{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T12:07:55Z","timestamp":1790510875171,"version":"4.1.0"},"reference-count":33,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2014,7,1]],"date-time":"2014-07-01T00:00:00Z","timestamp":1404172800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microsc Microanal"],"published-print":{"date-parts":[[2014,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The atomic structure of Cs<jats:sub>0.44<\/jats:sub>[Nb<jats:sub>2.54<\/jats:sub>W<jats:sub>2.46<\/jats:sub>O<jats:sub>14<\/jats:sub>] closely resembles the structure of the most active catalyst for the synthesis of acrylic acid, the M1 phase of <jats:inline-formula><jats:alternatives><jats:graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" orientation=\"portrait\" mime-subtype=\"gif\" mimetype=\"image\" position=\"float\" xlink:type=\"simple\" xlink:href=\"S1431927614001330_eqnU1\"\/><jats:tex-math>\n${\\rm Mo}_{{{\\rm 10}}} {\\rm V}_{{\\rm 2}}^{{{\\rm 4{\\plus}}}} {\\rm Nb}_{2} {\\rm TeO}_{{{\\rm 42}{\\minus}x}} $\n<\/jats:tex-math><\/jats:alternatives><\/jats:inline-formula>. Consistently with observations made for the latter compound, the high-angle electron scattering signal recorded by scanning transmission electron microscopy shows a significant intensity variation, which repeats periodically with the projected crystallographic unit cell. The occupation factors for the individual mixed Nb\/W atomic columns are extracted from the observed intensity variations. For this purpose, experimental images and simulated images are compared on an identical intensity scale, which enables a quantification of the cation distribution. According to our analysis specific sites possess low tungsten concentrations of 25%, whereas other sites have tungsten concentrations above 70%. These findings allow us to refine the existing structure model of the target compound, which has until now described a uniform distribution of the niobium and tungsten atoms in the unit cell, showing that the similarity between Cs<jats:sub>0.44<\/jats:sub>[Nb<jats:sub>2.54<\/jats:sub>W<jats:sub>2.46<\/jats:sub>O<jats:sub>14<\/jats:sub>] and the related catalytic compounds also extends to the level of the cation segregation.<\/jats:p>","DOI":"10.1017\/s1431927614001330","type":"journal-article","created":{"date-parts":[[2014,7,1]],"date-time":"2014-07-01T15:47:10Z","timestamp":1404229630000},"page":"1453-1462","source":"Crossref","is-referenced-by-count":6,"title":["Periodic Cation Segregation in Cs<sub>0.44<\/sub>[Nb<sub>2.54<\/sub>W<sub>2.46<\/sub>O<sub>14<\/sub>] Quantified by High-Resolution Scanning Transmission Electron Microscopy"],"prefix":"10.1093","volume":"20","author":[{"given":"Markus","family":"Heidelmann","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juri","family":"Barthel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gerhard","family":"Cox","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas E.","family":"Weirich","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2014,7,1]]},"reference":[{"key":"S1431927614001330_ref13","doi-asserted-by":"publisher","DOI":"10.1016\/j.ultramic.2009.05.003"},{"key":"S1431927614001330_ref9","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2818.2002.01002.x"},{"key":"S1431927614001330_ref32","doi-asserted-by":"publisher","DOI":"10.1016\/0304-3991(93)90046-Z"},{"key":"S1431927614001330_ref33","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.77.054103"},{"key":"S1431927614001330_ref29","doi-asserted-by":"publisher","DOI":"10.1038\/416826a"},{"key":"S1431927614001330_ref26","doi-asserted-by":"publisher","DOI":"10.1016\/0304-3991(91)90113-K"},{"key":"S1431927614001330_ref3","doi-asserted-by":"publisher","DOI":"10.1016\/j.ultramic.2005.07.002"},{"key":"S1431927614001330_ref20","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.64.938"},{"key":"S1431927614001330_ref15","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889811038970"},{"key":"S1431927614001330_ref19","doi-asserted-by":"publisher","DOI":"10.1016\/0304-3991(89)90173-3"},{"key":"S1431927614001330_ref17","doi-asserted-by":"publisher","DOI":"10.1017\/S1431927606060600"},{"key":"S1431927614001330_ref2","doi-asserted-by":"publisher","DOI":"10.1016\/0304-3991(93)90057-5"},{"key":"S1431927614001330_ref22","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201004502"},{"key":"S1431927614001330_ref11","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.100.206101"},{"key":"S1431927614001330_ref30","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.71.235303"},{"key":"S1431927614001330_ref25","doi-asserted-by":"publisher","DOI":"10.1107\/S0108767391000375"},{"key":"S1431927614001330_ref5","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200705700"},{"key":"S1431927614001330_ref24","doi-asserted-by":"publisher","DOI":"10.1107\/S0108767391004804"},{"key":"S1431927614001330_ref16","doi-asserted-by":"publisher","DOI":"10.1038\/33823"},{"key":"S1431927614001330_ref21","doi-asserted-by":"publisher","DOI":"10.1093\/jmicro\/dfn025"},{"key":"S1431927614001330_ref6","doi-asserted-by":"publisher","DOI":"10.1021\/jp801584m"},{"key":"S1431927614001330_ref12","doi-asserted-by":"publisher","DOI":"10.1021\/nl102025s"},{"key":"S1431927614001330_ref18","doi-asserted-by":"publisher","DOI":"10.1016\/j.ultramic.2008.07.001"},{"key":"S1431927614001330_ref8","doi-asserted-by":"publisher","DOI":"10.1006\/jssc.1999.8575"},{"key":"S1431927614001330_ref23","doi-asserted-by":"publisher","DOI":"10.1107\/S0365110X57002194"},{"key":"S1431927614001330_ref31","doi-asserted-by":"publisher","DOI":"10.1021\/nl300314k"},{"key":"S1431927614001330_ref4","doi-asserted-by":"publisher","DOI":"10.1016\/j.actamat.2010.03.016"},{"key":"S1431927614001330_ref27","doi-asserted-by":"publisher","DOI":"10.1016\/j.ultramic.2010.01.007"},{"key":"S1431927614001330_ref28","unstructured":"Barthel J. 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