Crystal structure and lattice vibration of proton dissolved BaZr0.8Sc0.2O2.9

Heat capacity and neutron diffraction measurements were carried out to determine the location of protons in the crystal of proton conducting perovskite oxide BaZr0.8Sc0.2O2.9. The heat capacity of proton- and deuteron-dissolved BaZr0.8Sc0.2O2.9 showed a slight difference from that of the dry sample. It indicates that the librational motion of the OH(OD) group is not excited below room temperature. The neutron diffraction experiments on the deutron dissolved sample indicate that the deuteron exists near the 12h site. (C) 2008 Elsevier B.V. All rights reserved.