/ N. V. Tarakina [et al.]> // Dalton Trans. - 2015. -
Vol. 44,
Is. 42. - P. 18527-18535,
DOI 10.1039/c5dt01528f. - Cited References: 40. - The authors regret a spelling mistake in the surname of one of authors. The surname given as ‘Vasilev’ should be ‘Vasiliev’. - N.V.T. acknowledges funding by the Bavarian Ministry of Sciences, Research and the Arts. X-ray powder diffraction studies were carried out at the Center for collective use "X-ray structure analysis" at the Institute of Solid State Chemistry, Ural Branch of RAS (Ekaterinburg, Russia)
. - ISSN 1477-9226
Перевод заглавия: Синтез и кристаллическая структура нового гексагонального перовскита 7H-Ba7Li1.75Mn3.5O15.75 с зарядовым распределением Mn4+/Mn5+
РУБ Chemistry, Inorganic & Nuclear
Аннотация: Ba7Li1.75Mn3.5O15.75 is a new hexagonal perovskite whose crystal structure has elements typical for the layered hexagonal perovskites and quasi-one-dimensional oxides, hence representing a new polytype. It has been synthesized via a solid-state microwave route. The crystal structure was solved using a combination of X-ray and neutron diffraction data, which show that Ba7Li1.75Mn3.5O15.75 crystallizes in a hexagonal unit cell with parameters a = 5.66274(2) A and c = 16.7467(1) A (V = 465.063(4) A3), with one formula unit, and can be described as columns of face-shared octahedra occupied by Mn4+ and Li+ cations and vacancies along the c axis separated in the ab plane by barium atoms. Every sixth layer, the coordination of Mn5+ and Li+ changes to tetrahedral. Additional local ordering of manganese and lithium atoms among cationic sites leading to the formation of a rhombohedral supercell has been observed by scanning transmission electron microscopy.
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Держатели документа: The NanoVision Centre, School of Engineering and Materials Science, Queen Mary University of London Mile End, London, United Kingdom
Experimentelle Physik III, Physikalisches Institut and Wilhelm Conrad, Rontgen-Research Centre for Complex Material Systems, Universitat Wurzburg Am Hubland, Wurzburg, Germany
Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 91 Pervomayskaya, Ekaterinburg, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 50 Akademgorodok, Krasnoyarsk, Russian Federation
Доп.точки доступа: Tarakina, N. V.; Tyutyunnik, A. P.; Bazuev, G. V.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Gould, C.; Nikolaenko, I. V.; Berger, I. F.