Physicochemical properties of Ca3Mn1.5Fe1.5O8 the conventional solid-state reaction R. Selmi a,b,*, W. Cherif a,b, AR Sarabandoc, NM Ferreira aSfax University, Faculty of Sciences, B. P. 1171-30 0 0, Tunisia bSfax University, National School of Engineers, B. P. W 3038, Tunisia c CICECO-Aveiro Institue of Materials, University of Aveiro, 3810-193 Aveiro, Portugal d I3N-Aveiro, Department of Phisics, University of Aveiro, 3810-193 Aveiro, Portugal A R T I C L E I N F O Article history: Received 15 November 2021 Revised 19 April 2022 Accepted 22 April 2022 Available online 23 April 2022 Keywords: Crystal structure Hirshfield surface analyses Magnetic properties A B S T R A C T A new Ca3Mn1.5Fe1.5O8 is synthesized by ceramic compound crystallizes crystal structure for this by two layers of Fe2/Mn1O6 trostatic interactions Mn1/Fe2...O, is carried out long range. and ionic interactions. The frared spectroscopy (FTIR) (PM) behavior at high temperature temperature. 1. Introduction The interest in perovskite materials is not new, because these compounds of general structure ABO3, have very specific properties according to the cationic elements A and B, which one can choose from a wide range of elements of the periodic table. Simple perovskites, CaMnO3 and CaFeO3, were important sys-


A new Ca3Mn1.5Fe1.5O8 sample with a structure intermediate between the perovskite and brownmillerite, is synthesized by ceramic method. Rietveld refinement of powder X-ray diffraction data reveals that the compound crystallizes in the orthorhombic structure with Pm2a space group at room temperature. The crystal structure for this compound is formed by layers of Fe1O(4) tetrahedra, separated from each other by two layers of Fe2/Mn1O(6) octahedra. The Hirshfield surface analyses show that the intermolecular elec-trostatic interactions Mn1/Fe2...O, Ca1...O and Ca2...O are in short range, while the Fe1...O interaction is carried out long range. The electron density analysis proves that the structure is stabilized by covalent and ionic interactions. The orthorhombic phase is further supported by Raman and Fourier Transform In-frared spectroscopy (FTIR) analysis. The magnetic measurement indicated the existence of a paramagnetic (PM) behavior at high temperature and weak ferromagnetism with dominant antiferromagnetism at low temperature. (C) 2022 Elsevier B.V. All rights reserved.



subject category



Selmi, R; Cherif, W; Sarabando, AR; Ferreira, NM; Ktari, L

our authors



This paper within the framework of collaboration is sup-ported by the Tunisian Ministry of Higher Education and Sci-entific Research and the Portuguese Ministry of Science, Tech-nology and Higher Education . The authors acknowledge the i3N (UID/CTM/50025/2020) and CICECO-Aveiro Institute of Materials (UID/CTM/50011/2020) , financed by FCT/MEC and FEDER under the PT2020 Partnership Agreement. This work is also funded by na-tional funds (OE) , through FCT - Funda??o para a Ci?ncia e a Tecnologia, I.P., in the scope of the framework contract for eseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19.

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".