The thermodynamic functions of potassium uranoniobate

Authors
Karyakin, NV Chernorukov, NG Suleimanov, EV Trostin, VL Alimzhanov, MI Makarov, AV
Citation
Nv. Karyakin et al., The thermodynamic functions of potassium uranoniobate, RUSS J PH C, 75(7), 2001, pp. 1073-1078
Citations number
16
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY
ISSN journal
00360244 → ACNP
Volume
75
Issue
7
Year of publication
2001
Pages
1073 - 1078
Database
ISI
SICI code
0036-0244(200107)75:7<1073:TTFOPU>2.0.ZU;2-V
Abstract
The standard enthalpies of formation at 298.15 K were determined for crysta lline alpha -KNbUO6, beta -KNbUO6, and KNbUO6 1.5H(2)O. The temperature dep endence of the heat capacity of alpha -KNbUO6 and KNbUO6 1.5H(2)O was studi ed in the temperature range 5-300 K, and that of beta -KNbUO6, in the tempe rature range 55-300 K. The thermodynamic functions and the equilibrium cons tants were calculated at several temperatures for reactions leading to pota ssium uranoniobates.