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IR spectra changes of the xV 2 O 5 (1−x)[0.8P 2 O 5 ⋅0.2Bi 2 O 3 ] glass system with 0⩽x⩽50mol% show that vanadium oxide acts as a network modifier at low concentration (x⩽5mol%), affecting especially the Bi 2 O 3 network. In the same time the phosphate groups (structures) impose their presence by themselves, fact which is illustrated...
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