Thermodynamic properties of (NH4)2KGaF6 elpasolite

Autor:	M. L. Afanas’ev, Igor N. Flerov, T. V. Ushakova, Mikhail V. Gorev
Rok vydání:	2001
Předmět:	Phase transition Materials science Solid-state physics Transition temperature Hydrostatic pressure Ionic bonding Thermodynamics Atmospheric temperature range Condensed Matter Physics Spectroscopy Heat capacity Electronic Optical and Magnetic Materials
Zdroj:	Physics of the Solid State. 43:2301-2306
ISSN:	1090-6460 1063-7834
DOI:	10.1134/1.1427960
Popis:	The heat capacity of (NH4)2KGaF6 elpasolite is measured in the temperature range from 80 to 350 K. A sequence of three phase transitions at T 1=288.5 K, T 2=250 K, and T 3=244.5 K is revealed, and the thermodynamic characteristics of these transitions are determined. The influence of hydrostatic pressure on the phase transition temperature is investigated. The results obtained are discussed within the model of orientational ordering of NH 4 + and GaF 6 3− ionic groups.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8c941f1ff770ce76907c8ffa6090b310 https://doi.org/10.1134/1.1427960 Zobrazit plný text záznamu Full text from SpringerLink