Passlick, C.C.PasslickMüller, O.O.MüllerLutzenkirchen-Hecht, D.D.Lutzenkirchen-HechtFrahm, R.R.FrahmJohnson, J.A.J.A.JohnsonSchweizer, S.S.Schweizer2022-03-042022-03-042011https://publica.fraunhofer.de/handle/publica/22715410.1063/1.36621482-s2.0-84859312978The structure/property relationships of fluorochlorozirconate glass ceramics as a function of divalent and trivalent europium (Eu) co-doping and thermal processing have been investigated; the influence of doping ratio on the formation of barium chloride (BaCl(2)) nanocrystals therein was elucidated. X-ray absorption near-edge structure spectroscopy shows that the post-thermal annealing changes the Eu valence of the as-poured glass slightly, but during the melting process Eu(3+) is more strongly reduced to Eu(2+), in particular, when doped as a chloride instead of fluoride compound. The Eu(2+)-to-Eu(3+) doping ratio also plays a significant role in chemical equilibrium in the melt. X-ray diffraction measurements indicate that a higher Eu(2+) fraction leads to a BaCl(2) phase transition from hexagonal to orthorhombic structure at a lower temperature.en621697journal article