Oxygen defects and crystal structure of the n = 3Ruddlesden Popper system LaSr3(Co,Fe,Ga)3O10-d
The crystal chemistry of the n = 3 Ruddlesden-Popper oxides LaSr3(Co,Fe,Ga)O10-delta will be studied. On one hand we are interested to determine the oxygen defect structure of the LaSr3Co1.5Fe1.5O10-delta phase in the temperature range 20 < T < 900 ºC in air. We expect to determine with accuracy both the position and the occupation number for the four oxygen atoms at high temperature to explain the mechanism for oxygen diffusion at high temperature. On the other hand, we propose to study the structural transformation from tetragonal (I4/mmm)to orthorhombic (Fmmm)symmetry observed in the LaSr3(Co,Fe,Ga)O10-delta R-P phases when either Fe and Co are replaced by Ga or oxygen atoms are removed from de crystal structure. We are asking for 2 days on D2B.
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PRADO Fernando and CUELLO Gabriel. (2012). Oxygen defects and crystal structure of the n = 3Ruddlesden Popper system LaSr3(Co,Fe,Ga)3O10-d. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-23-649
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