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Mixtures of 30% Bi 2 O 3 and 70% GeO 2 (in molar percents) were prepared followed by the solid state reaction at 700 o C for 30 min. or 24 h using an Al 2 O 3 crucible. After melting at 1050 o C for 10 min. the melt was poured into a preheated graphite plate and then naturally cooled to room temperature (RT). X-ray diffraction measurements (XRD) on the resulting BGO glasses have been performed, and optical absorption spectra recorded at room temperature on the samples obtained using various preparation conditions.

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