAccess W2061970378 @default.
- W2061970378 hasPrimaryLocation W20619703781 @default.
- W2061970378 hasRelatedWork W1973453559 @default.
- W2061970378 hasRelatedWork W2002568733 @default.
- W2061970378 hasRelatedWork W2063109403 @default.
- W2061970378 hasRelatedWork W2065515898 @default.
- W2061970378 hasRelatedWork W2265594156 @default.
- W2061970378 hasRelatedWork W2361528211 @default.
- W2061970378 hasRelatedWork W2388200455 @default.
- W2061970378 hasRelatedWork W2535777392 @default.
- W2061970378 hasRelatedWork W121975792 @default.
- W2061970378 hasRelatedWork W2338960258 @default.
- W2061970378 hasVolume "11" @default.
- W2061970378 isParatext "false" @default.
- W2061970378 isRetracted "false" @default.
- W2061970378 magId "2061970378" @default.
- W2061970378 workType "article" @default.