| Автор | Wilding, M. C. |
| Автор | Benmore, C. J. |
| Автор | Weber, J. K. R. |
| Дата выпуска | 2010-01-01 |
| dc.description | X-ray diffraction data have been collected in situ for a series of magnesium silicate liquids between and including the two mineral compositions enstatite and forsterite (MgSiO<sub>3</sub> and Mg<sub>2</sub>SiO<sub>4</sub>). The pair distribution functions obtained from these data show that the local oxygen environment around the magnesium ions contrasts with that found in the equivalent glasses. We identify a transition window between 42 and 38 mole %SiO<sub>2</sub> where the average magnesium coordination number changes on cooling from a Mg-O coordination number of ∼5.1±0.2 in the liquid state to a value of 4.5±0.1 in the glass. This change in structure reflects a competition between a sparsely polymerised silicate network and a disordered magnesium framework in the liquid, while the silicate network dominates in the glass. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | Europhysics Letters Association |
| Название | Changes in the local environment surrounding magnesium ions in fragile MgO-SiO<sub>2</sub> liquids |
| Тип | lett |
| DOI | 10.1209/0295-5075/89/26005 |
| Electronic ISSN | 1286-4854 |
| Print ISSN | 0295-5075 |
| Журнал | EPL (Europhysics Letters) |
| Том | 89 |
| Первая страница | 26005 |
| Последняя страница | 26009 |
| Аффилиация | Wilding, M. C.; Institute of Mathematical and Physical Sciences, Aberystwyth University - Aberystwyth, Ceredigion, SY23 3BZ, UK, EU |
| Аффилиация | Benmore, C. J.; X-ray Science Division, Advanced Photon Source, Argonne National Laboratory 9700 Cass Avenue, Argonne, IL 60439, USA |
| Аффилиация | Weber, J. K. R.; X-ray Science Division, Advanced Photon Source, Argonne National Laboratory 9700 Cass Avenue, Argonne, IL 60439, USA; Materials Development Inc. - Arlington Heights, IL 60004, USA |
| Выпуск | 2 |
