✦ LIBER ✦

Raman intensities near gypsum–bassanite transition in natural gypsum

✍ Scribed by P. S. R. Prasad

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 85 KB
Volume: 30
Category: Article
ISSN: 0377-0486
DOI: 10.1002/(sici)1097-4555(199908)30:8<693::aid-jrs434>3.0.co;2-8

No coin nor oath required. For personal study only.

✦ Synopsis

The phase transition sequence of natural gypsum (CaSO 4 • 2H 2 O) was studied by Raman spectroscopy in the temperature range 300-550 K. The reduced peak intensity of the symmetric stretching mode around 1008 cm -1 varied anomalously during the gypsum-bassanite transition. From the spectral variations of this mode in the temperature range 300-415 K, the order parameter exponent b was estimated to be 0.46 ± 0.07.

📜 SIMILAR VOLUMES

Raman spectroscopic study of phase trans

Raman spectroscopic study of phase transitions in natural gypsum

✍ L. P. Sarma; P. S. R. Prasad; N. Ravikumar 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 249 KB 👁 2 views

The gypsum-bassanite-anhydrite phase transition sequence was followed up to 550 K at ambient pressure in a naturally occurring gypsum using Raman spectroscopy. The spectral variations of the internal (CaSO 4 AE 2H 2 O) modes of sulphate tetrahedra and were used to probe the structural phase transiti