EXAFS and XANES study of the incorporation of Mn cations into a chabazite-like AlPO molecular sieve

Abstract

The incorporation of Mn(II) cations into a chabazite-like MnAlPO material is studied with Mn K-edge XANES and EXAFS. Both methods show that Mn(II) is inserted exclusively into the tetrahedrally coordinated aluminum sites. Calcination and rehydration of the as-synthesized MnAlPO cause a partial oxidation of Mn(II) as well as a change of its coordination geometry to a distorted octahedron.