Olivine infrared spectroscopy

ABSTRACT The aim of this study was to test portable infrared spectroscopy for non-destructive analysis of ancient construction mortar. Mortar samples from the House of the Vestals, in Pompeii, Italy, were initially examined with traditional analytical techniques, including X-ray fluorescence, X-ray diffraction and thin section analysis. These techniques were used to establish mineralogical and chemical profiles of the samples and to verify the results of experimental field methods. Results showed the lime-based binder was composed of calcite, and the volcanic sand aggregate contained clinopyroxene, plagioclase, sanidine and olivine crystals. 

Jamtveit et al. (2001) measured water contents in olivines from basalts and picrites from the North Atlantic Volcanic Province using Fourier-transform infrared spectroscopy (FTIR). They found H2O contents from <0.5 ppm to —18 ppm, and suggested that oh vines with... 

The diffusion of H in San Carlos olivine single crystals was studied by performing experiments under hydrothermal conditions. The experiments were carried out at 1.5GPa, lOOOC for 1.5h in a piston cylinder apparatus, or at 0.2GPa, 900C for 1 or 20h in a cold-seal vessel. Polarized Fourier transform infrared spectroscopy was used to quantify the hydroxyl distributions. At high temperatures, hydrogenation was dominated by the coupled diffusion of protons and octahedrally coordinated metal vacancies. From the experimental data, Arrhenius expressions were determined ... 

---