IR Measurements of Intracrystalline Water in Quartz at High Temperatures.

Time-Dependent Spectral Change of OH Species

Abstract

In-situ IR measurements were conducted with varying heating duration to study a time-dependent changes (i) an increase of the 3379cm^-1 absorption peak at room temperature (RT) assigned to OH associated with Al³⁺ substitution for Si (OH (Al) ) and (ii) a decrease of the 3482cm^-1 peak (RT) assigned to OH (Al) including a influence of Li⁺ interstitial defects or Li-O-Al as acharge compensating role. These (i) and (ii) are consideredto be dueto an exchangeof Li⁺ with H⁺, since theseions become more diffusive at higher temperatures.