xIR absorption spectra of phosphosilicate glasses containing 1-19 mol% of P2O5 are measured and analyzed. Interaction of hydroxyl groups with the phosphorus centres in the phosphosilicate glass is investigated in cluster models using PM3 and MNDO quantum-chemical methods. An explanation of the experimentally observed change of vibrational absorption bands caused by the hydroxyl groups is proposed. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 16]
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