Abstract: The infra-red spectra of silver germanate, thallium germanate, and thallium aluminogermanate glasses are presented for the 1100 cm−1 to 400 cm−1 region. The pseudo rare gas type Tl+ and Ag+ ions produce spectral shifts in binary germanate glasses that are similar to those reported for alkali ions. Differences for Tl+ may be due to its high atomic weight and polarising power. The infra-red spectral shifts observed for thallium aluminogermanate glasses are those expected if GeO6 octahedra disappear while AlO4 tetrahedra engage in network repa...
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Topics: 
Inorganic chemistry
Mineralogy