2024 - Sustainable Industrial Processing Summit
SIPS 2024 Volume 4. Kanatzidis Intl. Symp / Solid State Chemistry and Materials
| Editors: | F. Kongoli, M.A. Alario-Franco, I. Chung, M. Delferro, O. Farha, H. Kageyama, F. Marquis, A. Navrotsky, A. Tressaud, P. Trikalitis |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2024 |
| Pages: | 222 pages |
| ISBN: | 978-1-998384-10-5 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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“PbCrO3”: THE MOST COMPLEX “SIMPLE” PEROVSKITE. A REVISION OF A SOLID-STATE CHEMISTRY CASE STUDY.
Miguel A. Alario Franco1; Ángel M. Arévalo-Lopez2;1COMPLUTENSE U. OF MADRID, Madrid, Spain; 2UNIVERSITÉ DE LILLE, Lille, France;
Type of Paper: Regular
Id Paper: 375
Topic: 52
Abstract:
We had found it being somewhat surprising that, in the following sequence of “simple” perovskites: PbTiO3 is tetragonal (c/a = 1.064), PbVO3 is also tetragonal with quite a higher tetragonal ratio (c/a =1,229) while PbCrO3 is cubic (¡) [1]. A detailed structural and compositional analysis by X ray and electron diffraction and high-resolution electron microscopy coupled with EDS, of this High-Pressure phase, has shown that the reliability factors of the Rietveld X-ray powder refinement of PbCrO3 could be improved by considering the lead ion in a multi- minimum potential displaced from its special position. Also, the microstructure of this material is a rather complex perovskite superstructure that presents a compositional modulation, within a microdomain distribution in a slightly lead deficient material [2]. The proposed supercell is ~ap x 3ap x (~14-18)ap; with ap being the average cubic perovskite parameter [3].