| Автор | Joon Hong Kim |
| Автор | A Petric |
| Автор | P K Ummat |
| Автор | W R Datars |
| Дата выпуска | 1994-07-11 |
| dc.description | Phase relations and thermodynamic properties of sodium fulleride (Na<sub>x</sub>C<sub>60</sub>)have been measured up to x=6 by the electromotive force (EMF) method. Na beta -alumina was used as the solid electrolyte and Na was added to the cell containing a fixed amount of fullerene by coulometric titration. The phase diagram is characterized by alternate single-phase regions (EMF varying with composition) and two-phase regions (EMF plateaus). At 599 K, the Gibbs energies of formation of Na<sub>3</sub>C<sub>60</sub> and Na<sub>6</sub>C<sub>60</sub> are 113.2 and 94.7 kJ/mole of Na, respectively. A model is proposed for the Na activity (or EMF) as a function of composition based on nearest-neighbour interactions, orientational disorder and a random distribution of Na ions. The ionic size and the hindrance of rotation of C<sub>60</sub> accounts for the miscibility gap in alkali fullerides in this model. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The phase diagram and thermodynamics of sodium fulleride from electrochemical measurements |
| Тип | paper |
| DOI | 10.1088/0953-8984/6/28/013 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 6 |
| Первая страница | 5387 |
| Последняя страница | 5396 |
| Аффилиация | Joon Hong Kim; Dept. of Mater. Sci. & Eng., McMaster Univ., Hamilton, Ont., Canada |
| Аффилиация | A Petric; Dept. of Mater. Sci. & Eng., McMaster Univ., Hamilton, Ont., Canada |
| Аффилиация | P K Ummat; Dept. of Mater. Sci. & Eng., McMaster Univ., Hamilton, Ont., Canada |
| Аффилиация | W R Datars; Dept. of Mater. Sci. & Eng., McMaster Univ., Hamilton, Ont., Canada |
| Выпуск | 28 |
