FTIR spectroscopic study of some bismuth germanate glasses containing gadolinium ions

Abstract Since infrared spectroscopy and density are advantageous tools for the investigations of glasses, we have used them to obtain information concerning the local structure of x Gd 2 O 3 ·(100 −  x )[4Bi 2 O 3 ·GeO 2 ] glass system, with 0 ≤  x  ≤ 30 mol%. Gd 2 O 3 play the network modifier role in the studied glasses and determines, by progressive addition, the increase of structural volume difference between the hypothetical crystalline compounds and the quenched samples. FTIR spectroscopy data show that the glass structure consists on the BiO 6 , GeO 4 and GeO 6 structural units, and the conversion among these units mainly depends on the Gd 2 O 3 content.

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