Temperature dependence of the thermodynamic parameters of cobalt(II) clathrochelate: X-ray diffraction and calorimetric characteristics of the low temperature structural phase transition

Autor:	Yu. A. Kovalevskaya, I. E. Paukov, V. I. Ovcharenko, Ya. Z. Voloshin, Galina V. Romanenko
Rok vydání:	2012
Předmět:	Diffraction Phase transition Clathrochelate Chemistry Enthalpy chemistry.chemical_element Thermodynamics Atmospheric temperature range Heat capacity Inorganic Chemistry X-ray crystallography Materials Chemistry Physical and Theoretical Chemistry Cobalt
Zdroj:	Journal of Structural Chemistry. 53:388-392
ISSN:	1573-8779 0022-4766
DOI:	10.1134/s0022476612020278
Popis:	The temperature dependence of heat capacity of the polycrystalline sample of cobalt(II) clathrochelate in a range of 6–300 K is studied. Based on the smoothed dependence C p(T), the entropy and enthalpy values in a temperature range of 8–300 K and their standard values at 298.15 K are calculated. In the C p(T) curve in a range of 50–70 K, a process is recorded whose entropy and enthalpy are 1.2 J·(K·mol−1) and 68 J·mol−1 respectively. A comparison of the results with the data of a multitemperature X-ray diffraction study makes it possible to attribute this process to the structural phase transition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a133953fa22e2e69d91d01398c8757a7 https://doi.org/10.1134/s0022476612020278 Zobrazit plný text záznamu Plný text ve formátu PDF