Infrared absorption spectra of sodium silicate glasses at high pressures

Abstract
Infrared absorption spectra of 12 sodiumsilicate glasses of varying composition (10 to 45 mole% Na2O) are examined at varying pressures to 58.8 kbar. The pressure dependences of all the infrared absorption frequencies studied are found to be positive. Grüneisen γ's are evaluated from the pressure dependence of the infrared vibrations and elastic parameters. The results are compared with those obtained from previous high‐pressure studies of α‐quartz and several other silicate glasses.

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