Abstract
In magnesia cement, phase 3, a broad and strong infrared band was observed with the maximum at ∼1300 and 1050 cm −1 in the H and D systems, respectively. To clarify the origin of the 1300 cm −1 band the temperature dependency of the infrared spectra of the H system was observed and the spectra analyzed on the basis of a strong vibrational coupling of the OH stretching with lattice modes. The fitting was quite well, giving rise to the origin of the 1300 cm −1 band of the OH stretching.
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