{"id":56,"date":"2011-12-27T11:34:57","date_gmt":"2011-12-27T10:34:57","guid":{"rendered":"http:\/\/www.icmm.csic.es\/matfuelcells\/?page_id=56"},"modified":"2011-12-27T11:34:57","modified_gmt":"2011-12-27T10:34:57","slug":"p-element-perovskites","status":"publish","type":"page","link":"https:\/\/wp.icmm.csic.es\/matfuelcells\/research-lines\/metastable-oxides\/p-element-perovskites\/","title":{"rendered":"p-element perovskites"},"content":{"rendered":"<figure id=\"attachment_327\" aria-describedby=\"caption-attachment-327\" style=\"width: 329px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-content\/uploads\/sites\/36\/2011\/12\/TeNiO3b2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-327\" title=\"TeNiO3b\" src=\"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-content\/uploads\/sites\/36\/2011\/12\/TeNiO3b2.jpg\" alt=\"\" width=\"329\" height=\"309\" srcset=\"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-content\/uploads\/sites\/36\/2011\/12\/TeNiO3b2.jpg 329w, https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-content\/uploads\/sites\/36\/2011\/12\/TeNiO3b2-300x282.jpg 300w\" sizes=\"auto, (max-width: 329px) 100vw, 329px\" \/><\/a><figcaption id=\"caption-attachment-327\" class=\"wp-caption-text\">Extremely distorted Pnma structure of TeNiO3, where the lone pair and small size of Te4+ drive an enormous tilting of the NiO3 octahedra<\/figcaption><\/figure>\n<p>An active Research line is the exploration of new ABO<sub>3<\/sub> and A<sub>2<\/sub>BB\u2019O<sub>6<\/sub> perovskites containing <em>p<\/em> elements with an inert electron pair at the A positions, like Tl<sup>+<\/sup>, Sn<sup>2+<\/sup>, Pb<sup>2+<\/sup>, Sb<sup>3+<\/sup>, Bi<sup>3+<\/sup>, Se<sup>4+ <\/sup>and Te<sup>4+<\/sup>.<\/p>\n<p>These cations create an irregular oxygen-coordination environment; therefore their stabilization in perovskites many times requires the use of high pressure conditions.\u00a0<\/p>\n<p>For instance, recently, TeNiO<sub>3 <\/sub>(with Te<sup>4+<\/sup> at the A-site of the perovskite structure) was stabilized at 3.5 GPa, and the crystal and magnetic structures studied by neutron diffraction..<\/p>\n<p>Concerning double perovskites, two nice examples are Bi<sub>2<\/sub>NiMnO<sub>6<\/sub> and Bi<sub>2<\/sub>CoMnO<sub>6 <\/sub>, prepared under pressure, where the presence of a lone electron pair induces cationic shifts that favours ferroelectricity.<\/p>\n<p><strong>These materials are magneto-ferroelectrics,<\/strong> useful for multiple-memory devices (storage of information with both electrical and magnetic polarization) or memory elements in which a ferroelectric bit is read as a ferromagnetic bit generated by association. For instance, it is predicted a large polarization for Bi<sub>2<\/sub>FeCrO<sub>6<\/sub> which has only been stabilized in thin film form so far: recently its preparation in bulk form has been achieved by this Group.<\/p>\n<p><strong>Recent Publications<\/strong><\/p>\n<p>The role of the Pb2+ 6s lone pair in the structure of the double perovskite Pb2ScSbO6, Larregola, SA, Alonso, JA, Pedregosa, JC, Martinez-Lope, MJ, Alguero, M, De la Pena-O&#8217;shea, V, Porcher, F, Illas, F, DALTON TRANSACTIONS 28, 5453- 5459 (2009)<\/p>\n<p>An Original Polymorph Sequence in the High-Temperature Evolution of the Perovskite Pb2TmSbO6, Larregola, SA, Alonso, JA, Sheptyakov, D, Alguero, M, Mu\u00f1oz, A,\u00a0 Pomjakushin, V\u00a0\u00a0 Pedregosa, JC, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 132, 14470- 14480 (2010)<\/p>\n<p>Effect of the Pb2+ lone electron pair in the structure and properties of the double perovskites Pb2Sc(Ti0.5Te0.5)O-6 and Pb2Sc(Sc0.33Te0.66)O-6: relaxor state due to intrinsic partial disorder, Larregola, SA, Alonso, JA, Alguero, M, Jimenez, R, Suard, E, Porcher, F, Pedregosa, JC, DALTON TRANSACTIONS 39, 5159- 5165 (2010)<\/p>\n<p>High-Temperature Behavior and Polymorphism in Novel Members of the Perovskite Family Pb(2)LnSbO(6) (Ln = Ho, Er, Yb, Lu), Larregola, Sebastian A.; Alonso, Jose A.; Sheptyakov, Denis; Alguero, Miguel; Munoz, Angel; Pomjakushin, Vladimir; Pedregosa, Jose C. INORGANIC CHEMISTRY 50,\u00a0\u00a0 5545-5557 (2011)<\/p>\n<p>High-pressure synthesis and neutron diffraction investigation of the crystallographic and magnetic structure of TeNiO3 perovskite,\u00a0 Martinez-Lope, M. J.; Retuerto, M.; Alonso, J. A.; Sanchez-Benitez, J.; Fernandez-Diaz, M. T., DALTON TRANSACTIONS 40, 4599-4604 (2011)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An active Research line is the exploration of new ABO3 and A2BB\u2019O6 perovskites containing p elements with an inert electron pair at the A positions, like Tl+, Sn2+, Pb2+, Sb3+, Bi3+, Se4+ and Te4+. These cations create an irregular oxygen-coordination environment; therefore their stabilization in perovskites many times requires the use of high pressure conditions.\u00a0&#8230;<\/p>\n","protected":false},"author":66,"featured_media":0,"parent":44,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-56","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/pages\/56","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/users\/66"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/comments?post=56"}],"version-history":[{"count":0,"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/pages\/56\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/pages\/44"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/matfuelcells\/wp-json\/wp\/v2\/media?parent=56"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}