Abstract
The composition dependence of shortrange structure was investigated for manganese borate glasses ((MnO)X(B2O3)1−X, X = 0.21, 0.30, 0.44, 0.52) by XAFS measurement. The manganese K-edge XAFS spectra of the glasses were measured at the beamline 4 (BL-4) station of the synchrotron radiation facility at Ritsumeikan University in Japan. From the XANES spectra, it was found that the manganese ion is divalent in the glasses and it does not vary with the MnO content. The EXAFS spectra indicate that the manganese ion is surrounded by four oxygen atoms with an interatomic distance of ca 2.1 Å. A notable composition dependence of the Mn-O correlation is not observed for the glasses.
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