{"id":1391,"date":"2021-01-28T15:43:12","date_gmt":"2021-01-28T15:43:12","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/nanocarma\/?p=1391"},"modified":"2021-01-28T15:52:33","modified_gmt":"2021-01-28T15:52:33","slug":"new-order-in-bis1-19bi1-3cr2s4-misfit-layer-compound","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/nanocarma\/?p=1391","title":{"rendered":"New Order in (BiS)1.19(Bi1\/3Cr2S4) Misfit Layer Compound"},"content":{"rendered":"

A. G\u00f3mez\u2010Herrero, A. R. Landa\u2010C\u00e1novas and L. C. Otero\u2010D\u00edaz, \u201cNew Order in (BiS)1.19<\/sub>(Bi1\/3<\/sub>Cr2<\/sub>S4<\/sub>) Misfit Layer Compound,\u201d Z. Anorg. Allg. Chem. 647<\/strong>, 1–7 (2021)<\/a>.<\/p>\n

In a sample with nominal composition BiCr2S5 a new misfit layer compound has been synthesized and studied via transmission electron microscopy (TEM). It presents a composite modulated structure with a composition that can be formulated as (BiS)1.19<\/sub>[(CrS2<\/sub>)-Bi1\/3<\/sub>-(CrS2<\/sub>)]. It consists of the periodic stacking of a Q layer (BiS) with two H layers (CrS2<\/sub>), …QHHQHH…, with additional bismuth atoms inserted between the H layers. Selected area electron diffraction (SAED) patterns show an almost commensurate fit between the pseudo-tetragonal Q (BiS) and the pseudo-orthohexagonal H (Bi1\/3<\/sub>Cr2<\/sub>S4<\/sub>) subcells along the misfit direction a, being b the same for both sublattices and c the layers stacking direction. In addition to the characteristic misfit modulation between the two sub-structures, a second modulation is observed in the H sub-structure produced by the ordering of bismuth atoms within the Van der Waals gap that occurs between consecutive H layers. High resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy (STEM) images show ordered stacking sequences between the (BiS) and (Bi1\/3<\/sub>Cr2<\/sub>S4<\/sub>) layers. Besides, disordered intergrowths have been occasionally found as well as different kinds of twinning defects.<\/p>\n

En una muestra con composici\u00f3n nominal BiCr2S5 un nuevo compuesto de \u00abmisfit layer\u00bb ha sido sintetizado y estudiado a trav\u00e9s de microscop\u00eda electr\u00f3nica de transmisi\u00f3n (TEM). Presenta una estructura modulada compuesta con una composici\u00f3n que puede formularse como (BiS)1.19<\/sub>[(CrS2<\/sub>)-Bi1\/3<\/sub>-(CrS2<\/sub>)]. Consiste en el apilamiento peri\u00f3dico de una capa Q (BiS) con dos capas H (CrS2<\/sub>), … QHHQHH…, con \u00e1tomos de bismuto adicionales insertados entre las capas H. Los patrones de difracci\u00f3n de electrones de \u00e1rea seleccionada (SAED) muestran un ajuste casi conmensurable entre las subceldas pseudo-tetragonal Q (BiS) y la pseudo-ortohexagonal H (Bi1\/3<\/sub>Cr2<\/sub>S4<\/sub>) a lo largo de la direcci\u00f3n de \u00abmisfit\u00bb a, siendo b el mismo para ambos subl\u00e1tices y c la direcci\u00f3n de apilamiento de las capas. Adem\u00e1s de la modulaci\u00f3n de \u00abmisfit\u00bb caracter\u00edstica entre los dos subestructuras, se observa una segunda modulaci\u00f3n en la subestructura H producido por el orden de los \u00e1tomos de bismuto dentro de la brecha de Van der Waals que se produce entre capas H consecutivas. La microscop\u00eda electr\u00f3nica de transmisi\u00f3n de alta resoluci\u00f3n (HRTEM) y las im\u00e1genes de microscop\u00eda electr\u00f3nica de transmisi\u00f3n de barrido (STEM) muestran secuencias de apilamiento ordenadas entre capas (BiS) y (Bi1\/3<\/sub>Cr2<\/sub>S4<\/sub>). Adem\u00e1s, los intercrecimientos desordenados han sido ocasionalmente defectos de macla.<\/p>\n

Published in Zeitschrift f\u00fcr anorganische und allgemeine Chemie (Journal of Inorganic and General Chemistry)<\/p>\n

DOI: 10.1002\/zaac.202000379<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

A. G\u00f3mez\u2010Herrero, A. R. Landa\u2010C\u00e1novas and L. C. Otero\u2010D\u00edaz, \u201cNew Order in (BiS)1.19(Bi1\/3Cr2S4) Misfit Layer Compound,\u201d Z. Anorg. Allg. Chem. 647, 1–7 (2021). In a sample with nominal composition BiCr2S5 a new misfit layer compound has been synthesized and studied … Sigue leyendo →<\/span><\/a><\/p>\n","protected":false},"author":77,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[7,9,10,16,1],"tags":[31,62],"class_list":["post-1391","post","type-post","status-publish","format-standard","hentry","category-hrtem","category-microscopy","category-nanocharacterization","category-publications","category-sin-categoria","tag-hrtem","tag-nanocharacterization"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/1391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/users\/77"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1391"}],"version-history":[{"count":5,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/1391\/revisions"}],"predecessor-version":[{"id":1396,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/1391\/revisions\/1396"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}