The local compressibilities of Cr3+ and Mn4+ octahedral clusters in YAlO3 crystal are investigated by means of the pressure-induced (R) over bar -line shifts. The results suggest that the local compressibility changes from cluster to cluster and both compressibilities of 3d(3) impurity clusters are smaller than that of the corresponding Al3+ octahedral cluster in the host YAlO3 crystal. The causes of above results are discussed. (C) 2012 Elsevier B.V. All rights reserved.
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