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Vibrational spectra and the ferroelectric phase transition of colemanite

โœ Scribed by R. F. Gallup; L. B. Coleman

Publisher
Springer-Verlag
Year
1990
Tongue
English
Weight
351 KB
Volume
17
Category
Article
ISSN
0342-1791

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โœฆ Synopsis

The infrared and far infrared (10-4000 cm-1) polarized, single crystal reflectivity of the calcium borate mineral colemanite, CaB30~(OH)3"HzO, have been measured at room temperature and at several temperatures below the ferroelectric phase transition at approximately 270 K. Over the entire frequency range studied, only minor spectral changes are seen at the ferroelectric phase transition.

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Vibrational study on ferroelectric phase
Vibrational study on ferroelectric phase transition in NaNH4SO4 ยท 2H2O
โœ Isao Kanesaka; Kenichi Ozaki ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 351 KB

## Abstract The vibrational spectra of NaNH~4~SO~4~ ยท 2H~2~O (SASD) and its 5% deuterated system were observed in the region of the Oโ€“X and Nโ€“X stretches (X = H or D) over the temperature range 300โ€“25 K. A similarity was found in the Raman spectral features associated with water molecules at room t