Two-and three-component TeO 2 -based glasses prepared by melting appropriate oxide mixtures, followed by cooling or casting, are characterized by laser ultramicroscopy. The results demonstrate that the glasses contain microinhomogeneities 0.07-0.2 µ m in size at a level of 10 3 to 10 6 cm -3 . Their size and concentration depend on the glass composition and preparation conditions.
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