Аннотация
The crystallographic analysis of the structures of danburite CaSi2B2O8, which is orthorhombic (Pnma) at normal pressure, triclinic (P1 ¯) at a pressure of 25.4 GPa, and monoclinic (P21/c) at a pressure of 32.3 GPa, shows that they are based on a joint packing of Ca cations and O anions whose regularity increases with pressure. A common structural fragment is the configuration of atoms related by the glide reflection plane retaining for Ca and a part of O, B positions with a possible Si migration according to the seesaw mechanism (N. V. Belov).
Язык оригинала | английский |
---|---|
Страницы (с-по) | 1059-1067 |
Число страниц | 9 |
Журнал | Journal of Structural Chemistry |
Том | 61 |
Номер выпуска | 7 |
DOI | |
Состояние | Опубликовано - 1 июл 2020 |