Characterization of Ca2AlMnO5. A comparative study between Ca2AlMnO5 and Ca2AlFeO5

Ca2AlMnO5 compound has been characterized through the following instrumental techniques: X-ray diffraction; IR spectroscopy, electronic spin resonance and differential thermal analysis. The crystalline structure of Ca2AlMnO5 has been shown to be an orthorhombic type. Its cell parameters have been determined as well. In addition, it was verified that all manganese in this phase is present in the Mn3− form. This element occupies both octahedral positions and tetraedral ones in the mentioned orthombic cell. Finally, the differences existing between Ca2AlMnO5 and Ca2AlFeO5 have been determined: the bases by which both phases can be identified by means of the above mentioned instrumental techniques have been established.