Vaporization and deposition of cesium dimolybdate, Cs2Mo2O7. Issue 3 (4th March 2017)

• Record Type: Journal Article
• Authors: Do, Thi-Mai-Dung; Sujatanond, Supamard; Tachibana, Yu; Ogawa, Toru
• Is Part Of: Journal of nuclear science and technology. Volume 54:Issue 3(2017)
• Page Start: 330
• Page End: 336
• Publication Date: 2017-03-04
• Subjects: Cesium dimolybdate -- cesium molybdate -- enthalpy -- vaporization -- deposition -- Raman -- severe accident; Nuclear engineering -- Periodicals; Nuclear physics -- Periodicals; Nuclear energy -- Periodicals; 621.4805
• DOI: 10.1080/00223131.2016.1273146
• Languages: English
• ISSNs: 0022-3131

Abstract

ABSTRACT: Vaporization and deposition of cesium dimolybdate (Cs2 Mo2 O7 ) in argon were studied by thermogravimetry and transpiration methods. From Raman spectra and electron probe microanalysis of deposits and inductively coupled plasma mass spectroscopy of the aqueous trap of the exhaust, it was judged that the Cs2 Mo2 O7 vaporizes as Cs2 Mo2 O7 ( g ). The effect of water addition on Raman spectral of Cs2 Mo2 O7 was also investigated. Comparing the high-temperature mass losses of Cs2 Mo2 O7 by thermogravimetry with that of Cs2 MoO4, the equilibrium vapor pressure of Cs2 Mo2 O7 was estimated. The vapor pressure of Cs2 Mo2 O7 ( l ) in its liquid state was calculated to be: log10 P (Cs2 Mo2 O7 )( l ) = (8.95 ± 0.07) − (1.03 ± 0.01) × 10 4 / T ( T = 1273−1573 K). The enthalpy of vaporization of Cs2 Mo2 O7 ( l ) was estimated to be 197 ± 31 kJ·mol −1 .