The infrared absorption spectra of xZnO(40-x)Fe 2 O 3 .60B 2 O 3 glasses (x = 0, 10, 15, 20 and 30 mol% of ZnO) have been investigated to find out the role played by zinc on the structure of these glasses. ZnO was gradually introduced to replace Fe 2 O 3 in the series of zinc doped iron borate glasses containing 60% B 2 O 3. The structural changes were inferred by monitoring the infrared spectra of these glasses in the range 200-4000 cm-1 by KBr technique. Very small change in absorption bands

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... ay occur on addition of ZnO impurity in the series of zinc doped iron borate glasses. No boroxyl ring formation is observed in the structure of these glasses. Similarly, tetrahedral formation of zinc is not observed. The absence of absorption band corresponding to a frequency of 806 cm-1 is attributed to the progressive substitution of boroxol ring by triborate (BO 3) and tetraborate (BO 4) groups.